摘要
为了研究在工作状态下制动器摩擦片发生磨损后的制动噪音问题,建立了均匀磨损和不均匀磨损两种有限元模型。通过热-结构耦合模块的仿真分析,得到均匀磨损和不均匀磨损两种状态在不同磨损量时的模态分布与振型,求出了各阶固有频率。采用复特征值法求出了系统不稳定模态下的不稳定系数。研究结果表明,两种磨损状态均对制动器系统的稳定性有一定影响,随着磨损量的增大,制动器的固有频率呈下降趋势,均匀磨损状态下不稳定模态的数值略有增加,不均匀磨损状态下不稳定模态的数值上升趋势明显,发生制动噪声的倾向显著增加。通过分析不均匀磨损产生的原因,提出了相应的改进方法,为制动器系统的进一步优化提供了理论依据。
In order to study the brake noise problem after the friction plate of the brake is worn under the working condition,two finite element models of uniform wear and uneven wear are established.Through the simulation analysis of the thermal structure coupling module,the distribution mode and vibration mode of the two states under different wear amount are obtained.Then their natural frequencies are obtained.The instability coefficient of the system in unstable mode is obtained by complex eigenvalue method.Both wear states have a certain influence on the stability of the brake system.When the wear increases,the natural frequency of the brake tends to decline,the value of unstable mode increases slightly in uniform wear state but remarkably in the uneven wear state,and the tendency of brake noise increases significantly.By analyzing the causes of uneven wear,the corresponding improvement methods are put forward,which provides a theoretical basis for the further optimization of brake system.
作者
张雪松
王兆恒
ZHANG Xuesong;WANG Zhaoheng(School of Mechanical and Electronic Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China;Department of Mechanical Engineering,Zhengzhou University of Economics and Business,Zhengzhou 451191,China)
出处
《中原工学院学报》
CAS
2021年第3期46-52,共7页
Journal of Zhongyuan University of Technology
基金
河南省高等学校重点科研项目(21B460023)。
