A Prediction Method of Wind Noise in Vehicle Interior Based on Clay Model Wind Tunnel Test

Abstract

The invention discloses a method for predicting wind noise inside a vehicle based on a sludge model wind tunnel test, comprising: installing an aluminum plate at the position of the driver's side window of the sludge model of the predicted vehicle and sealing and fixing it, and setting a plurality of first acceleration sensors on the inner side of the aluminum plate , and set the first microphone on the clay model on the opposite side of the aluminum plate; set multiple second acceleration sensors inside the driver's side window glass of the competing car, and set the second microphone inside the competing car; and The doors and windows of the car are sealed; under the same working conditions, the wind noise test is carried out on the sludge model and the competing car in the wind tunnel; the acceleration signals in the sludge model are collected by multiple first acceleration sensors, and the first The microphone collects the A-weighted value of wind noise in the sludge model; the acceleration signal in the competing car is collected through multiple second acceleration sensors, and the A-weighted value of the wind noise in the competing car is collected through the second microphone; The A-weighted value of wind noise inside the car.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel tests, and particularly relates to a method for predicting wind noise in a vehicle based on an oil-sludge model wind tunnel test. Background technique [0002] With the development of highway traffic and automobile technology, high-speed driving has become a common driving condition for people, and the noise problem caused by high-speed driving cannot be ignored - automobile wind noise. The wind noise inside the car is mainly generated by the A-pillars and exterior mirrors, etc., and is introduced into the car through the window glass, body panels and gaps. The leakage noise problem can be solved by optimizing the seal in the actual vehicle stage; while in the early stage of automobile modeling development, the main research methods are through acoustic simulation and sludge model wind tunnel test, in which the simulation target is difficult to determine, and the interior noise simulation need...

AI Technical Summary

Problems solved by technology

The leakage noise problem can be solved by optimizing the seal in the actual vehicle stage; while in the early stage of automobile modeling development, the main research method is through acoustic simulation and sludge model wind tunnel test, in which the simulation target is difficult to determine, and the interior noise simulation needs to be based on The optimization process involves repeated modeling and modification, which is complex and time-consuming, and the optimization results cannot be seen intuitively; while the wind tunnel test of the traditional sludge model focuses on the noise source of wind noise, that is, the study of the external sound field, which lacks wind noise. Vibration source research, and the vibration source can better reflect the coupling effect of wind noise and vibration

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