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Load controllable transmission structure topological optimization method based on geometric nonlinearity

A geometric nonlinear and topology optimization technology, applied in geometric CAD, design optimization/simulation, special data processing applications, etc., can solve problems such as poor practicability, and achieve modeling with good practicability, high flexibility, and optimization constraints. Effect

Inactive Publication Date: 2017-05-17
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] In order to overcome the shortcomings of poor practicability of existing topology optimization methods for load controllable transfer structures, the present invention provides a topology optimization method for load controllable transfer structures based on geometric nonlinearity

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  • Load controllable transmission structure topological optimization method based on geometric nonlinearity
  • Load controllable transmission structure topological optimization method based on geometric nonlinearity
  • Load controllable transmission structure topological optimization method based on geometric nonlinearity

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Embodiment Construction

[0022] refer to Figure 1-6 . The specific steps of the topology optimization method of the load controllable transfer structure based on the geometric nonlinearity of the present invention are as follows:

[0023] The present invention is described by taking a rectangular flat plate as an example. The dimension of the topological design domain 1 of the two-dimensional connection structure is 100mm×30mm×1mm, Young’s modulus E=3000Mpa, Poisson’s ratio μ=0.4. The concentrated force of F=250N acts vertically downward on the upper left corner of the structure, the upper rectangular plate is the topological design area, and four support positions are distributed at the bottom, two of which are required to be C 2 、D 2 The ratio of the vertical reaction force provided to the system is 1:1. The additional rod units at C and D support positions are denoted as C respectively 1 C 2 、D 1 D. 2 , in order to realize the controllable transmission of the load along the vertical direct...

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Abstract

The invention discloses a load controllable transmission structure topological optimization method based on geometric nonlinearity. The method is used for solving the technical problem that an existing load controllable transmission structure topological optimization method is poor in practicability. According to the technical scheme, the method comprises the steps that firstly, an auxiliary rod unit is added, constraint node loads are converted into constraint node displacement, and then load controllable transmission is achieved through the ratio of constraint node displacement, so that load controllable transmission can be achieved in geometric nonlinearity topological optimization, the technical problem that in the prior art, only the integral rigidity performance is considered and the structural partial performance is neglected in geometric nonlinearity topological optimization is solved, meanwhile, constraint modeling optimization and rapid model modification are promoted, and the method has the high flexibility, universality and accuracy and the good practicability.

Description

technical field [0001] The invention relates to a topology optimization method for a controllable load transfer structure, in particular to a topology optimization method for a controllable load transfer structure based on geometric nonlinearity. Background technique [0002] When the external load on the aircraft structure exceeds a certain range, the structure will undergo large deformation, which brings challenges to the traditional aircraft structure design. At the same time, in the process of aircraft structural design, it should be ensured that the structure has sufficient strength and rigidity under various specified load states, and that the load-bearing structures coordinate with each other, so as to ensure the reasonable transfer of loads within the structure. Taking the aircraft wing as an example, due to the large aspect ratio of the wing, large nonlinear deformation will occur when it is loaded. Complete various aerial maneuvers. Therefore, in the design of th...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/23
Inventor 朱继宏曹吟锋候杰王杰张卫红
Owner NORTHWESTERN POLYTECHNICAL UNIV
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