摘要
针对某乘用车前制动器低频尖叫问题,建立了制动系统稳定性分析有限元模型及多工况矩阵,利用复模态分析方法对该制动系统稳定性进行了分析,结果表明,系统在1830 Hz频率下出现不稳定模态,与实车制动尖叫试验结果吻合良好。采用组件贡献和模态贡献分析方法对不稳定模态进行了分析,结果显示,制动钳的一阶扭转模态和摩擦片的一阶弯曲模态贡献显著,并对制动钳和摩擦片进行了优化,仿真结果表明,制动钳结构加强后系统1830 Hz不稳定模态趋于稳定,摩擦片材料及结构调整后,系统稳定性得到改善,但仍处于不稳定区间,噪声难以消除,与试验验证结果一致,主观评价结果为可接受。
To address the issue of front brake low-frequency squeal of passenger car,a mathematical model and multi-condition matrix of stability analysis of braking system were established,and stability of the braking system was analyzed with complex mode simulation.The results show that the unstable mode appears in the system under 1830 Hz,which is in good agreement with the vehicle brake squeal test results.Components and their modal contribution analysis method were used to analyze the unstable mode.The results show that the first torsional mode of the caliper and the first bending mode of the pad are the biggest contributors to the unstable mode.The brake caliper and pad were optimized.The results show that the 1830 Hz unstable mode becomes stable after the caliper structure is strengthened,the system stability is improved after the pad material and structure adjustment,whereas it is still in the unstable interval,and the squeal is difficult to remove,which is consistent with the experimental results,and the subjective evaluation result is acceptable.
作者
杨树凯
邓建交
侯杭生
刘涛
沈远航
Yang Shukai;Deng Jianjiao;Hou Hangsheng;Liu Tao;Shen Yuanhang(Global R&D Center,China FAW Corporation Limited,Changchun 130013;National Key Laboratory of Advanced Vehicle Integration and Control,Changchun 130013)
出处
《汽车技术》
CSCD
北大核心
2024年第7期55-62,共8页
Automobile Technology
基金
国家高技术研究发展计划(7150080050)
中国第一汽车股份有限公司科技创新项目(RAJ04)。
关键词
盘式制动器
制动尖叫
复模态分析
稳定性分析
贡献分析
Disc brake system
Brake squeal
Complex modes simulation
Stability analysis
Contribution analysis
