WIT Press


A BEM-formulation Applied To The Solution Of Nonlinear Dynamic Problems

Price

Free (open access)

Paper DOI

10.2495/BE980291

Volume

21

Pages

10

Published

1998

Size

859 kb

Author(s)

H.J. Holl, A.K. Belyaev & H. Irschik

Abstract

A semi-analytical time-integration procedure is presented for the integration of discretized dynamic mechanical systems. This method utilizes the advantages of the boundary element method, well known from quasi-static field problems Motivated by these spatial formulations, the present dynamic method is based on influence functions in time, and gives exact solutions in the linear time-invariant case. Similar to domain-type BEM's for nonlinear field problems, the method is extended for different nonlinear dynamic systems having nonclassical damping The numerical stability and accuracy of the semi-analytical method is discussed in two steps for the nonclassical damping and for the nonlinear restoring forces The Duffing oscillator and a system with nonclass

Keywords