不规则截面制动蹄的鼓式制动器制动尖叫的研究
图15.(a)噪声测试器测试的图片以及(b)后轮连接的鼓式制动器放大图片。
表5.噪声测试器测试结果 测试序号
1 2 3 4
制动蹄类型 原始制动蹄 原始制动蹄 修改后的制动蹄 修改后的制动蹄
噪声比率
噪声索引
(%) 0.25 0.23 0.00 0.00
备注 没有超过噪声限制 超过噪声限制 No squeal occurred No squeal occurred
0.31 4.00 0.00 0.00
不规则截面制动蹄的鼓式制动器制动尖叫的研究
图16.噪声测试器测试中测量的鼓式制动器噪声声谱：(a)原始制动蹄出现3.1kHz尖叫；(b)修改过后的制动
蹄没有尖叫出现
从表5中我们可以看出相对于原始的制动蹄用修改后制动蹄的鼓式制动器基本上没有尖叫。图16显示了使用原始或修改过后制动蹄的鼓式制动器噪声声谱；除了3.1kHz波峰的的另外一条谱线是环境噪声。通过以上结果，部分修改网络可以有效减少尖叫产生。
7.结论
在本文中，对于应用不规则截面制动蹄鼓式制动器来减少制动尖叫进行了理论分析，还对制动器设计参数对制动尖叫的影响进行了研究。
所有的这些结果都显示了尖叫可以由改变制动器组件的动态特性来抑制。对于制动蹄，可以增加横截面积，降低制动蹄弯曲刚度来减少鼓式制动器制动尖叫。尽管他们不能同时进行，但是一个有效的修改方法是通过张力能量分配尽可能的降低制动蹄的弯曲刚度而较少的减少横截面积。通过这个方法，对于截面较小的修改，通过理论分析和噪声测试器测试证明，可以达到很有效的效果。于是，可以推断甚至对于制动蹄一个很小的改变就可以对降低尖叫产生很大的效果。
最后，制动鼓的不对称产生的影响考虑了不稳定性与波动的联系进行了研究。
不规则截面制动蹄的鼓式制动器制动尖叫的研究
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