Numerical Dynamic Analysis of the Influence of the Supports and Interconnections of Fire Engine Structural Parts

Abstract

Two superstructures are interconnected and mounted on the chassis of a fire engine. In this paper, the dynamic analysis of the behaviour of fire engine structural parts is presented. Calculations were done using the finite element method, Program package KOMIPS (author Prof. dr Taško Maneski). The models of two superstructures were done using beam and thin plate finite elements. For all variations of the stiffnesses of supports and interconnections, the dynamic behaviour was obtained. Eigen-frequencies were calculated and presented together with the appropriate amplitudes. Forced damped vibrations in frequent and time domains were calculated. Dynamic method in analysing is a very reliable method if the reconstruction of a structures is needed.