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Simulating calculation method for pre-clamping stress of end non-identical structure type oblique type change section flat springs

A simulation calculation, non-isomorphic technology, applied in the direction of calculation, design optimization/simulation, special data processing applications, etc., can solve the problem of complex calculation of clamping stiffness, non-isomorphic inclined-line variable-section leaf spring at the end that has not been given and other issues, to achieve the effect of reducing design development and test costs, improving design level, and speeding up development

Inactive Publication Date: 2018-04-24
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the researched data, the calculation of the clamping stiffness of the non-equal-structured leaf spring with a small oblique line at the end is very complicated, and it is affected by the pre-clamping stress of each leaf spring and the structural parameters, free tangent arc height, The relationship between the thickness of the root gasket and the end gasket, the clamping stiffness of each leaf spring after assembly and clamping, the initial tangent arc height, and the constraints of the simulation calculation of the clamping end force of each leaf spring has not been done before. A Simulation Calculation Method for the Preclamping Stress of Non-Isomorphic Inclined Variable Section Leaf Springs

Method used

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  • Simulating calculation method for pre-clamping stress of end non-identical structure type oblique type change section flat springs
  • Simulating calculation method for pre-clamping stress of end non-identical structure type oblique type change section flat springs
  • Simulating calculation method for pre-clamping stress of end non-identical structure type oblique type change section flat springs

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Experimental program
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Effect test

Embodiment 1

[0031] Example 1: half of the working length L of a non-equal-structured oblique-line type variable-section leaf spring at a certain end T =550mm, half the length L of the straight section of the root clamped by the saddle bolt 0 =50mm, width b=60mm, elastic modulus E=200GPa. The number of leaf springs n=3, the thickness h of the straight section at the root of each leaf spring 2 =12mm, the thickness of the straight section at the end of each leaf spring is h 11 = 8mm, h 12 = 7mm, h 13 = 6mm. The thickness ratios of the oblique segments of each leaf spring are β 1 = h 11 / h 2 =0.6667,β 2 = h 12 / h 2 = 0.5833, β 3 = h 13 / h 2 = 0.50. The design value of the free tangent arc height of each leaf spring is H g10 =95.2mm,H g20 =101mm, H g30 = 107.7mm. Root gasket thickness δ c =3mm, end gasket thickness δ e = 6mm. According to the number of leaf springs, elastic modulus, the thickness of the root gasket and the end gasket, the structural parameters of each leaf...

Embodiment 2

[0062] Embodiment 2: the width b=60mm of a non-equal few-piece slanted-line variable-section leaf spring at a certain end, and half the effective length L T =550mm, half the length L of the straight section of the root clamped by the saddle bolt 0 =50mm, elastic modulus E=200GPa. The number of leaf springs n=4, the thickness h of the straight section at the root of each leaf spring 2 = 14mm, the thickness h of the straight section at the end 11 = 9mm, h 12 = 8mm, h 13 = 7mm, h 14 = 6 mm. The thickness ratios of the oblique segments of each leaf spring are β 1 = h 11 / h 2 = 0.6429, β 2 = h 12 / h 2 = 0.5714, β3 = h 13 / h 2 =0.50,β 4 = h 14 / h 2 = 0.4286. The design value of the free tangent arc height of each leaf spring is H g10 =90.4mm, H g20 =95.4mm,H g30 =99.7mm,H g40 = 104.7mm. Root gasket thickness δ c =3mm, end gasket thickness δ e = 6mm. According to the number of leaf springs, elastic modulus, the thickness of the root gasket and the end gasket,...

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Abstract

The invention relates to a simulating calculation method for pre-clamping stress of end non-identical structure type oblique type change section flat springs and belongs to the technical field of lesschange section flat springs for suspension. According to the method disclosed by the invention, pre-clamping stress of each assembled and clamped end non-identical structure type oblique type changesection flat spring can be subjected to simulating calculation according to a quantity of the flat springs, elasticity modulus, thicknesses of root gaskets and end gaskets, structural parameters and design values of free tangent arc heights of the flat springs. Due to prototype testing, the simulating calculation method for the pre-clamping stress of the end non-identical structure type oblique type change section flat springs provided by the invention is accurate, and provides a reliable technical method for simulating calculation of the pre-clamping stress of each flat spring. By utilizing the method, the pre-clamping stress of each flat spring can meet design requirements, and the design level and reliability of the product and the vehicle driving safety are improved. Meanwhile, the design and test cost of the product is decreased, and the product development speed is increased.

Description

technical field [0001] The invention relates to a simulation calculation method for the pre-clamping stress of a few-piece variable-section leaf spring of a vehicle suspension, especially a non-isomorphic oblique-line type variable-section leaf spring. Background technique [0002] With the rapid development of energy saving and lightweight of automobiles, leaf springs with small variable cross-sections are increasingly popular in vehicle suspension due to their advantages of light weight, high material utilization, no or small friction between sheets, low vibration and noise, and long service life. Experts, manufacturers and vehicle manufacturers are highly concerned. Compared with the parabolic variable-section leaf spring, the oblique-shaped variable-section leaf spring has simpler processing technology and required equipment, so it has been widely used in vehicle suspension systems. In order to meet the complex force requirements of the end of the first leaf spring, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/17G06F30/20
Inventor 周长城于曰伟邵明磊赵雷雷杨腾飞汪晓李晓晗杨铖兆梁宇通
Owner SHANDONG UNIV OF TECH
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