The paper presents the research of dynamic loading capacity of the tipper car body supporting structure with mathematical model methods using solid-state car dynamic model and finite-element model of the car body supporting structure. Constructive solutions are proposed for the improvement of the car body supporting structure according to the results of studies.

The analysis of dynamic loading of upper frame of dumpcar body is made. The dynamic loading, which are force on the construction in exploitation, is evaluate on the base of solid model of dumpcar body. Analysis of stress stain behavior is made with the aid of detailed plate finite element model.