基于Workbench的盘式制动器振动噪声分析与优化
Analysis and optimization of vibration noise of disc brakes based on Workbench
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摘要: 针对汽车制动噪声较大的问题,以某电动汽车盘式制动器为研究对象,用Soildworks软件建立制动器的三维模型,在Workbench平台对该模型进行复模态分析,得出制动时振动与噪音的分布情况,并通过制动块切斜倒角、中间挖凹槽、在钢背面铆接消音片等措施对刹车片结构进行优化,最后使用Dynamometer-GIANT 8600惯性试验台对改进前后的制动器进行NVH性能测试.结果表明:摩擦因数越低,制动器复特征值实部值越小,系统越稳定;改进后的制动器可以有效地减少系统不稳定模态的频率,使得汽车在低速时制动噪音明显减少,制动器NVH性能得到显著改善.
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关键词:
- 盘式制动器 /
- Workbench平台 /
- 复模态分析 /
- 摩擦因数 /
- NVH试验
Abstract: In order to solve the problem of loud noise of automobile braking, taking a certain electric vehicle disc brake was the research object, a 3D model of the brake was established by using Soildworks software, and the model was analyzed by complex modal analysis on Workbench platform, and the distribution of vibration and noise during braking was obtained. The structure of the brake pad was optimized by means of chamfered, digging grooves in the middle and riveting the shim in the steel back. Finally, the NVH performance test of the brake before and after the improvement carried out using the Dynamometer-GIANT 8600 inertia test bench. The experimental results showed that the lower the friction coefficient,the smaller the real part value of the complex eigenvalue of the brake, and more stable the system. The improved brake could effectively reduce the frequency of the unstable modes of the system, so that the braking noise of the vehicle was significantly reduced at low speed, and the NVH performance of the brake was significantly improved.-
Key words:
- disc brake /
- Workbench platform /
- complex modal analysis /
- friction coefficient /
- NVH test
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