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A kind of local structural dynamics modeling method and device

A technology of dynamic modeling and local structure, applied in the field of dynamic modeling, can solve problems such as large amount of data, low calculation efficiency, difficult local dynamic response fine reanalysis, etc.

Active Publication Date: 2019-12-03
NORTHWESTERN POLYTECHNICAL UNIV
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  • Description
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Problems solved by technology

[0005] The embodiment of the present invention provides a local structure dynamics modeling method and device, which are used to solve the problems of large amount of data, low calculation efficiency and difficulty in fine re-analysis of local dynamic response on demand in existing dynamics modeling

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  • A kind of local structural dynamics modeling method and device
  • A kind of local structural dynamics modeling method and device
  • A kind of local structural dynamics modeling method and device

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] figure 1 A schematic flow chart of a local structural dynamics modeling method provided by an embodiment of the present invention, as shown in figure 1 As shown, the embodiment of the present invention provides a local structural dynamics modeling method which mainly includes the following steps:

[0050] Step 101, dividing the overall structure into a first structure and a second structure according to the structure distribution, wherein the second st...

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Abstract

The invention provides a local structural dynamical modeling method and a device. The method is adopted for solving the problems of big data volume, low calculation efficiency and difficulty in locally dynamical responding and finely analyzing as required of the present dynamical modeling. The method comprises the following steps: dividing a whole structure into a first structure and a second structure; establishing an interface multipoint restriction equation for the first structure under the first grid and the second structure under the second grid according to the finite element stiffness matrix and mass matrix of the first structure and the finite element stiffness matrix and mass matrix of the second structure; confirming a vibration mode of the first structure and a vibration mode of the second structure according to the equation; and confirming a deformation compatibility matrix between the DOF (Degree of Freedom) modal displacement of the first structure and the DOF modal displacement of the second structure according to a Moore-Penrose pseudo-inverse method, thereby confirming a dynamical equivalent support effect matrix of the second structure and a fine dynamical finite element model of the first structure.

Description

technical field [0001] The invention belongs to the field of dynamic modeling, and in particular relates to a local structure dynamic modeling method and device. Background technique [0002] Engineering practice shows that the vibration fatigue damage of the structure occurs in a certain local area of ​​the overall structure, that is, the local structure. Therefore, in order to accurately predict the vibration fatigue life of the structure, it is necessary to improve the calculation accuracy of the dynamic stress of the local structure. [0003] In practical applications, if the dynamic finite element model of the overall structure is directly established for simulation calculation, since the accurate calculation of the dynamic stress at the local structure requires fine grid division, the scale of the established dynamic model will be too large, seriously It affects the efficiency of finite element analysis, and even makes the analysis impossible; the overall / local analysi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 李斌卞鑫杨智春牛文超
Owner NORTHWESTERN POLYTECHNICAL UNIV
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