Experimental and Numerical Modal Analysis of the Military Vehicle Hull

Z Hryciów,P Rybak,A Wiśniewski

doi:10.3849/aimt.01427

Z Hryciów, P Rybak + Show 1 more

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https://doi.org/10.3849/aimt.01427

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Abstract

This paper presents an experimental and numerical modal analysis of the military vehicle hull. Due to its adaptation to various weapon systems, it is necessary to conduct detailed tests. Computer simulations are a very useful tool. To ensure the reliability of the results, it is necessary to validate the models. The modal analysis was used in this work. It was carried out using the roving hammer method. Both natural frequency and mode shape were compared. The Modal Assurance Criterion was used for the comparison. To determine areas of noncompliance, distributions of relative differences between experimental and finite element (FE) mode shapes were prepared. The presented results indicate a large convergence between the results of numerical and experimental analyses.

Highlights

Modern armoured vehicles, especially for special purposes, play different roles on the battlefield
In order to compare a similarity between the mode shape obtained during numerical simulation, an autoMAC analysis was carried out (MAC analysis within a single mode set)
In the case of vibrations of a single element, an autoMAC takes the form of a diagonal matrix

Summary

Introduction

Especially for special purposes, play different roles on the battlefield. Their design, equipment and performance are determined by the intended purpose. Armoured vehicles can be used as infantry carriers, direct fire support vehicles, reconnaissance vehicles, technical recovery vehicles and others. During their construction, modular conception is used which enables the implementation of versions adapted to various tasks. The universality of the structure brings additional requirements that must be met by the base structure. Various applications / installed weapon systems generate different values of loading to a hull, suspension, running gear and propulsion systems

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