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Electric vehicle chassis welding seam layout reliability optimization method

An optimization method and electric vehicle technology, applied in electric vehicles, design optimization/simulation, vehicle components, etc., to achieve the effects of improving load-carrying reliability, shortening development cycle, and reducing development costs

Pending Publication Date: 2022-08-05
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to realize the synergistic optimization of the electric vehicle chassis frame and weld layout, and to obtain light weight and satisfactory Optimum configuration for carrying safety and other reliability requirements

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  • Electric vehicle chassis welding seam layout reliability optimization method
  • Electric vehicle chassis welding seam layout reliability optimization method
  • Electric vehicle chassis welding seam layout reliability optimization method

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specific Embodiment approach

[0042] like figure 1 It is shown in the flow chart of the reliability optimization method of the chassis of the electric vehicle chassis of the electric vehicle chassis of the present invention, as described below:

[0043] Step 1: image 3The design domain with a definition size of 280 × 110 is defined, and the finite element model is established. The node shown in the figure is a fixed point, and the horizontal direction load is applied to the left side. * = 800kg, the global stress limit is σ * = 685MPa, the upper limit of the welding heat deformation is Dental filtration radius is r, respectively 1 = 16, R 2 = 16, R 3 = 6, R 4 = 6, frame material elastic modulus e 1 = 210GPa, Po Song Bi υ υ 1 = 0.33, weld elastic modulus e 2 = 168GPa, Po Song Bi υ υ 2 = 0.33, the maximum value β of the heaviside function max = 64.

[0044] Step 2: figure 2 Show, for the first design variable M and the second design variable n, the two -step filtering method is used to obtain the control materi...

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Abstract

The invention discloses an electric vehicle chassis welding seam layout reliability optimization method, which relates to the field of electric vehicle chassis structure design and manufacture integration, and is characterized by comprising the following steps: 1, initializing design conditions and optimization parameters; 2, carrying out unit density interpolation modeling; 3, carrying out structure global stress constraint modeling; 4, thermal deformation constraint modeling is conducted in the welding process; 5, topological optimization modeling is carried out; 6, design response solution is carried out; step 7, sensitivity analysis; 8, optimization solution is carried out; step 9, judging a convergence condition; and step 10, performing post-processing on an optimization result. According to the method, collaborative optimization of the chassis frame and the welding seam layout is achieved, under the condition that overall structure stress distribution and welding thermal deformation are considered, an optimized configuration which is light and meets the reliability requirements of bearing safety and the like is obtained, the rejection rate can be reduced, the mass production efficiency can be improved, the number of design iterations can be reduced, and the development period can be shortened. The development cost is reduced.

Description

Technical field [0001] The invention involves the integrated field of electric vehicle chassis structure design and manufacturing, and especially involves a reliability optimization method of electric vehicle chassis welding seam layout. Background technique [0002] With the increasingly prominent energy and environmental problems, electric vehicles are gradually favored by consumers due to their low pollution and low noise advantages. At present, most of the electric vehicle manufacturers adopt the "pure electric development" mode, that is, developing the body structure according to the characteristics of the three electric systems (motors, batteries, and electrical control). The battery pack is connected to the body by the mounting device, and the "mount" battery pack is only to protect the battery design. The degree of contribution to the carrier performance of the vehicle is limited, but it accounts for nearly 30 % of the weight. The further improvement of the vehicle's mile...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/15G06F119/14G06F119/08G06F119/18G06F119/02G06F111/04
CPCG06F30/23G06F30/15G06F2119/14G06F2119/08G06F2119/18G06F2119/02G06F2111/04Y02T10/40
Inventor 周明东陆宇帆王辰
Owner SHANGHAI JIAO TONG UNIV
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