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给简单的梁-质量运载器及有效载荷模型分别施加瞬态激励力,研究结构接合面和其他相应点的复导纳函数。然后,用矩阵表达式把这些测得的导纳以解析方式组合起来,对耦合系统的动态特性作出描述。预示有效载荷模型对运载器模型激励的响应,并将结果与在组合模型上测得的结果作了比较。还把这些结果与早期的研究结果作了比较,在早期的研究中,除了用稳态正弦激励法这一点之外,其余均采用与本方法类似的过程。总的说来,用瞬态试验法得到的结果比稳态法的好。而且,完成同样的试验,瞬态法所需的时间要少得多,还能提供更高的数据分辨率。然而,这种方法的数据收集和处理问题更为复杂。可以认为,瞬态试验和导纳矩阵预示法会是研究有效载荷振动试验的一个有价值的方法。文章最后给出进一步改进这一方法的建议。
The transient excitation force is applied to the simple beam-mass carrier and payload model respectively to study the complex admittance function of the structural joint and other corresponding points. Then, these measured admittances are assembled analytically using matrix expressions to describe the dynamic behavior of the coupling system. Predict the response of the payload model to the vehicle model excitation and compare the results with the results measured on the combined model. These results are also compared with those of earlier studies. In earlier studies, similar procedures to the present method were used except for using steady state sinusoidal excitation. In general, the results obtained by the transient test are better than the steady-state method. And, to do the same experiment, the transient method takes much less time and provides higher data resolution. However, the data collection and processing problems of this method are more complex. It is believed that transient tests and admittance matrix predictions will be a valuable way to study payload vibration tests. Finally, the article gives suggestions for further improvement of this method.