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介绍了对Y112M-4型电动机机座进行试验模态分析的情祝。论述了用时域复指数法求取模态频率、阻尼和用频域最小二乘法求取模态振型的基本原理及试验方法。并对试验结果进行了分析,提出了从结构特性方面减少振动传递、降低噪声的两个具体措施。
This paper introduced the test modal analysis of Y112M-4 motor base. The basic principle and experimental method of finding modal frequency by modal exponent in time domain, damping and finding the modal shape by the method of least squares in frequency domain are discussed. The experimental results are analyzed and two concrete measures are proposed to reduce the vibration transmission and reduce the noise from the structural characteristics.