High-rigidity and light-weight sensitivity analysis method for passenger bus skeleton

A sensitivity analysis, high stiffness technology, applied in the field of high stiffness and lightweight sensitivity analysis of bus body frame, can solve problems such as large amount of calculation, calculation error, inability to reduce body mass, etc., to improve stiffness, reduce calculation amount, and reduce body weight quality effect

Active Publication Date: 2014-05-28
JILIN UNIV
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Problems solved by technology

In the traditional parametric modeling of the bus frame, each beam structure is matched with a set of independent section geometric parameters. The design method is to calculate the derivative of the static and dynamic stiffness with respect to the section size parameters, which can only increase the body stiffness

Method used

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  • High-rigidity and light-weight sensitivity analysis method for passenger bus skeleton
  • High-rigidity and light-weight sensitivity analysis method for passenger bus skeleton
  • High-rigidity and light-weight sensitivity analysis method for passenger bus skeleton

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Experimental program
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Embodiment Construction

[0022] (1) Establish a parametric finite element model of the bus skeleton structure

[0023] figure 1 It is a box-section pipe, and the basic size parameters of its section are height h, width b, and thickness t. use figure 1 The Euler-Bernoul finite element beam element shown builds up figure 2 The finite element parametric model of the bus body skeleton is shown. The model simplifies the bus body and omits the skin structure. The model is divided into five major assemblies of front wall, rear wall, side wall, top cover and underframe, and is divided into 12 components in total. All beam elements in each component have the same cross-sectional size, so the body is a component parametric model.

[0024] In order to more accurately simulate the actual working conditions of the bus, the establishment image 3 Suspension model shown, assemble it on figure 2 In the vehicle model shown. A flexible beam structure is used to simulate the leaf spring, the width b of the beam...

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Abstract

The invention relates to a high-rigidity and light-weight sensitivity analysis method for a passenger bus skeleton and belongs to the field of design of a passenger bus body. The method comprises the steps of parameterization assembly modeling of a passenger bus skeleton structure, static and dynamic rigidity defining and sensitivity analysis of the static and dynamic rigidity on the whole bus weight. The method is different from other rigidity and sensitivity analysis methods on the other bus body structures; the static and dynamic rigidity sensitivity of the method is the derivative of the whole bus weight, the bus body weight is reduced while the rigidity is increased and the light weight target is realized; in the traditional method, the static and dynamic rigidity is subjected to differentiation for the section size, and the bus body rigidity is improved while the bus body weight is not reduced. In addition, the invention adopts the adjoint variable sensitivity analysis method, and the calculated amount is greatly reduced, so a large-sized passenger bus body can be designed and the method has important guide action for the design technology of the passenger bus body.

Description

technical field [0001] The present invention relates to the field of passenger car body design, in particular to a high stiffness and light weight sensitivity analysis method of the passenger car body frame, which is mainly used to determine the geometric dimensions of the passenger car box girder section, so as to realize the goal of lightweight and high rigidity of the passenger car body frame structure . Background technique [0002] With the continuous increase of my country's economic aggregate, the state has invested heavily in the field of public transportation to improve people's livelihood. At the same time, the emission of automobile exhaust has caused serious pollution to the atmospheric environment. Therefore, the task of energy saving and emission reduction in the passenger car industry is quite arduous, which requires the innovation of passenger car design technology. The lightweight technology of the bus body is one of the feasible solutions: that is, on the...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 左文杰白建涛
Owner JILIN UNIV
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