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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

43

期数:

2022年02期

页码:

58-64

栏目:

出版日期:

2022-02-27

文章信息/Info

Title:

Brake Judder Analysis of Disc Brake Considering Thermal Deformation

作者:

潘公宇¹; 2; 冯雅琪¹; 陈林²; 徐宇²; 徐旗钊²

1.江苏大学汽车与交通工程学院;2.江苏恒力制动器制造有限公司;

Author(s):

PAN Gongyu¹; 2;  FENG Yaqi¹;  CHEN Lin²;  XU Yu²;  XU Qizhao²

1.School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang 212013,China; 

2.Jiangsu Hengli brake manufacturing Co., Ltd., Taizhou 214500, China

关键词:

制动抖动; 热-结构耦合仿真; 热弹性变形; 制动压力波动; 制动力矩波动

Keywords:

brake judder;  thermal-mechanical coupling simulation;  thermal deformation;  brake pressure variation;  brake torque variation

分类号:

TH212；TH213.3

DOI:

10.13705/j.issn.1671-6833.2022.02.006

文献标志码:

A

摘要:

建立了通风盘式制动器的有限元分析模型，采用热结构耦合仿真计算了制动过程中制动盘的厚度变化特性。假设制动盘与制动块间采用面接触方式建立了八自由度制动系统动力学模型，将抖动“故障盘”的初始厚薄差与热结构仿真获得的厚薄差DTV（Disc thickness variation）进行叠加并作为动力学模型仿真的输入，使用Matlab/Simuli＜x＞nk预测由于制动盘的厚度变化引起的制动压力波动BPV（Brake pressure variation）和制动力矩波动BTV（Brake torque variation），并结合试验验证了模型的有效性。然后，分别将抖动“故障盘”的实测初始厚薄差曲线与叠加厚薄差曲线作为模型的仿真输入，通过对比两种输入下的制动压力波动、制动力矩波动与试验结果的误差验证考虑热变形引起的制动盘厚度变化的改进输入的正确性。研究结果表明，采用制动盘初始厚薄差与热变形引起的厚薄差的叠加位移作为模型仿真的输入所得到的仿真结果与台架试验结果误差更小。在叠加DTV输入下，制动压力波动的仿真结果与试验结果的误差比在初始DTV输入下的误差小了8.18 %，制动力矩波动量与试验结果的误差比在初始DTV输入下的误差小了17.08 %，改进后的输入能够使制动器动力学模型在预测制动抖动方面具有更高的精确度。

Abstract:

In order to improve the prediction accuracy of brake judder by brake dynamic model, a brake dynamic model was established, in which the contact form between components and the displacement input of model were more in line with actual situation. Firstly, the finite element model of ventilated disc brake was established by using finite element software, and the disc thickness variation caused by friction heat was calculated by using thermal-structure coupling method. Then, an eight-degree-of-freedom dynamic model of brake system was established in the contact form of face to face between disc and block. At the same time, the initial disc thickness variation of brake disc with judder fault was measured by experiment. The initial thickness variation was superimposed with thickness variation obtained through thermal-structural coupling simulation, and the superimposed displacement was taken as displacement of brake block in dynamic model. The brake pressure variation and brake torque variation was predicted by dynamic simulation. Finally, the reliability of model was verified by experiments. The results showed that the error between simulation result and test result of brake pressure variation is 13.18%, and the error between simulation result and test result of brake torque variation was 11.15%.It was concluded that the superposition input of initial disc thickness variation and thickness variation generated by thermal deformation of disc could make the brake dynamic model have a good accuracy in predicting brake judder, and the brake surface contact model established could effectively predict brake judder.

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更新日期/Last Update: 2022-02-25