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Simplified analysis method for collision bending of thin-wall curved beam of automotive body

A technology of automobile body and analysis method, which is applied in the research of crashworthiness analysis and simplified analysis of collision and bending of thin-walled curved beams of automobile body, can solve problems such as inapplicability of calculation methods, improve simulation accuracy and calculation efficiency, and shorten design effect of cycles

Inactive Publication Date: 2014-02-05
JILIN UNIV
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Problems solved by technology

However, in the actual body structure, thin-walled beams are mostly irregular cross-sections, and the calculation method of the relationship curve between plastic hinge moment and rotation angle (M(θ)-θ) of thin-walled beams with regular cross-sections is not applicable

Method used

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  • Simplified analysis method for collision bending of thin-wall curved beam of automotive body
  • Simplified analysis method for collision bending of thin-wall curved beam of automotive body
  • Simplified analysis method for collision bending of thin-wall curved beam of automotive body

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Embodiment Construction

[0019] specific implementation plan

[0020] Below with the accompanying drawings and figure 1 The single hat section parameters shown in and the material parameters in Table 1 are taken as examples to further introduce the present invention. refer to figure 1 Create a 3D model in catia for the parameters of the single hat section shown in , and then import the model into hypermesh for model processing, mesh division, adding solder joints and other pre-processing work, refer to the material parameters in Table 1, and assign material properties. Boundary conditions and load cases for detailed finite element models see image 3 As shown, that is, the left end of the model is fully constrained, and a 500KG mass point is attached to the right end. The mass point moves along the negative direction of the X axis at an initial speed of 15m / s. Create control cards in hypermesh, such as controlling collision time, load step size, output parameters, hourglass control, contact control...

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Abstract

The invention discloses a method for establishing a simplified model for collision bending of a thin-wall curved beam of an automotive body by adopting a beam element, a nonlinear rotating spring element, a damping element and a column hinge element and belongs to the field of the design for the automotive body. The method is mainly adopted for researching the collision resistance at a conceptual phase for an automobile. According to the method, a bending moment and corner (M(Theta)-Theta) curve is evaluated for the nonlinear rotating spring element during a bending process of the thin-wall curved beam, so as to simulate the rotating features of a plastic hinge of the thin-wall curved beam during the bending process. The damping element and the column hinge element are established at a joint of the nonlinear rotating spring element, so that a correct moving relation of the model during an analysis process is ensured. The simplified analysis method for the collision bending of the thin-wall curved beam of the automotive body provided by the invention can fully meet the requirements for the research on the collision resistance at the conceptual phase for the automobile, the time for calculating a finite element model in the collision analysis of the automobile is greatly shortened and the working efficiency is increased.

Description

technical field [0001] The invention belongs to the field of automobile body design, and is mainly used for the crashworthiness analysis and research in the conceptual design stage of the automobile. In particular, the invention relates to a simplified analysis method for collision bending of a thin-walled curved beam of an automobile body. By establishing a simplified model of the thin-walled curved beam, the bending deformation characteristics of the thin-walled curved beam during the collision process can be quickly analyzed to guide the conceptual design of the car body. Background technique [0002] According to the crashworthiness analysis theory of automobile body, the bending of thin-walled beam is one of the important deformation forms in the crash analysis of automobile body. When the thin-walled curved beam collides, the failure area is concentrated in a relatively narrow area at the corner, and a plastic hinge is formed in this area. Kecman, YuCheng Liu, Xu Tao...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 徐涛郭桂凯黄贵龙邵晴李宾陈炜
Owner JILIN UNIV
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