Apparatus and method for performing uncorrelated multisource frequency domain load identification in complicated sound vibration simulation experiment environment

Abstract

The invention relates to a test apparatus and method for uncorrelated sound vibration load combination application and uncorrelated multisource frequency domain load identification, and three methods for performing uncorrelated multisource frequency domain load identification in a complicated sound vibration simulation environment by utilizing the apparatus. The three methods are a general-reversion-of-least-square method, an improved regularization method and a multi-input multi-output support vector regression method respectively. The three methods are all capable of identifying the values of a plurality of uncorrelated frequency domain load sources at the same time according to vibration responses of a plurality of test points. The general-reversion-of-least-square method does not need to measure a phase of a transfer function; each frequency corresponding to the improved regularization method has an optimal regularization parameter; and the multi-input multi-output support vector regression method is capable of effectively avoiding the over-learning phenomenon.

Description

technical field [0001] The invention relates to a test device and method for joint application of uncorrelated acoustic-vibration loads and uncorrelated multi-source frequency-domain load identification research, and using the device to identify uncorrelated multi-source frequency-domain loads in a complex acoustic-vibration simulation environment The three methods are the least squares generalized inverse method, the improved regularization method and the multi-input multi-output support vector regression method. The three methods can simultaneously identify multiple The magnitude of the uncorrelated frequency-domain loading source. Background technique [0002] In actual engineering, it is difficult to directly measure or calculate the external load acting on the structure when missiles are flying in the air, large buildings such as ocean platforms are stimulated by wind, waves and traffic, and sometimes even the point of action of the load cannot be reached. , making thi...

AI Technical Summary

Problems solved by technology

Among them, the frequency domain method was proposed earlier, and it is mainly realized by inverting the frequency response function between the excitation and the response. However, the matrix inversion method usually needs to solve the generalized inverse when it is applied, and it often encounters ill-conditioned problems and singularity of the coefficient matrix. value decomposition problem

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