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本文是以复模态理论为指导,采用以“假梯度”为核心的MB-1模态参数识别软件,对YZ-530剁锉机一点激振,X、Y、Z三个方向同时拾振的动态特性试验,利用HP5423(A)结构动态分析仪计算系统的频响函数.然后由PC9801计算机进行曲线拟合和模态参教识别.形象地演示了该机的十五阶振型,清晰地反映了该机的薄弱环节,为该机的优化设计和模态噪声的降低提供了可靠的数据.
In this paper, guided by the complex modal theory, MB-1 modal parameter identification software with “false gradient” as the core is used to pick up the vibration of the YZ-530 chopper and pick up the vibration in the three directions of X, Y and Z simultaneously The dynamic response of the system was calculated by HP5423 (A) structural dynamic analyzer.Then the PC9801 computer was used to carry out the curve fitting and modal parametric identification.It demonstrated vividly the fifteenth order mode It reflects the weakness of the aircraft and provides reliable data for the optimized design of the aircraft and the reduction of modal noise.