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  1. Automotive engine bracket Automobile engine bracket is a safe and functional part of powertrain mounting system. It must satisfy the strength of automobile under various driving conditions and the restraint mode of mounting bracket has a great influence on the noise inside the vehicle. If the design is unreasonable, the natural frequency of the mounting bracket I is too low and in the range of engine operating speed, the mounting bracket will produce resonance, which will increase the noise inside the vehicle. Therefore, modal is one of the important design indexes of mounting bracket. Taking the four-cylinder engine of passenger car as an example, according to the resonance theory, it is required that the natural frequency of the engine mounting bracket should be greater than 500 Hz, and the lowest should be greater than 400 Hz. In fact, due to the limitation of the layout space, the above requirements can not be met. The first order natural frequency should be increased as much as possible. Feilong Jiangli,40 years specialize in engine bracket, through the optimization design and modal analysis of the suspension bracket practice, summed up to improve the modal method, to provide a theoretical basis for design.
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