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Design method of multi-component thin-wall beam structure considering manufacturing cost

A manufacturing cost and structural design technology, applied in the field of multi-component thin-walled beam structure design, can solve the problems of poor manufacturability of thin-walled beams, poor economical and process feasibility, complex shape of single-component thin-walled beams, etc., and achieve the goal of improving economic benefits Effect

Active Publication Date: 2022-07-15
JILIN UNIV
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problem that the existing single-component thin-walled beams designed by the topology optimization method are relatively complicated in structure and shape, which makes their economical products and process feasibility poor, resulting in poor manufacturability of the thin-walled beams. A design method for multi-component thin-walled beam structures considering manufacturing cost

Method used

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  • Design method of multi-component thin-wall beam structure considering manufacturing cost
  • Design method of multi-component thin-wall beam structure considering manufacturing cost
  • Design method of multi-component thin-wall beam structure considering manufacturing cost

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Embodiment

[0175] Example: An example is given below to verify the effectiveness of this method

[0176] Based on the design method described in the specification, the present invention writes a program code for the optimal design of a multi-component thin-wall beam structure in MATLAB. We use the present invention to solve the thin-walled beam under the condition of the cantilever beam loaded at the lower end, and finally obtain the thin-walled beam structure in the form of multiple components.

[0177] First, establish a thin-walled beam structure with a geometric size of 10×10×10, a hollow square hole with a diameter of 6×6, an elastic modulus unit of 1, a Poisson’s ratio of 0.3, the preset number of components is set to K=3, and the volume constraint limit is set V * Set to 0.5, part material cost limit Volume (k) set to 10 9 , the initial values ​​of the element density ρ and the component specific gravity fraction m are respectively set as the volume constraint limit V * and 1 / ...

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Abstract

The invention relates to a thin-walled beam design method, aiming at the problems of complex shape, poor economical and technological feasibility, and poor manufacturability of the existing single-component thin-walled beam structure designed by using the topology optimization method, and a multi-component thin-walled beam structure considering the manufacturing cost. Design method; including: 1. Establishing the initial design space finite element model of the multi-component thin-walled beam; 2. Establishing the multi-component thin-walled beam multiphase penalty material interpolation model; 3. Determining the multi-component thin-walled beam structure optimization goal; 4. Establishing the multi-component thin-walled beam Material cost constraints of thin-walled beam parts; 5. Establish a multi-component thin-walled beam topology optimization model considering manufacturing cost constraints; the present invention takes into account manufacturing constraints in the topology optimization process and realizes multi-component structure decomposition in the topology optimization process, improving topology optimization. The economic benefits brought by and the feasibility of the optimization scheme.

Description

technical field [0001] The present invention relates to a method for structural design of thin-walled beams, more specifically, the present invention relates to a method for structural design of thin-walled beams in multi-component form considering manufacturing cost. Background technique [0002] In recent years, with the increasingly severe form of energy crisis and environmental protection, the requirements for the lightweight of automobiles have been further improved. A well-designed body structure can maximize the performance of automobiles while ensuring lightweight. Thin-walled beams are the most widely used structures in automobile bodies, and the ability to design a reasonable thin-walled beam structure directly affects the performance and lightweight of the vehicle. [0003] Structural optimization design is a method of optimizing certain structural parameters to obtain the best design solution under one or more constraints. This method can find the best balance p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F30/23
Inventor 张君媛王世航周浩舒畅王坚宁立男刘丰
Owner JILIN UNIV
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