Transient energy response high-precision prediction method for complex construction

A transient energy and complex structure technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as low prediction accuracy and narrow application range, so as to improve prediction accuracy, expand research scope, and solve transient problems. The state energy response predicts the effect of the problem

Active Publication Date: 2018-02-02
SOUTHEAST UNIV
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Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to address the deficiencies of the prior art and provide a high-precision prediction method for transient energy responses for complex structures, which solves the problems of low prediction accuracy and narrow application range of the current method

Method used

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  • Transient energy response high-precision prediction method for complex construction
  • Transient energy response high-precision prediction method for complex construction
  • Transient energy response high-precision prediction method for complex construction

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Embodiment

[0039] Embodiment: A high-precision prediction method for the transient energy response of complex structures. The complex structure fairing is selected as the analysis object. The specific operations are as follows:

[0040] (1) According to the geometric characteristics, the fairing is divided into curved panel shell 1 subsystem, curved panel shell 2 subsystem, curved panel shell 3 subsystem, cylindrical shell subsystem, flat plate subsystem, straight beam 1 subsystem, straight beam 2 subsystem Subsystem, Ring Beam Subsystem, Acoustic 1 Subsystem, Acoustic 2 Subsystem. The division of structural subsystem and acoustic cavity subsystem is as follows: figure 1 and figure 2 shown, where figure 1 The middle black solid line represents beams, including straight beam 1, straight beam 2 and ring beam located opposite to straight beam 1, figure 2 The plane where the middle gray solid line is located is the interface between acoustic cavity 1 and acoustic cavity 2.

[0041] Def...

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Abstract

The invention provides a transient energy response high-precision prediction method for a complex construction. The method comprises the steps of taking time-varying items of energy transfer among subsystems into account, establishing a transient power balance equation of all the subsystems of the structure by combining a loss factor matrix eta of a complex structure, giving an initial boundary parameter, and adopting a fourth-order-fifth-order Runge-Kutta algorithm to calculate to obtain transient energy response of all the subsystems of the structure. Compared with a traditional method whichonly takes time-varying items of energy into account, according to the transient energy response high-precision prediction method for the complex construction, the more complete transient energy balance equation of all the subsystems of the complex structure by taking the time-varying items of the energy transfer among all the subsystems of the complex structure into account, the prediction precision in transient energy response prediction of a current transient statistics energy analysis method is obviously improved, the research range of the current transient statistics energy analysis method is expanded, transient energy response analysis of structures of different coupling strengths can be solved, commercial statistics energy analysis software is combined at the same time, and the transient energy response prediction problem of the complex structure can be solved.

Description

technical field [0001] The invention relates to a statistical energy analysis method, in particular to a transient energy response prediction method. Background technique [0002] Actual engineering structures are often subjected to impact loads, such as rocket launch and stage separation, aircraft landing, ships impacted by waves, etc. The impact load has an important impact on the safe and reliable operation of the structure. Accurately predicting the dynamic response of the structure under the impact load is of great significance to engineering design. The frequency range of the impact load can reach up to 10000Hz, with obvious broadband characteristics. Due to the disadvantages of using the discretization method to analyze the dynamic response of the structure in the high-frequency band, such as high requirements on the mesh size and sensitivity to the calculation parameters, the energy method is usually used in the dynamic analysis of the structure under the action of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20G06F2111/08G06F2119/14G06F30/10G06F2111/10
Inventor 费庆国陈强李彦斌吴邵庆杨轩王攀
Owner SOUTHEAST UNIV
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