扭振测试—实验结果分析报告

实验结果建立的测试模型如下图，轴向为Z轴测试件共布设了个40个测点，经过敲击示波，取定分析频率5120HZ，每组实验取3次平均，圆盘夹持在不同位置处测试得到FRF频率峰值有偏移，如图000520000HZ0002000AMPLITUDEG/N000100AMPLITUDEFFRFGUANZHOU4X/GUANZHOU33YFFRFGUANZHOU8X/GUANZHOU33YFFRFGUANZHOU12X/GUANZHOU33YFFRFGUANZHOU16X/GUANZHOU33YFFRFGUANZHOU20X/GUANZHOU33YFFRFGUANZHOU24X/GUANZHOU33YFFRFGUANZHOU28X/GUANZHOU33YFFRFGUANZHOU32X/GUANZHOU33YFFRFGUANZHOU36X/GUANZHOU33YFFRFGUANZHOU40X/GUANZHOU33Y被测件的扭振模态是所关心的，因此，对每个数据点只取X、Y方向的数据，由有限元仿真结果1阶扭振频率17309HZ，2阶扭振频率33593HZ，3阶扭振频率51645HZ（超出测试设置带宽），根据测试结果取定分析频带为124004382668HZ，由实验数据得到的稳态振型图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由稳态图得到实验关心的2阶扭振固有频率如下表所列固有频率（HZ）阻尼比17531550873422175080仿真模态测试模态振型附图131E3417E3S00046000AMPLITUDEN000100AMPLITUDEFTIMEGUANZHOU33Y力信号（局部放大）000512000HZ300E3010AMPLITUDEN000100AMPLITUDEFSPECTRUMGUANZHOU33Y力信号（未加窗）频谱000512000HZ300E3010AMPLITUDEN000100AMPLITUDEFSPECTRUMGUANZHOU33Y力谱（加力指数窗）781E6160S11001000REALG000100AMPLITUDEFTIMEGUANZHOU4Z加速度（加指数窗）信号000512000HZ000017AMPLITUDEG000100AMPLITUDEFSPECTRU