Wave Propagation in Elastic Trusses: An Approach via Retarded Potentials

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We propose a space–time boundary element method for the dynamic simulation of elastic truss systems. The considered truss systems consist of several members, where in each elastic rod the dynamic behaviour is governed by the 1D wave equation. The time domain fundamental solution and boundary integral equations are used to establish the dynamic Dirichlet-to-Neumann map for a single rod. Thus, we are able to reduce the problem to the nodes of the truss system and therefore only a temporal discretization at the truss nodes is necessary. We introduce a stepwise solution strategy with local step size which ensures stability. Furthermore, the discretization within each of these time steps can be refined adaptively to reduce the approximation error efficiently. The optimal convergence of the method is demonstrated in numerical examples. Due to adaptive refinement, this optimal convergence rate is retained even for non-smooth solutions. Finally, the method is applied to study typical truss systems.

Original languageEnglish
Pages (from-to)37-57
Number of pages21
JournalWave Motion
Volume87
DOIs
Publication statusPublished - 2019

Fingerprint

trusses
Trusses
Wave propagation
Wave Propagation
wave propagation
Boundary integral equations
rods
Wave equations
Boundary element method
Discretization
boundary element method
Dirichlet-to-Neumann Map
Adaptive Refinement
Elastic Rods
Optimal Convergence Rate
wave equations
integral equations
Computer simulation
Approximation Error
Boundary Integral Equations

Keywords

  • Adaptive mesh refinement
  • Boundary integral equation
  • Dirichlet-to-Neumann map
  • Stability
  • Wave equation

ASJC Scopus subject areas

  • Computational Mathematics
  • Physics and Astronomy(all)
  • Applied Mathematics
  • Modelling and Simulation

Fields of Expertise

  • Information, Communication & Computing

Cite this

Wave Propagation in Elastic Trusses: An Approach via Retarded Potentials. / Pölz, Dominik; Gfrerer, Michael Helmut; Schanz, Martin.

In: Wave Motion, Vol. 87, 2019, p. 37-57.

Research output: Contribution to journalArticleResearchpeer-review

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