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An Improved Generalized α Method for Nonlinear Dynamic Analysis of Complex Structures

A technology of nonlinear dynamics and complex structures, applied in instruments, geometric CAD, design optimization/simulation, etc., to achieve the effect of ensuring unconditional stability, avoiding the amount of calculation, and simple steps

Active Publication Date: 2021-02-12
李鲁
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  • Description
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Problems solved by technology

[0005] Aiming at the problems existing in solution efficiency when the generalized α method is used to analyze the dynamic time history of complex structures, the present invention makes two key improvements to the nonlinear iterative process of the generalized α method, and provides a method for external dynamic loads A fast analysis method for nonlinear dynamic time-history analysis of complex structures under action

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  • An Improved Generalized α Method for Nonlinear Dynamic Analysis of Complex Structures
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  • An Improved Generalized α Method for Nonlinear Dynamic Analysis of Complex Structures

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[0058] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to these specific implementations. Those skilled in the art will realize that the present invention covers all alternatives, modifications and equivalents as may be included within the scope of the claims.

[0059] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0060] Taking the nonlinear dynamic analysis of a complex high-rise building structure under the action of an earthquake as an example, the nonlinear fast dynamic time-history analysis method of the present invention is specifically described. The complex high-rise buildings such as figure 1 As shown, the first three periods of the model are T 1 =1.815s, T 2 = 1.579s and T 3 = 0.890s. The dynamic time history analysis method comprises the following steps:

[0061] The first step ...

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Abstract

The present invention relates to an improved generalized α method for nonlinear dynamic analysis of complex structures. The method is a fixed iteration number analysis method for nonlinear dynamic time history analysis of complex structures under the action of external dynamic loads. The steps are as follows: The first step is to discretize the complex structure with spatial finite elements, and establish the motion equations of the discrete system; the second step is to select parameters and determine the global invariant; the third step is to calculate by time step, and calculate the time at the end of each time step Displacement, velocity and acceleration; the present invention makes two key improvements to the nonlinear iterative process of the traditional generalized α method, greatly reduces the calculation workload and improves the calculation efficiency under the premise of ensuring the calculation accuracy.

Description

technical field [0001] The invention belongs to the technical field of structural design, and in particular relates to an improved generalized alpha method for nonlinear dynamic analysis of complex structures under the action of external dynamic loads. Background technique [0002] In recent years, complex structures have gradually increased, such as high-rise, super high-rise, long-span civil building structures, nuclear power plant reaction shells, auxiliary plant and other industrial building structures, as well as complex bridge structures such as cable-stayed bridges and suspension bridges, etc. Comprehensive "Building Structure Load Code", "Building Seismic Design Code", "Nuclear Power Plant Seismic Design Code", "Highway Bridge Wind Design Code", "Railway Bridge and Culvert Design Code", "Railway Engineering Seismic Design Code" and other specifications According to the relevant provisions of the National Standards, the above-mentioned large-scale and complex structur...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/20G06F119/14
CPCG06F30/13G06F30/20
Inventor 徐俊杰
Owner 李鲁
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