Method for calculating intermediate and high frequency dynamic response of acoustic vibration system

A technology of dynamic response and frequency dynamics, applied in computing, special data processing applications, instruments, etc., can solve complex problems that cannot be applied quickly
CN102411673AActive Publication Date: 2012-04-11NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWESTERN POLYTECHNICAL UNIV
Publication Date
2012-04-11

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Abstract

The invention provides a method for calculating the intermediate and high frequency dynamic response of an acoustic vibration system. The method comprises the following steps of: firstly dividing the acoustic vibration system to be researched into N subsystems; then, determining analysis frequency ranges to which a modal energy analysis method and a statistical energy analysis method are applicable; when the analysis frequency is in an intermediate frequency range, calculating the intermediate frequency dynamic response of the researched acoustic vibration system by adopting the modal energy analysis method; and when the analysis frequency is in a high frequency range, calculating the high frequency dynamic response of the researched acoustic vibration system by adopting the statistical energy analysis method, wherein the modal energy analysis method comprises the following steps of: firstly determining the number of resonance modes and resonance frequency values of all the subsystems in the intermediate frequency range, and then establishing a power flow balance relationship among the resonance modes of the N subsystems, and finally solving the modal energy of each mode of all the subsystems according to the power flow balance relationship, summing the modal energy of the modes of each subsystem in an analysis frequency band so as to obtain the energy response of each subsystem in the analysis frequency band.
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Description

technical field

[0001] The invention relates to the field of dynamic response analysis of the acoustic vibration system, in particular to a method for calculating the high frequency dynamic response of the acoustic vibration system. Background technique

[0002] The methods of structural dynamic response analysis can be mainly classified into two categories: analytical methods and numerical methods. The analytical method is mainly to simplify the structure to be studied into an elastic beam, flat plate, cylindrical shell or cone shell structure, and use integral transformation or modal analysis method to establish the fluid-solid coupling equation, and then solve the modal radiation sound power of the structure. Although analytical methods provide clear physical concepts during analysis, they are often not suitable for solving practical engineering problems. Because with the increase of analysis frequency or the complexity of the studied structure, the difficulty of modelin...

Claims

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