Recent zbMATH articles in MSC 74H https://zbmath.org/atom/cc/74H 2022-06-24T15:10:38.853281Z Werkzeug Spectral properties of a fourth-order differential operator with eigenvalue parameter-dependent boundary conditions https://zbmath.org/1485.34087 2022-06-24T15:10:38.853281Z "Mehrabov, Vuqar A." https://zbmath.org/authors/?q=ai:mehrabov.vuqar-a Summary: This paper is devoted to the study of the spectral properties of one eigenvalue problem for the fourth-order ordinary differential equations with a spectral parameter contained in two of the boundary conditions. This spectral problem arises when the Fourier method is applied to a boundary value problem for partial differential equations describing small bending vibrations of a homogeneous rod under the action of a longitudinal force in cross sections. The left end of the rod is either free or freely supported, and the inertial mass is concentrated on the right end. We find the arrangement of the eigenvalues on the real axis, determine the multiplicities of all eigenvalues, and study the asymptotic behavior of the eigenvalues and eigenfunctions of this problem. Moreover, sufficient conditions were found under which the system of root functions with two removed functions is a basis in the space $$L_p$$, $$1< p < \infty$$. Cauchy problem for the equation of longitudinal vibrations of a thick rod with allowance for transverse inertia https://zbmath.org/1485.35122 2022-06-24T15:10:38.853281Z "Umarov, Kh. G." https://zbmath.org/authors/?q=ai:umarov.khasan-galsanovich Summary: For a nonlinear differential equation of Sobolev type describing the longitudinal vibrations of a thick rod with allowance for its transverse inertia, we study the solvability of the Cauchy problem in the half-plane $$(x,t)\in \mathbb{R}^1\times [0,+\infty )$$ in the class of functions that, for each fixed value of the time variable $$t\geq 0$$, are continuous on the entire real line and have finite limits at infinity. Both sufficient conditions for the existence of a global solution of the Cauchy problem and sufficient conditions for its blowup on a finite time interval are found. Dilatation gradient elasticity theory https://zbmath.org/1485.74012 2022-06-24T15:10:38.853281Z "Lurie, Sergey A." https://zbmath.org/authors/?q=ai:lurie.sergey-a "Kalamkarov, Alexander L." https://zbmath.org/authors/?q=ai:kalamkarov.alexander-l "Solyaev, Yury O." https://zbmath.org/authors/?q=ai:solyaev.yury-o "Volkov, Alexander V." https://zbmath.org/authors/?q=ai:volkov.alexander-v Summary: A simplified version of the strain gradient elasticity theory, in which all gradient effects are related to the first scalar invariant of the infinitesimal strain tensor, i.e., to the dilatation, is developed. Two variants of the theory with different forms of boundary conditions are derived using the variational approach. The first variant is derived taking into account independence of the dilatation variation on the body surface and it has simplified traction boundary conditions formulated only with respect to the total stress tensor. The second variant is derived following a general procedure exploiting the surface divergence theorem which results in a more complex form of boundary conditions on the body surfaces and edges. Correctness of the presented formulations of the theory is discussed. Examples of analytical solutions for the problems of pure bending, pressurized sphere and radial vibrations of sphere are obtained and compared for both variants of the theory. A dynamic order reduction method for fluid-structure systems https://zbmath.org/1485.74022 2022-06-24T15:10:38.853281Z "Sotoudehnia, Ebrahim" https://zbmath.org/authors/?q=ai:sotoudehnia.ebrahim "Shahabian, Farzad" https://zbmath.org/authors/?q=ai:shahabian.farzad "Sani, Ahmad Aftabi" https://zbmath.org/authors/?q=ai:sani.ahmad-aftabi Summary: In this paper, an iterative method is proposed to reduce the order of the coupled eigenvalue problem related to fluid-structure interaction systems. In fact, it is required to solve a smaller eigenvalue problem rather than the larger one (original) to compute the natural frequencies and mode shapes of the system. To this end, all degrees of freedom (DOFs) of the system are divided into master (retained) and slave (eliminated) ones. Then, the problem is re-expressed based on the master DOFs and a transformation matrix is introduced. The results show a remarkable decline in computational costs, whereas the accuracy of the modal outputs does not significantly decrease. A stopping criterion is defined to check whether the iterative process converges. Moreover, three fluid-structure systems are analyzed, including a two-dimensional fully-filled concrete tank, a two-dimensional gravity dam-reservoir, and a three-dimensional arch dam-reservoir, to assess the correctness and performance of the presented method. Findings prove that the proposed method is able to reduce the order of the eigenvalue problem of fluid-structure systems. Potential method in the coupled linear theory of elasticity for materials with triple porosity https://zbmath.org/1485.74023 2022-06-24T15:10:38.853281Z "Svanadze, M." https://zbmath.org/authors/?q=ai:svanadze.maia-m|svanadze.merab-zh Summary: In the present paper, the coupled linear model of elastic triple-porosity materials is considered in which the coupled phenomenon of the concepts of Darcy's law and the volume fractions of three levels of pores (macro-, meso- and micropores) is proposed. The basic boundary value problems of steady vibrations are investigated by means of the potential method (boundary integral equation method) and the theory of singular integral equations. In particular, the fundamental solution of the system of steady vibration equations is constructed explicitly by means of elementary functions and Green's identities are obtained. The basic properties of the surface and volume potentials are established. On the basis of Green's identities and the properties of these potentials, the existence and uniqueness theorems for the classical solutions of the basic boundary value problems of the theory under consideration are proved. Spectral properties of non-homogeneous Timoshenko beam and its controllability https://zbmath.org/1485.74029 2022-06-24T15:10:38.853281Z "Sklyar, G. M." https://zbmath.org/authors/?q=ai:sklyar.grigory-mikhailovitch "Szkibiel, G." https://zbmath.org/authors/?q=ai:szkibiel.grzegorz Summary: Controllability of slowly rotating non-homogeneous beam clamped to a disc is considered. It is assumed that at the beginning the beam remains at the position of rest and it is supposed to rotate by the given angle and achieve desired position. The rotor of propelling engine is in the middle of the disk. The movement is governed by the system of two differential equations with non-constant coefficients: linear mass density, flexural rigidity, rotational inertia and shear stiffness. To solve the problem of controllability, the spectrum of the operator generating the dynamics of the model is studied. Then the problem of controllability is reduced to the moment problem that is, in turn, solved with the use of the asymptotics of the spectrum and Ullrich theorem. Regularized optimal control problem for a beam vibrating against an elastic foundation https://zbmath.org/1485.74030 2022-06-24T15:10:38.853281Z "Bock, Igor" https://zbmath.org/authors/?q=ai:bock.igor "Kečkemétyová, Mária" https://zbmath.org/authors/?q=ai:keckemetyova.maria Summary: We deal with an optimal control problem governed by a nonlinear hyperbolic initial-boundary value problem describing the perpendicular vibrations of a clamped beam against a $$u$$ elastic foundation. A variable thickness of a beam plays the role of a control variable. The original equation for the deflection is regularized in order to derive necessary optimality conditions. Test study and nonlinear dynamic analysis of planar multi-link mechanism with compound clearances https://zbmath.org/1485.74031 2022-06-24T15:10:38.853281Z "Jiang, Shuai" https://zbmath.org/authors/?q=ai:jiang.shuai "Chen, Xiulong" https://zbmath.org/authors/?q=ai:chen.xiulong Summary: Clearance of kinematic pairs and flexibility of components are unavoidable problems in engineering applications. Dynamical model of planar rigid 2 DOFs 9 bars rigid-flexible coupling mechanism with compound clearances (including revolute clearance and translational clearance) is built. Comparison of dynamic response and nonlinear characteristic of rigid mechanisms with compound clearances and rigid-flexible coupling mechanisms with compound clearances is studied with each other. Influences of various clearance sizes and driving speeds on nonlinear dynamics characteristics of rigid-flexible coupling mechanisms with compound clearances have been both researched by center trajectory diagram, phase maps, Poincaré maps and bifurcation diagrams. In order to verify correctness of theoretical results, test study of 2 DOFs 9 bars mechanism with compound clearances is carried out. Influences of different clearance sizes and driving speeds on mechanism with compound clearances have been also studied by test. Coupled vibration analysis for equivalent dynamic model of the space antenna truss https://zbmath.org/1485.74032 2022-06-24T15:10:38.853281Z "Liu, Mei" https://zbmath.org/authors/?q=ai:liu.mei "Cao, Dengqing" https://zbmath.org/authors/?q=ai:cao.dengqing "Zhu, Dongfang" https://zbmath.org/authors/?q=ai:zhu.dongfang Summary: A novel equivalent dynamic model is developed for coupled vibration analysis of the space antenna truss to enhance the design capacity of vibration controllers. Based on energy equivalence principle, the space antenna truss with two important features of rigid joints and complicated configuration is equivalent to a spatial anisotropy Timoshenko beam model. According to the kinematic assumptions, strain and kinetic energy expressions of the spatial periodic element can be obtained in accordance with displacement components at its center. Hamilton's principle is carried out to formulate the governing partial differential equations of motion for the equivalent beam model (EBM) which is divided into two sets of PDEs. Each set of PDEs includes three degrees of freedom and describes bending-torsion and bending-extension couplings respectively, due to the asymmetry of the antenna truss. An exact analytical method is developed to solve the two sets of coupled motion equations. The natural characteristics of the EBM are shown to be in excellent agreement with those of the finite element method, which demonstrates that the proposed EBM can provide a satisfactory accuracy for the antenna truss. In addition, since the mode shapes of the EBM are expressed as analytical functions of the spatial coordinate, such an approach may lead the investigations of dynamic property and the design of vibration control law to become convenient for the space antenna truss. An innovative series solution for dynamic response of rectangular Mindlin plate on two-parameter elastic foundation, with general boundary conditions https://zbmath.org/1485.74033 2022-06-24T15:10:38.853281Z "Mohammadesmaeili, Reyhaneh" https://zbmath.org/authors/?q=ai:mohammadesmaeili.reyhaneh "Motaghian, Seyedemad" https://zbmath.org/authors/?q=ai:motaghian.seyedemad "Mofid, Massood" https://zbmath.org/authors/?q=ai:mofid.massood In this paper, a new analytical approach is presented in order to investigate free vibration and buckling analysis of Mindlin rectangular plates with general boundary conditions resting on Winkler-Pasternak foundations. Evidently, the method introduced by \textit{W. L. Li} et al. [An exact series solution for the transverse vibration of rectangular plates with general elastic boundary supports'', J. Sound Vib. 321, No. 1--2, 254--269 (2009; \url{doi:10.1016/j.jsv.2008.09.035})] is extended to a Mindlin plate, establishing three sets of Fourier sine and cosine series accompanied with auxiliary functions, pertaining to the fundamental variables in Mindlin plate theory, namely deflection, rotation about $$x$$-axis and rotation about $$y$$-axis. However, since in Kirchhoff theory there is only one independent function (the deflection function), just one series expression is required such as the one used by Li et al. [loc. cit.]. The boundary conditions in this research are elastic constraints which are modeled by translational and rotational springs. Therefore, all possible edge conditions including classical ones can be addressed. Moreover, this paper presents the responses of plates lying on two-parameter foundations with arbitrary stiffness functions. The proposed method incorporates general elastic supports for all plate edges, and subsequently can deal with all possible boundary conditions including classical ones as well as uniform or non-uniform elastic constraints. The natural frequencies and buckling loads in several examples are determined to merely show the accuracy of the presented approach. A large amount of data has been generated which can be of use to design engineers. Reviewer: Girish Kumar Ramaiah (Bangalore) Oscillations of an elastic ellipsoid with Young modulus specified by a quadratic function of the coordinates https://zbmath.org/1485.74034 2022-06-24T15:10:38.853281Z "Sudakov, S. N." https://zbmath.org/authors/?q=ai:sudakov.s-n Translation from the Russian: Small oscillations of an elastic ellipsoid are studied whose Young modulus is a specially chosen quadratic function of the coordinates. The density and the Poisson coefficient of the material from which the ellipsoid is formed are constant. The quadratic function defining the Young modulus is chosen so that the deformations of the elastic medium under oscillations are homogeneous. Analysis of complex modal instability of a minimal friction self-excited vibration system from multiscale fractal surface topography https://zbmath.org/1485.74035 2022-06-24T15:10:38.853281Z "Pan, Wujiu" https://zbmath.org/authors/?q=ai:pan.wujiu "Ling, Liangyu" https://zbmath.org/authors/?q=ai:ling.liangyu "Qu, Haoyong" https://zbmath.org/authors/?q=ai:qu.haoyong "Wang, Minghai" https://zbmath.org/authors/?q=ai:wang.minghai Summary: In order to reveal the stability and nonlinear characteristics of the friction self-excited vibration system from the perspective of microscopic multiscale fractal surface topography, a minimal two-degree-of-freedom mathematical model of the disc brake system is established in this paper. Considering the fractal characteristics of rough surface topography, the fractal contact stiffness of contact surfaces is introduced into the system model from the perspective of microscopic contact, and the effects of two important surface fractal parameters, fractal dimension $$D$$ and fractal roughness $$G$$, on the stability and nonlinearity of the system are analyzed. Further finite element analysis and brake noise test improve the analysis of system stability and noise intensity by different surface topographies. The results show that the system stability can be improved with the increase of fractal dimension within a certain range, and the system will be in a stick state with the further increase of fractal dimension. With the increase of fractal roughness, the unstable modal coupling region of the system is increasing, which can reduce the stability of the system. The unstable region of the system is dependent on fractal dimension and fractal roughness, and has different sensitivity to them. Complex stability boundaries of axially moving beams with interdependent speed and tension https://zbmath.org/1485.74036 2022-06-24T15:10:38.853281Z "Tang, You-Qi" https://zbmath.org/authors/?q=ai:tang.youqi "Zhou, Yuan" https://zbmath.org/authors/?q=ai:zhou.yuan "Liu, Shuang" https://zbmath.org/authors/?q=ai:liu.shuang "Jiang, Shan-Ying" https://zbmath.org/authors/?q=ai:jiang.shanying Summary: In this article, dynamic stabilities of axially accelerating viscoelastic beams with interdependent speed and tension is investigated. The effect of the interdependent speed and tension is highlighted. However, time dependent speeds and time dependent tensions are independent of each other in previous studies. The dynamic equilibrium approach is used to obtain the governing equation of the axially accelerating viscoelastic beam with internal and principal parametric resonance. Another highlight is that the simply supported boundary conditions are given in precise forms, that are, inhomogeneous forms. The nonhomogeneous terms are closely related to Kelvin-Voigt viscoelastic constitutive relation. The method of directly multiple scales with a first-order uniform expansion is employed. By using the technique of the modified solvability conditions, the complex variable modulation equations are deduced in detail. By some numerical examples, the influences of viscosity, internal resonance, axial tension perturbation amplitude, axial speed perturbation amplitude, and old and current models on the stability boundaries are given. In addition, the approximate analytical results are compared with the numerical integration results by applying the differential quadrature method. Dynamic analysis and chaos control of spur gear transmission system with idler https://zbmath.org/1485.74037 2022-06-24T15:10:38.853281Z "Arian, Ghasem" https://zbmath.org/authors/?q=ai:arian.ghasem "Taghvaei, Sajjad" https://zbmath.org/authors/?q=ai:taghvaei.sajjad Summary: This study aims to analyze the chaotic dynamics and present a chaos controller for spur gear transmission systems with idler. The chaotic dynamics of the spur gear mechanism has already been investigated. However, the presence of idler gears affects the chaotic behavior and the route to chaos for the nonlinear model of spur gears. This is investigated through the derivation of dimensionless dynamics, defining a Poincare' section, and extracting the bifurcation diagrams of the system for variations of several parameter models. A nonlinear time-varying dynamic model of a spur gear transmission system with idler is established where backlash, time-varying stiffness, static transmission error, and external excitation are included and a region for the occurrence of chaos is found. The chaotic vibration suppression of the system is done by detecting the unstable periodic orbits embedded in the strange attractors and developing control law by employing sliding mode and adaptive sliding mode control strategy. The controller transmits a chaotic trajectory into the detected unstable periodic orbits. Numerical simulations including phase plane portrait, time histories diagrams, Poincare' sections, and bifurcation diagrams demonstrate the behavior of the system and confirm the performance of the proposed controller. Inverse problem of determining an unknown coefficient in the beam vibration equation https://zbmath.org/1485.74038 2022-06-24T15:10:38.853281Z "Durdiev, U. D." https://zbmath.org/authors/?q=ai:durdiev.umidzhan-durdimuratovich Summary: We consider the direct initial-boundary value problem for the equation of transverse vibrations of a homogeneous beam freely supported at the ends and study the inverse problem of determining the time-dependent beam stiffness coefficient. With the help of the eigenvalues and eigenfunctions of the beam vibration operator, the problems are reduced to integral equations. The Schauder contraction principle is applied to these equations, and theorems on the existence and uniqueness of solutions are proved. On the rotation of an elastic ellipsoid with Young modulus specified by a quadratic function of the coordinates https://zbmath.org/1485.74039 2022-06-24T15:10:38.853281Z "Sudakov, S. N." https://zbmath.org/authors/?q=ai:sudakov.s-n Translation from the Russian: We study the deformations of an ellipsoidal elastic body, which are induced by uniform rotation about the principal axis. We assume that the Young modulus is specified by a quadratic function of the coordinates. One-dimensional stress-driven nonlocal integral model with bi-Helmholtz kernel: close form solution and consistent size effect https://zbmath.org/1485.74054 2022-06-24T15:10:38.853281Z "Bian, Pei-Liang" https://zbmath.org/authors/?q=ai:bian.peiliang "Qing, Hai" https://zbmath.org/authors/?q=ai:qing.hai "Gao, Cun-Fa" https://zbmath.org/authors/?q=ai:gao.cun-fa Summary: In this paper, stress-driven nonlocal integral model with bi-Helmholtz kernel is applied to investigate the elastostatic tensile and free vibration analysis of microbar. The relation between nonlocal stress and strain is expressed as first type of Fredholm integral equation which is transformed to first type of Volterra integral equation. The general solution to the axial displacement of nonlocal microbar is obtained through the Laplace transformation with four unknown constants. Taking advantage of boundary and constitutive constraint equations, one can obtain the exact tensile displacements of microbar under different boundary and loading conditions, and the nonlinear characteristic equations about vibration frequency of clamped-free and clamped-clamped nonlocal microbars. Numerical results show that the nonlocal microbar model can be degraded to local bar model when the nonlocal parameters approach to 0, and a consistent toughening response for elastostatic tension and free vibration can be obtained for different boundary and loading conditions. Theory of solutions for an inextensible cantilever https://zbmath.org/1485.74056 2022-06-24T15:10:38.853281Z "Deliyianni, Maria" https://zbmath.org/authors/?q=ai:deliyianni.maria "Webster, Justin T." https://zbmath.org/authors/?q=ai:webster.justin-t Summary: Recent equations of motion for the large deflections of a cantilevered elastic beam are analyzed. In the traditional theory of beam (and plate) large deflections, nonlinear restoring forces are due to the effect of stretching on bending; for an inextensible cantilever, the enforcement of arc-length preservation leads to quasilinear stiffness effects and inertial effects that are both nonlinear and nonlocal. For this model, smooth solutions are constructed via a spectral Galerkin approach. Additional compactness is needed to pass to the limit, and this is obtained through a complex procession of higher energy estimates. Uniqueness is obtained through a non-trivial decomposition of the nonlinearity. The confounding effects of nonlinear inertia are overcome via the addition of structural (Kelvin-Voigt) damping to the equations of motion. Local well-posedness of smooth solutions is shown first in the absence of nonlinear inertial effects, and then shown with these inertial effects present, taking into account structural damping. With damping in force, global-in-time, strong well-posedness result is obtained by achieving exponential decay for small data. On the stability of vibrations of elastic doubly-connected plates in a two-layer ideal fluid https://zbmath.org/1485.74060 2022-06-24T15:10:38.853281Z "Karnaukh, A. Yu." https://zbmath.org/authors/?q=ai:karnaukh.a-yu (no abstract) History-dependent sweeping processes in contact mechanics https://zbmath.org/1485.74072 2022-06-24T15:10:38.853281Z "Nacry, Florent" https://zbmath.org/authors/?q=ai:nacry.florent "Sofonea, Mircea" https://zbmath.org/authors/?q=ai:sofonea.mircea Summary: We consider a special type of sweeping process in real Hilbert spaces, governed by two (possibly history-dependent) operators. We associate to this problem an auxiliary time-dependent inclusion for which we establish an existence and uniqueness result. The proof is based on arguments of convex analysis and fixed point theory. From the unique solvability of the intermediate inclusion, we derive the existence of a unique solution to the considered sweeping processes. Our theoretical results find various applications in contact mechanics. As an example, we consider a frictional contact problem for viscoelastic materials. We list the assumptions on the data and provide a variational formulation of the problem, in a form of a sweeping process for the strain field. Then, we prove the unique solvability of the sweeping process and use it to obtain the existence of a unique weak solution to the viscoelastic contact problem. Optimal design of the damping properties of porous metal composites https://zbmath.org/1485.74078 2022-06-24T15:10:38.853281Z "Arkhipov, Igor' Konstantinovich" https://zbmath.org/authors/?q=ai:arkhipov.igor-konstantinovich "Abramova, Vlada Igorevna" https://zbmath.org/authors/?q=ai:abramova.vlada-igorevna "Kuzovleva, Ol'ga Vladimirovna" https://zbmath.org/authors/?q=ai:kuzovleva.olga-vladimirovna "Gvozdev, Aleksandr Evgen'evich" https://zbmath.org/authors/?q=ai:gvozdev.aleksandr-evgenevich "Semenova, Galina Vladimirovna" https://zbmath.org/authors/?q=ai:semenova.galina-vladimirovna Summary: The maximum value of the vibration decrement of a porous metal composite made using 3D technology is determined. The influence of porosity on the damping and stiffness properties of the composite is studied. The optimal porosity value is obtained, which provides a maximum of the vibration decrement at a significant load level on the sample. The results of numerical calculation of the decrement for a composite made of chromium-nickel porous steel are presented. Isogeometric analysis for non-classical Bernoulli-Euler beam model incorporating microstructure and surface energy effects https://zbmath.org/1485.74094 2022-06-24T15:10:38.853281Z "Yin, Shuohui" https://zbmath.org/authors/?q=ai:yin.shuohui "Deng, Yang" https://zbmath.org/authors/?q=ai:deng.yang "Yu, Tiantang" https://zbmath.org/authors/?q=ai:yu.tiantang "Gu, Shuitao" https://zbmath.org/authors/?q=ai:gu.shuitao "Zhang, Gongye" https://zbmath.org/authors/?q=ai:zhang.gongye Summary: The non-classical Bernoulli-Euler beam model contains a material length scale parameter to account for the microstructure effect on the bulk material and three surface elasticity constants to capture the distinguished material properties on a surface. The present work is dedicated to develop a new effective computational approach for the non-classical Bernoulli-Euler beam model based on the isogeometric analysis (IGA) with high-order continuity basis functions of non-uniform rational B-splines (NURBS), which effectively fulfills the higher continuity requirements in the non-classical Bernoulli-Euler beam. To verify the new approach, the numerical results obtained from the new developed approach of the two applications for both simply supported and cantilever beams are compared with the corresponding analytical results available in the literature. Eventually, the approach verified is further utilized to explore the effects of microstructure and surface energy on beam deflection and natural frequency. For the static bending problem, it is detected that both the microstructure and surface energy effects enhance the beam bending stiffness. And for the free vibration problem, it is found that both the microstructure and surface energy effects increase the beam natural frequency. Furthermore, it is seen that the effect of microstructure on the natural frequency is more significant than the surface energy effect at nanoscale. Hidden photon dark matter interacting via axion-like particles https://zbmath.org/1485.83030 2022-06-24T15:10:38.853281Z "Arias, Paola" https://zbmath.org/authors/?q=ai:arias.paola "Arza, Ariel" https://zbmath.org/authors/?q=ai:arza.ariel "Jaeckel, Joerg" https://zbmath.org/authors/?q=ai:jaeckel.joerg "Vargas-Arancibia, Diego" https://zbmath.org/authors/?q=ai:vargas-arancibia.diego A study on the coefficient of restitution effect on single-sided vibro-impact nonlinear energy sink https://zbmath.org/1485.93418 2022-06-24T15:10:38.853281Z "Saeed, Adnan S." https://zbmath.org/authors/?q=ai:saeed.adnan-s "Al-Shudeifat, Mohammad A." https://zbmath.org/authors/?q=ai:al-shudeifat.mohammad-a Summary: Vibration mitigation is an essential factor in many engineering applications given the high risk of failure due to the frequent occurrence of earthquakes, blasts, collisions and fluid-structure interaction. Linear and nonlinear vibration absorbers have been continuously studied to be employed in such structures to decrease the vibration levels and therefore protect them from destruction. Up to date, the most effective and efficient passive vibration absorber is the single-sided vibro-impact (SSVI) nonlinear energy sink (NES) which consists of a small mass attached to the primary structure via linear stiffness and linear damping coupling elements in addition to a rigid barrier that enables it to engage in non-smooth inelastic impacts. It has been shown in the literature that an accurately optimized SSVI NES is capable of transferring and dissipating high percentages of the initial input energy into the primary structure. However, most of the investigations in the literature implement a coefficient of restitution of 0.7 corresponding to steel-to-steel impacts. Consequently, this paper investigates further improvements to the SSVI NES by studying the effect of changing the coefficient of restitution to increase the efficiency of targeted energy transfer (TET). It is found that lowering the coefficient of restitution increases the efficiency of the SSVI NES to transfer and dissipate energy from a large-scale nine-story structure. For the entire collection see [Zbl 1477.93110].