DEVELOPMENT AND VERIFICATION OF NON-STATIONARY FINITE ELEMENT MODEL FOR THE STUDY OF WAVE PROCESSES IN THE PIPELINE
The paper presents a computer FEA-model to simulate the pattern of elastic wave propagation in the pipe wall, excited to test the pipe for damage. Possible ways to verify the finite element dynamic model for the problems of the mechanics of deformable solid are demonstrated. The possibilities of the developed model for visualization of wave processes in the pipeline, determine the trajectory of the wave fronts in the design are shown. On the basis of the proposed model is numerically solved the problem of propagation of longitudinal vibrations of a rod and the development of wave process in the pipe wall due to external impulses. In characteristic points of the structure, the dynamic response of the system to external perturbations is defined.