Calculation Method of Composite Stiffness of Primary and Secondary Springs of Non-end-contacting Few-piece End-reinforced Type

A composite stiffness and contact technology, applied in the field of vehicle suspension leaf springs, can solve problems such as the inability to provide the analytical calculation formula for the composite stiffness of the main and auxiliary springs, and the inability to meet the requirements.

Inactive Publication Date: 2018-10-12
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of finite element simulation analysis methods can obtain relatively reliable simulation values, however, because ANSYS simulation analysis can only perform numerical simulation verification on the deformation and stiffness of the primary and secondary springs under a given structure and load, it cannot provide accurate primary and secondary springs. Composite stiffness analytical calculation formula, so it cannot meet the requirements of analytical design of non-end contact type few-piece end-reinforced primary and secondary springs and CAD software development

Method used

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  • Calculation Method of Composite Stiffness of Primary and Secondary Springs of Non-end-contacting Few-piece End-reinforced Type
  • Calculation Method of Composite Stiffness of Primary and Secondary Springs of Non-end-contacting Few-piece End-reinforced Type
  • Calculation Method of Composite Stiffness of Primary and Secondary Springs of Non-end-contacting Few-piece End-reinforced Type

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Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1: 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 thickness h of the straight section at the root of each main spring 2M =11mm, the distance l from the root of the parabola segment to the end point of the main spring 2M = L M -l 3 =520mm; 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 =154.71mm, 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 section at the end ...

Embodiment 2

[0062] Embodiment 2: The width b of a non-end contact type non-end contact type few-piece end-reinforced primary and secondary springs is 60mm, half of the installation distance l 3 =60mm, the length of the oblique segment Δl=30mm, and the modulus of elasticity E=200GPa. Half the length L of the main spring M =600mm, the thickness h of the straight section at the root of each main spring 2M =12mm, the distance l from the root of the parabola segment to the end point of the main spring 2M =L M -l 3 =540mm; the number of main reeds m=2, where the 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 =0.5, the distance l from the end of the parabola segment to the end point of the main spring 1Mp1 = l 2M beta 1 2 =135mm, 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 strai...

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Abstract

The invention relates to a method for checking and calculating the composite stiffness of a non-end-contact type few-piece end-reinforced primary and secondary spring, which belongs to the technical field of suspension leaf springs. According to the structural parameters and elastic modulus of each auxiliary spring and the auxiliary spring, the invention checks and calculates the composite stiffness of the non-end contact type few-piece end-reinforced variable-section main and auxiliary springs. Through examples and ANSYS simulation verification, it can be seen that this method can obtain accurate and reliable composite stiffness checking values ​​of the non-end contact type few-piece end-reinforced primary and secondary springs, which is the non-end-contact type few-piece end-reinforced primary and secondary springs with variable cross-section The checking calculation of the composite stiffness provides a reliable checking method, and lays a technical foundation for the analytical design of the main and auxiliary springs of this structure and the development of CAD software. The method can improve the design level, product quality and performance, and ride comfort of the variable-section primary and secondary springs of the vehicle suspension; at the same time, it can reduce the weight and cost of the suspension spring, reduce product design and test costs, and speed up product development.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a method for checking and calculating the composite stiffness of a non-end contact type few-piece end-reinforced primary and secondary springs. 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 end 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. , when the load is greater than the active load of the auxiliary spring, the contact point of the auxiliary spring is in contact with a certain point of the parabola section of the main spring, that is, the non-end c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G01M13/00
CPCG01M13/00G06F30/17
Inventor 周长城赵雷雷于曰伟汪晓袁光明邵杰刘灿昌
Owner SHANDONG UNIV OF TECH
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