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Lightweight design method of hybrid power bus framework

A lightweight design, hybrid technology, applied in the automotive field, can solve problems such as single optimization target, and achieve the effect of improving collision safety and reducing acceleration

Inactive Publication Date: 2021-01-22
HUBEI UNIV OF AUTOMOTIVE TECH
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Problems solved by technology

[0008] In the above-mentioned patents, "A Multidisciplinary Optimization Method for Automobile Frame Based on Hyperstudy Integrated Platform" and "Lightweight Optimization Method for Automobile Frame", the two technical solutions only regard the linear working condition as the optimization response, and do not involve the collision height Non-linear working conditions, and the optimization target is single; Although the technical scheme of "A Method and System for Collaborative Optimization Design of Body and Frame Disciplines" takes into account the crash performance, it only considers the crash deformation, and does not include other related issues related to crash safety. data taken into account in the design scheme

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[0047]The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and tables, but the embodiment should not be construed as limiting the present invention.

[0048]The invention is likeFigure 1 to Figure 16 , Table 1 to Table 7 show:

[0049]The following describes a lightweight design method for a hybrid bus frame. The frame structure of the bus is a semi-bearing type, including a body frame, a frame, and a floor frame. The material used for the body frame is Q235. The material used for structural steel, frame and floor frame is Q345 structural steel (see Table 1 for material properties); the specific implementation steps are:

[0050]

[0051]S1. Establish a finite element model of the passenger car frame for optimization analysis based on CAE technology and finite element method (such asfigure 1 Shown); Among them: the unit size is set to 10mm, the vehicle is equipped with a total of 639298 units and 496238 node...

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Abstract

The invention discloses a lightweight design method of a hybrid power bus framework, which comprises the following steps of: performing static force, modal and collision analysis on the hybrid power bus framework by utilizing Hypermesh software, and screening out components with greater influence on acceleration, energy absorption, stress and modal by using a response linear main effect diagram inHyperstundy; the thickness of the component serves as a design variable, multi-objective optimization with the minimum mass and the maximum energy absorption as objectives is conducted, the optimization analysis result shows that the design method is good in optimization effect, compared with the design method before optimization, the mass is reduced by 20.94%, the energy absorption is increasedby 19.54%, the acceleration is reduced by 29.09%, light weight is achieved, and meanwhile the collision safety is effectively improved.

Description

Technical field[0001]The invention relates to the technical field of automobiles, in particular to a lightweight design method for a hybrid power bus frame.Background technique[0002]With the development of computer technology and the continuous development and improvement of technologies such as numerical analysis theory and optimization design, more advanced, accurate and efficient methods have emerged in the design of frame systems.[0003]There are currently patented multi-objective optimization design methods for automobiles:[0004]The Chinese invention patent (application number: 202010417186.6) "A Multidisciplinary Optimization Method for Automobile Frames Based on the Hyperstudy Integrated Platform" discloses that the main cross-sectional dimensions and plate thickness of the frame are used as design variables, and the modal frequency and stiffness values ​​are used as design variables The maximum principal stress is the constraint response, and the corresponding optimization me...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/23G06F111/06G06F119/14
CPCG06F30/15G06F30/23G06F2111/06G06F2119/14
Inventor 吴胜军袁威梁治千孟航宇张宗宏
Owner HUBEI UNIV OF AUTOMOTIVE TECH
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