FLEXIBLE BUS STRUCTURES OBTAINED BY THE METHOD OF STATIC CONDENSATION

Abstract

The determination of dynamic responses (accelerations, stresses) of linear systems with large number of degrees of freedom costs much work and time. Practically the same results can be obtained by using an appropriate method by which the given dynamic system can be reduced achieving less cost and time required for computation. Retaining the structure of physical model the static reduction is the most frequently applied process. Elaboration of lumped mass matrix of bus and commercial vehicle models is heuristic, therefore only the stiffness matrix of the given system is problematic. Considering the computational possibilities there are more ways to determine the stiffness matrix of a simplified modeL A reduced stiffness matrix, elaborated from the results of dynamic analysis of finite element models, is competitive from the point of view of accuracy and computational costs.