Topology optimization and finite element analysis of a jet dragster engine mount

Abstract

In a jet dragster race car, the engine mount is one of the important components of an engine sub-assembly. The mounting system is the primary interface between the jet engine and the vehicle chassis, firmly containing the engine and transmitting forces to/from the engine to chassis. The jet dragster, being a high-performance vehicle, subjects its engine mount to high stresses, while requiring as low of weight as possible. The main function of the engine mount and the bracket is to properly balance the engine on the vehicle chassis and maintain its position. Strength of the mount is of high significance since it may lead to structural failure if the resulting vibration and stresses are severe and excessive, thus resulting in catastrophic consequences upon mount failure. The present work focuses on the Finite Element Analysis of an engine mount for application in a jet dragster using the FEA tool ANSYS. Static analysis, modal analysis and harmonic response analysis are carried out, by which maximum von-Misses stress and natural frequency are computed and the system’s frequency response is determined. The main objective of this study is to reduce the weight of the engine mount by suitably developing an alternate design with an optimized topology to contribute to overall weight reduction and hence enhance the vehicle’s performance and reduce manufacturing costs.

Keywords

• topology optimization
• engine mount
• fea
• structural analysis
• modal analysis