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本文利用识别得的非完整复模态参数来修正结构动力模型,使修正模型在要求的频率范围内与测试的动力特性一致.在文中应用Jacobi变换来约束修正质量阵与刚度阵的带宽,使[M]与[K]保持原来带宽不变,并应用Kuhar动力凝聚及扩充“虚拟测点”的方法来解决实际测试中测点不足的矛盾,通过计算机仿真分析及试验模型的计算,证实修正效果良好,能适用于非比例阻尼情况.
This paper uses the identified non-holonomic complex modal parameters to modify the structural dynamic model so that the modified model is consistent with the dynamic characteristics of the test within the required frequency range. The Jacobi transform is used in the paper to constrain the bandwidth of the modified mass matrix and the stiffness matrix so that [M] and [K] keep the original bandwidth unchanged, and apply Kuhar dynamic aggregation and expansion of “virtual measuring points” to solve the problem of insufficient measurement points in actual tests. Through computer simulation analysis and calculation of experimental models, verification is confirmed. The effect is good and can be applied to non-proportional damping situations.