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The Calculation Method of the Stress of Each Leaf of the Non-end Contact Few Leaf End Reinforced Primary and Secondary Springs

A contact, non-end technology, which is applied in calculation, special data processing applications, instruments, etc., can solve the problem of not being able to provide accurate stress analysis calculation formulas, and unable to meet non-end contact type few-piece end-reinforced primary and secondary springs, etc. question

Inactive Publication Date: 2019-01-08
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, at home and abroad, most of the main and auxiliary springs of the non-end contact type few-piece end-reinforced main and auxiliary springs use finite element simulation software such as ANSYS to carry out stress numerical simulation on the main and auxiliary springs with a few pieces of variable cross-section with a given structure and load through solid modeling. , although this method can obtain relatively reliable stress simulation values, however, the finite element modeling and simulation analysis method can only perform numerical simulation verification on the stress of the primary and secondary springs with a small number of variable cross-sections with a given structure and load, and cannot provide accurate stress Analytical calculation formula, so it cannot meet the requirements of CAD design and software development of modern design of non-end contact type, few-piece end-reinforced main and auxiliary springs

Method used

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  • The Calculation Method of the Stress of Each Leaf of the Non-end Contact Few Leaf End Reinforced Primary and Secondary Springs
  • The Calculation Method of the Stress of Each Leaf of the Non-end Contact Few Leaf End Reinforced Primary and Secondary Springs
  • The Calculation Method of the Stress of Each Leaf of the Non-end Contact Few Leaf End Reinforced Primary and Secondary Springs

Examples

Experimental program
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Embodiment

[0061] Example: The width of a non-end contact type few-piece end-reinforced primary and secondary springs is b = 60 mm, half of the installation distance l 3 =55mm, length Δl of oblique line segment=30mm, elastic modulus E=200GPa. Half the length L of the main spring M =575mm,, the distance from the root of the main spring parabola segment to the end point of the main spring l 2M = L M -l 3 =520mm; the thickness h of the straight section at the root of each piece of main spring 2M =11mm, the number of main reeds m=2, where the end thickness h of the parabolic segment of the first main spring 1Mp1 =6mm, that is, 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, that is, the thickness ratio of the oblique line segment γM1 =h 1M1 / h 1Mp1 =1.17, the length l of the stra...

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Abstract

The invention discloses a method for calculating the stress of each piece of a non-end contact type few-piece end-reinforced primary and secondary spring, and belongs to the technical field of suspension leaf springs. According to the structural parameters, elastic modulus, active load of the auxiliary spring and the load of the main and auxiliary springs of each piece of main spring and auxiliary spring, the present invention can adjust the main and auxiliary springs of the non-end contact type few-piece end-reinforced main and auxiliary springs. The stresses at different positions of the spring and secondary spring are calculated. Through examples and ANSYS simulation verification, it can be known that this method can obtain accurate and reliable stress calculation values ​​of each main spring and auxiliary spring of the non-end contact type few-piece end-reinforced main and auxiliary springs at different positions, and use this method to improve non-end The design level, product quality, performance and reliability of the main and auxiliary springs of the end-contact type with few pieces of end reinforcement and variable cross-section can improve the ride comfort and safety of vehicles; reduce the quality and cost of suspension springs, and at the same time reduce product design and testing Expenses, speed up product development and design.

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 non-end contact type few-piece end-reinforced primary and secondary spring. 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 a non-end contact type few-piece end-reinforced primary and secondary spring form. The stiffness of the main spring and the combined stiffness of the main and auxiliary springs should meet the requirements of the suspension characteristics, and the stress of each main spring and auxiliary spring at different positio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/367
Inventor 周长城于曰伟赵雷雷邵杰汪晓邵明磊袁光明
Owner SHANDONG UNIV OF TECH
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