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A High Accuracy Prediction Method for Transient Energy Response of Complex Structures

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

Active Publication Date: 2018-06-19
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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  • A High Accuracy Prediction Method for Transient Energy Response of Complex Structures
  • A High Accuracy Prediction Method for Transient Energy Response of Complex Structures
  • A High Accuracy Prediction Method for Transient Energy Response of Complex Structures

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Embodiment

[0040] 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:

[0041] (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.

[0042] Def...

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Abstract

The present invention provides a high-precision prediction method for the transient energy response of complex structures, considering the time-varying items of energy transfer between subsystems combined with the loss factor matrix η of complex structures, and establishing the transient power balance equations of each subsystem of the structure, Given the initial boundary parameters, the transient energy response of each subsystem of the structure is calculated by using the fourth-order-fifth-order Runge-Kutta algorithm; compared with the traditional method that only considers the time-varying term of energy, the present invention considers the complex structure of each subsystem The time-varying term of energy transfer between systems establishes a more complete transient energy balance equation for each subsystem of a complex structure, which significantly improves the prediction accuracy of the current transient statistical energy analysis method in the transient energy response prediction, expanding the current The research scope of the transient statistical energy analysis method can solve the transient energy response analysis of structures with different coupling strengths. At the same time, combined with commercial statistical energy analysis software, it can solve the problem of predicting the transient energy response of complex structures.

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 Patents(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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