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本文通过具体实例说明广义质量贡献的概念在固有模态识别中的应用方法。用这个方法计算了大型运载器横振模态试验某状态的7个弹性振型的正交性及广义质量贡献的分布。研究表明,将本法同熟知的曲线比较法相结合是进行模态相关性研完的有效手段。用BASIC语言编制的振型正交性检查和广义质量贡献分布的计算机程序,可用于今后的模态试验。
In this paper, a concrete example is given to illustrate the application of the concept of generalized mass contribution in intrinsic mode identification. By using this method, the orthogonality of seven elastic modes and the distribution of generalized mass contribution in a certain state of large-scale vehicle transverse vibration mode test are calculated. The research shows that the combination of this law with the well-known curve comparison method is an effective way to carry out modal correlation research. A computer program written in BASIC for mode orthogonality checking and generalized mass contribution distribution can be used for future modal testing.