Simulation of three-dimensional waves for crack detection

The numerical solution of transient dynamic problems with a broad frequency range needs large systems with many degrees of freedom and time steps. This is the domain of today's powerful supercomputers. Fast algorithms and programs for dynamic problems have to be developed to make effective use of vector computers and parallel computers to get high accuracy of the numerical system with short computational time. The FD-program TransDyn, developed at the CRI, uses a fast vectorized explicit algorithm for the solution of two- and three-dimensional transient dynamic problems on supercomputers and workstations with graphic visualizations. As an example of application the vectorized program is used for realistic simulations of mechanical waves for crack detection on a Siemens S400/40. The numerical results are compared with results from photoelastic investigations. Copyright (C) 1996 Published by Elsevier Science Limited.