Abstract
Engine mounts have an important function of containing firmly the power-train components of a vehicle. Correct geometry and positioning of the mount brackets on the chassis ensures a good ride quality and performance. As an FSAE car intends to be a high performance vehicle, the brackets on the frame that support the engine undergo high static and dynamic stresses as well as huge amount of vibrations. Hence, dissipating the vibrational energy and keeping the stresses under a pre-determined level of safety should be achieved by careful designing and analysis of the mount brackets. Keeping this in mind the current paper discusses the modeling, Finite Element Analysis, Modal analysis and mass optimization of engine mount brackets for a FSAE car. As the brackets tend to undergo continuous vibrations and varying stresses, the fatigue strength and durability calculations also have been done to ensure engine safety. Keywords: FEA; Modal Analysis; Static Analysis; Optimization; Mounting Bracket
Highlights
In an automotive vehicle, the engine rests on brackets which are connected to the main-frame or the skeleton of the car
When the operating frequency or disturbance approaches the natural frequency of a body, the amplitude of Vibrations gets magnified
[2] The natural frequency of a material decreases as additional load is applied to the system or increase in mass or thickness of the material.[3]The response of ISSN 2455-0108 vibrating system can be in the form of displacement, velocity, acceleration or sound
Summary
The engine rests on brackets which are connected to the main-frame or the skeleton of the car. During its operation, the undesired vibrations generated by the engine and road roughness can get directly transmitted to the frame through the brackets. Damping of these engine vibrations becomes an important function of the mount brackets. The Noise & Vibration Harness analysis (or NVH) is one the most important considerations in automotive designing today.
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