Strength-Based Design Analysis of a Damaged Engine Mounting Bracket Designed for a Commercial Electric Vehicle (original) (raw)
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The Noise and Vibration Harshness (NVH) quality is an important customer and benchmark requirement in automotive industry products. The NVH improvement, applied in new projects, is a compromise of cost, performance and time to launch new products. The later trend has been minimized with efforts of computational simulation in the design verification phase. A precise method used for the determination of mass, center of gravity and rotational inertia, allows the engineer to simulate virtual arrangement of mounts before building prototypes. This dynamic simulation of the power train assembly extracts the first six natural frequencies and could be used for mode decoupling. All this systematic evaluations must comply with customers and design requirements. This paper describes the steps of mounting mechanical properties determination and summarizes the main tests used for evaluation of durability, certification and NVH characteristics.
The Engine in the vehicle is one of the most important components of on road vehicle such as car. High performance sports car has their engine component supported by the mounting bracket to its chassis frame. It plays a very much important role in improving the comfort & work environment of a car as well as the engine component. The improvement of the engine bracket system has been the subject of intense interest for many years. It is required to design the proper engine mounting bracket for a road vehicle. As such, the engine bracket has been designed as a frame work to support engine. Fatigue of engine mounting bracket has been continuously a concern which may lead to structural failure if the resulting stresses are high and excessive. Prolonged exposure to whole-body stresses in the working environment may lead to failure and in some cases it may damage the car. Therefore, the frequency of the bracket should be more than the engine frequency to avoid the resonance. The performance of selected materials with the help of modal analysis by using Finite element analysis