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A spectral multipole method for efficient solution of large-scale boundary element models in elastostatics. (English) Zbl 0852.73076
The authors present a spectral multipole algorithm that substantially reduces the number of elements that can be used in boundary element models. The memory requirements are reduced from \(O(N^2)\) to \(O(N)\) words, and the computational costs are reduced from \(O(N^2)\) to \(O(N)\) operations that are required to evaluate the element-to-element cross influences. The savings in computational speed and fast memory requirements are demonstrated in some numerical examples. Finally, the performance of the algorithm is shown on large-scale granular assembly models.

MSC:
74S15 Boundary element methods applied to problems in solid mechanics
74S30 Other numerical methods in solid mechanics (MSC2010)
74A55 Theories of friction (tribology)
74M15 Contact in solid mechanics
65N35 Spectral, collocation and related methods for boundary value problems involving PDEs
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