Technique solution of the problem of the pipeline precast structure frequency response search with application of the finite element method

Modification of technique of structural design of pipeline system taking into account experimental data of a strain- gage testing has been completed. The various ranges of frequency response analysis of the dynamically loaded hydrogas system’s collapsible pipelines constructions with application of a finite element method nonlinear contact problem has been done. Frequency responses of collapsible pipelines constructions hydraulic system pressure line of a modern airplane before and after modernization on the presented method are presented; decrease of structures dynamic stresses in the operating frequency range. This work continues research of dependence of frequencies of natural vibration and tensely deformed condition ofpipeline systems from features of its detail of construction.