Transmission path detecting system for vehicle system structure vibration and noise

Abstract

A vehicle system structure vibration and noise transmission path detecting system belongs to the technical field of automobile design. In the invention, a vehicle system analysis model building module builds incentive related bus, vehicle structure and acoustic cavity models and sets up a vehicle system analysis model; a vibration or noise response spectrum acquiring module acquires the vehicle structure vibration or passenger indoor structure noise response analysis; a transfer path power calculating module calculates the transfer power of all transfer paths and the total power transferred to the vehicle; a main transfer path detecting module calculates and orders the contribution of all the transfer paths, and identifies the main transfer paths; an optimized design module identifies the main influential factors for transfer of the power flow of the main transfer paths, applies an optimized design method to improve relevant bus characteristic parameters and structure types, and verifies the parameters in the vehicle system or the vibration absorbing and noise reducing effect after structure improvement. The vehicle system structure vibration and noise transmission path detecting system can improve the accuracy of transfer path identification and possibility of effective control to the transfer paths.

Description

technical field [0001] The invention relates to a detection system in the technical field of automobile engineering, in particular to a transmission path detection system for structural vibration and noise of a vehicle system. Background technique [0002] With the continuous progress of modern automobile technology, automobile products are developing towards high speed and light weight, and the problem of automobile ride comfort is becoming more and more prominent. The vibration and structure noise of the vehicle system are important factors affecting the ride comfort. When the vehicle system is stimulated by the outside, it is transmitted to the body structure through the corresponding vibration isolation system or other connecting parts, and finally reaches the passenger compartment, which makes people feel the vibration and the ears are full of noise. Therefore, the essence of the structural vibration and noise problems in the passenger compartment is that the vibration...

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Problems solved by technology

In this paper, the force acting on the vibration input point of the body structure is taken as the research variable, and the velocity information of the input point is not included, the r...

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