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Brake squeal prediction method of considering thermal-mechanical coupling effect

A technology of thermal-mechanical coupling and prediction method, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of complex squeal effects, braking squeal effects, and no clear relationship between temperature and squeal. To achieve the effect of ensuring accuracy, improving accuracy and improving accuracy

Active Publication Date: 2018-02-16
TONGJI UNIV
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Problems solved by technology

The above series of changes will cause changes in the structural characteristic factors and friction pair characteristic factors of the brake, which may affect the brake squeal
In the previous research on brake squeal test, the influence of temperature on brake squeal has been studied, but the influence of temperature on squeal is very complicated, and a clear relationship between temperature and squeal has not been found

Method used

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  • Brake squeal prediction method of considering thermal-mechanical coupling effect
  • Brake squeal prediction method of considering thermal-mechanical coupling effect
  • Brake squeal prediction method of considering thermal-mechanical coupling effect

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Embodiment

[0045] A brake squeal analysis method considering the thermal-mechanical coupling effect, the overall process is as follows figure 1 shown, including the following steps:

[0046] Step 1: If figure 2 As shown, the assembly model of the ventilated disc brake system is established by using the 3D modeling software. Clamp refers to the composition of rigid surfaces. And ignore the small structures such as the grinding relief groove on the surface of the brake disc and the back plate of the brake block, the small boss of the hub and the chamfer;

[0047] Step 2: Perform a free modal test. In order to extract the out-of-plane modal parameters of the brake disc, the method of single-point excitation and 14-point pickup test in the Y direction is adopted. The layout of the pickup sensors is 14 uniformly distributed unidirectional acceleration sensors in the circumferential direction. The brake disc under test adopts a rubber rope suspension installation method, and the suspensio...

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Abstract

The invention relates to a brake squeal prediction method of considering a thermal-mechanical coupling effect. The method includes the following steps: A, establishing a finite element model of free modal analysis of key parts; B, carrying out free modal testing and comparison of the key parts; C, establishing a finite element model of complex modal analysis of a brake; D, carrying out model working-condition squeal testing of the brake under a low-temperature working condition; E, carrying out model correction based on testing data of the low-temperature working condition; F, carrying out thermal-mechanical coupling modeling and analysis; G, carrying out boundary condition extraction and analysis; H, carrying out model working-condition squeal testing of the brake under a high-temperatureworking condition; I, carrying out model correction based on testing data of the high-temperature working condition; and J, carrying out different-temperature squeal frequency prediction. Compared with the prior art, the method helps to improve precision of brake squeal prediction, can particularly predict high-frequency noises of the automobile brake under the high-temperature working condition,and can reflect time-varying features of a brake squeal tendency caused by the thermal-mechanical coupling effect.

Description

technical field [0001] The invention relates to the field of brake squeal of automobile brakes, in particular to a brake squeal prediction method considering thermal-mechanical coupling effect. Background technique [0002] Automobile brakes are components in the braking system that are used to generate force that hinders vehicle movement or movement tendency. Its performance and stability have a crucial impact on driving safety. When the car brakes, whether it is a drum brake or a disc brake, it will vibrate and may cause serious noise. Brake noise seriously affects the comfort of the occupants, and reduces the life of the relevant parts, and may even cause early damage to the parts. Furthermore, in recent years, new materials with low damping and high temperature resistance have replaced asbestos as the main material of friction linings, and the trend of lightweight automobile structures has changed the characteristics of braking noise and vibration, making the problem of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/23
Inventor 孟德建张立军张状李文博余卓平
Owner TONGJI UNIV
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