摘要
分析了颗粒阻尼用于鼓式制动器减振降噪的可行性,并对其阻尼特性进行了试验研究。建立某鼓式制动器的有限元模型,在考虑摩擦衬片和制动鼓之间摩擦接触的情况下,计算了当制动鼓周缘具有填装颗粒的孔洞时在制动工况下制动鼓的应力状况。向制动鼓周缘的孔洞填充不同材料、不同填充比的颗粒,通过试验获得静态下制动鼓模态阻尼比随颗粒参数的变化情况。结果表明,颗粒阻尼器可有效提高制动鼓的模态阻尼比,具有良好的减振降噪效果。
The feasibility of an application of particle damping to the noise and vibration control of a drum brake was analyzed. The characteristics of the damping were tested. An FEA model of the drum brak e was set up in which the interactive friction force between the drum and the friction pl ate was considered. The stress of the drum with some holes in its rim was calculated by ANSYS under braking conditions. Particles of different materials were filled into the holes with different packing ratios in proper order, and then the variation of the drum’s modal damping ratio with particle parameters were obtained by experimental modal analysis. The results indicate that particle damping absorber can effectively increase the modal damping ratio and can distinctly reduce the vibration and the noise.
出处
《振动．测试与诊断》
EI
CSCD
2008年第3期247-251,共5页
Journal of Vibration,Measurement & Diagnosis
基金
航空科学基金资助项目(编号:2007ZB51025)
关键词
颗粒
阻尼器
减振
制动鼓
particle dampers vibration attenuation brake drum
