In-vehicle low-noise optimization design method and system

Abstract

The invention discloses an in-vehicle low-noise optimization design method and system, and the method comprises the steps of inputting the sound reduction indexes TLi of different regions of a to-be-designed vehicle and the sound power Lwj of sound source equipment into an in-vehicle noise simulation prediction analysis model, and carrying out the in-vehicle noise simulation prediction analysis ofthe to-be-designed vehicle through employing an initial sound reduction index and initial sound power under a preset constraint condition; and iteratively carrying out noise prediction based on the in-vehicle noise simulation prediction analysis model until a noise prediction value Lpsi meeting the minimum in-vehicle noise reduction total cost amount is output, and obtaining design parameters used for constructing different areas of the to-be-designed vehicle and sound source equipment used for predicting the noise prediction value Lpsi to design the vehicle; performing noise prediction through iteration based on an in-vehicle noise simulation prediction analysis model. It is ensured that an unbiased noise prediction value Lpsi is obtained at the lowest in-vehicle noise reduction total cost, and the in-vehicle noise optimization design method is short in period, low in cost and free of deviation. In addition, based on the method, vehicle design does not need to be conducted through subjective experience of personnel, and therefore subjectivity does not exist.

Description

technical field [0001] The invention relates to the technical field of acoustic simulation, in particular to a low-noise optimization design method and system in a vehicle. Background technique [0002] With the rapid development of my country's rail transit trains, the noise problem of rail transit trains has become increasingly prominent. The train noise problem of rail transit usually includes the noise problem outside the train and the noise problem inside the train. [0003] The existing research on the noise of rail transit trains is mainly divided into two kinds of experimental analysis methods and numerical simulation analysis methods. In the process of using the experimental analysis method to control the noise in the car and improve the acoustic environment in the car, it is necessary to go through many attempts and repeated tests to achieve the purpose of optimizing the noise in the car. However, this experimental analysis method has the problems of long period ...

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Problems solved by technology

[0005] In view of this, the embodiment of the present invention provides a low-noise optimization design method and system in the vehicle to solve the problems of long cycle, high cost, strong subjectivity and prone to deviation in the existing optimization of vehicle interior noise

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