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Method for checking composite stiffness of non-end contact type taper leaf root enhanced main and auxiliary leaf springs

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

Inactive Publication Date: 2016-09-21
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 variable-section main and auxiliary springs and CAD software development

Method used

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  • Method for checking composite stiffness of non-end contact type taper leaf root enhanced main and auxiliary leaf springs
  • Method for checking composite stiffness of non-end contact type taper leaf root enhanced main and auxiliary leaf springs
  • Method for checking composite stiffness of non-end contact type taper leaf root enhanced main and auxiliary leaf springs

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Embodiment 1

[0033] Embodiment 1: The width of a non-end contact type few-piece end-reinforced variable-section 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 s...

Embodiment 2

[0060] Embodiment 2: The width b of a non-end contact type non-end contact type few-piece end-reinforced variable-section 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 lengt...

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Abstract

The invention provides a method for checking the composite stiffness of non-end contact type taper leaf root enhanced main and auxiliary leaf springs, and belongs to the technical field of suspension leaf springs. The composite stiffness of the main and auxiliary leaf springs can be checked according to the structural parameter and elastic modulus of each main leaf spring and auxiliary leaf spring of the non-end contact type taper leaf root enhanced variable cross-section main and auxiliary leaf springs. An example and ANSYS simulation verification show that, the method can obtain an accurate and reliable composite stiffness checking value of the non-end contact type taper leaf root enhanced main and auxiliary leaf springs, provide a reliable checking method for checking the composite stiffness of the non-end contact type taper leaf root enhanced variable cross-section main and auxiliary leaf springs, and lay a technical foundation for the analytical design and CAD (Computer Aided Design) software development of the main and auxiliary leaf springs of this structure. By using the method for checking the composite stiffness of the non-end contact type taper leaf root enhanced main and auxiliary leaf springs provided by the invention, the design level, the product quality and performance and the vehicle ride comfort of a vehicle suspension variable cross-section main and auxiliary leaf springs can be improved; and meanwhile, the weight and cost of the suspension springs can be reduced, the product design and testing expenses can be reduced, and the product development speed can be accelerated.

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 variable-section primary and secondary springs. 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 on the parabolic section of the main spri...

Claims

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Application Information

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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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