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Modeling method for discretizing plate shell structure

A technology of plate-shell structure and modeling method, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as limiting the application of active vibration control technology and complex controller design.

Inactive Publication Date: 2012-07-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the application of existing modeling methods to control systems is prone to problems such as control overflow, observation overflow, and complex controller design. Therefore, the existing modeling methods limit the application of active vibration control technology in actual engineering.

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  • Modeling method for discretizing plate shell structure
  • Modeling method for discretizing plate shell structure
  • Modeling method for discretizing plate shell structure

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specific Embodiment 1

[0054] The discretization model is established on the rectangular plate shell structure by using the method of the present invention. The structure of an ordinary rectangular plate shell is as follows figure 2 As shown; the structure of the ordinary rectangular plate shell after discretization is as follows image 3 Shown; the structure of the cantilever rectangular plate shell is shown as Figure 4 Shown; the discretized structure of the cantilever rectangular plate shell structure is shown as Figure 5 shown.

[0055] The discretized modeling method for the cantilever rectangular plate shell structure specifically includes the following steps:

[0056] Step 1: Use 9 lumped mass arrays with springs and dampers connected to represent the cantilever rectangular plate shell structure, the arrangement of the 9 lumped mass arrays is as follows Figure 5 shown.

[0057] Analysis of discrete cantilevered rectangular plate shell structures such as Figure 6 Shown: Figure 6 I...

specific Embodiment 2

[0083] The method of the present invention is used to establish a seven-point model on the circular plate shell structure. The structure of ordinary circular plate shells, such as Figure 11 As shown; the structure after discretization of the ordinary circular plate shell structure is as follows Figure 12 Shown; the structure of the cantilever circular plate shell is shown as Figure 13 Shown; the discretized structure of the cantilever circular shell structure is shown as Figure 14 shown.

[0084] The discretized modeling method of the cantilever circular plate shell structure specifically includes the following steps:

[0085] Step 1: Use 7 lumped mass arrays with springs and dampers connected to represent the cantilever circular plate shell structure, and the 6 lumped mass arrays are used as follows Figure 14 For the arrangement shown, because the mass at the center of the circular plate is fixed, no force analysis is required, so a 6-point model is established.

[...

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Abstract

The invention relates to a modeling method for discretizing plate shell structure, which belongs to the field of engineering mechanics. The modeling method for discretizing the plate shell structure includes: utilizing limited discrete lumped mass matrixes with springs and dampers to simulate vibration response of the original plate shell structure; and determining relevant parameters of the massmatrixes and rigidity matrixes by combining finite element calculation or testing results and by solving non-linear equation. Accordingly, the modeling method for discretizing the plate shell structure is simple in calculation process, practical and high in model accuracy.

Description

technical field [0001] The invention relates to a modeling method of a discretized plate and shell structure, which belongs to the field of dynamic control of engineering structures. Background technique [0002] At present, the well-known modeling methods of plate and shell structures mainly include finite element method, Rayleigh-Ritz method, etc. In the early 1950s, finite element method was first applied in the field of continuum mechanics—analysis of static and dynamic characteristics of aircraft structures , to obtain the deformation, stress, natural frequency and mode shape of the structure. Due to the effectiveness of this method, the application of finite element method has been extended from linear problems to nonlinear problems, the objects of analysis have been extended from elastic materials to plastic, viscoelastic, viscoplastic and composite materials, and from continuum to discontinuum . The Rayleigh-Ritz method is a classic numerical method widely used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 杨靖宇陈国平
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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