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Computing method of stress of each of end contact type less-leaf end part enhanced main spring and secondary spring

A calculation method and technology for main and auxiliary springs, which are applied in the field of vehicle suspension leaf springs, can solve the problems of inability to provide stress analytical calculation formulas, and inability to meet the problems of end-contact type, few-piece end-reinforced, variable-section main and auxiliary springs, etc.

Inactive Publication Date: 2016-09-21
SHANDONG UNIV OF TECH
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Problems solved by technology

At present, at home and abroad, most of the primary and secondary springs of end-contact type end-reinforced variable-section springs use finite element simulation software such as ANSYS to carry out stress numerical simulation on variable-section leaf springs with a given structure through solid modeling. A relatively reliable stress simulation value can be obtained. However, the finite element modeling and simulation analysis method can only perform numerical simulation verification on the leaf spring stress of a given structure and load, and cannot provide accurate stress analysis formulas, so it cannot meet the end contact requirements. Requirements for CAD design and software development of the modern design of main and auxiliary springs with few pieces and end reinforcements with variable cross-section

Method used

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  • Computing method of stress of each of end contact type less-leaf end part enhanced main spring and secondary spring
  • Computing method of stress of each of end contact type less-leaf end part enhanced main spring and secondary spring
  • Computing method of stress of each of end contact type less-leaf end part enhanced main spring and secondary spring

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Embodiment

[0064] Embodiment: the width b of a certain end contact type few-piece end reinforced variable cross-section primary and secondary springs = 60mm, half of the installation distance l 3 =55mm, length Δl of oblique line segment=30mm, elastic modulus E=200GPa. The number of main reeds m=2, half the length L of the main reed M =575mm, the thickness h of the straight section at the root of each main spring 2M =11mm, the distance l from the root of the parabolic segment of the main spring to the end point of the main spring 2M =L M -l 3 =520mm; end thickness h of the parabolic segment of the first main spring 1Mp1 =6mm, the thickness ratio of the parabola segment β 1 = h 1Mp1 / h 2M=0.55, the distance l from the end of the parabola segment to the end point of the main spring 1Mp1 = l 2M beta 1 2 =157.30mm, the thickness h of the straight section at the end 1M1 =7mm, the thickness ratio of the oblique line segment γ M1 =h 1M1 / h 1Mp1 =1.17, the length l of the straight ...

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Abstract

The invention discloses a computing method of stress of each of end contact type less-leaf end part enhanced main spring and secondary spring, and belongs to the technical field of suspension steel plate springs. According to the structure parameter, elasticity modulus of each of the main spring and the secondary spring, the secondary spring action load, and the load born by the main spring and the secondary spring, the stresses of each of the main spring and the secondary spring of the end contact type less-leaf end part enhanced main spring and secondary spring at different positions are computed. Through the practical computation and ANSYS simulation verification, the method can obtain accurate and reliable stress computing values of each of the main spring and the secondary spring at different positions; through the adoption of the method disclosed by the invention, the design level, the product quality, performance and reliability of the end contact type less-leaf end part enhanced main spring and secondary spring are improved, the smoothness and security of the vehicle driving are improved; the quality and cost of the suspension spring are reduced; and meanwhile, the product design expense and testing expense of the product are lowered, and the development design speed of the product is accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for calculating the stress of each leaf of a primary and secondary spring of an end-contact type with few-piece end-reinforced type. Background technique [0002] Leaf springs with variable cross-sections are widely used in vehicle leaf spring suspension systems due to their advantages of light weight, small inter-sheet friction, and low noise. In order to meet the design requirements of processing technology, stress intensity, stiffness and lug thickness, in the actual engineering application process, the small-piece variable-section leaf spring is usually designed as an end-contact type few-piece end-reinforced primary and secondary spring form. The stiffness of the main spring and the composite stiffness of the main and auxiliary springs meet the requirements of the suspension characteristics, and the stress of each main spring and auxiliary spring at different posi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 周长城赵雷雷邵杰汪晓王凤娟袁光明于曰伟
Owner SHANDONG UNIV OF TECH
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