Simulation calculation algorithm for pre-clamping stress of root non-equal-thickness small-piece variable-section leaf springs

A simulation calculation, non-equal thickness technology, applied in the direction of leaf spring, calculation, computer-aided design, etc., can solve the problems such as the inability to meet the requirements of modern CAD design of the suspension with fewer pieces and variable cross-section leaf spring, to speed up product development, The effect of reducing design and test costs and improving design level

Inactive Publication Date: 2018-06-12
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the researched data, it is known that there has been no reliable simulation calculation method for the pre-clamping stress of the non-equal thickness and small variable-section leaf springs at home and abroad. Requirements for spring modern CAD design

Method used

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  • Simulation calculation algorithm for pre-clamping stress of root non-equal-thickness small-piece variable-section leaf springs
  • Simulation calculation algorithm for pre-clamping stress of root non-equal-thickness small-piece variable-section leaf springs
  • Simulation calculation algorithm for pre-clamping stress of root non-equal-thickness small-piece variable-section leaf springs

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Embodiment one: the width b=60mm of a certain root portion non-equal thickness few parabolic variable section leaf spring, half span L T =570mm, 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=3, the thickness h of the straight section at the root of each leaf spring 21 = 18mm, h 22 = 17mm, h 23 = 17mm; the thickness h of the straight section at the end 11 = 9mm, h 12 = 8mm, h 13 = 8mm, the thickness ratio of the parabola segment β 1 =h 11 / h 21 = 0.5, β 2 =h 12 / h 22 = 0.4706, β 3 =h 13 / h 23 = 0.4706. The design value H of the free tangent arc height of each leaf spring g10 =87.7mm,H g20 =96mm,H g30 =98.8mm. Root gasket thickness δ c =3mm, end gasket thickness δ e = 6mm. According to the number of leaf springs, the structural parameters of each leaf spring, the design value of the free tangent arc height, elastic modulus, the thickness of the root gas...

Embodiment 2

[0064] Embodiment two: the width b=60mm of a certain root portion non-equal thickness few parabolic variable section leaf spring, half span L T =570mm, 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 21 = 16.5mm, h 22 =16mm h 23 = 16mm, h 24 = 16mm, the thickness h of the straight section at the end 11 =8.5mm, h 12 = 7mm, h 13 = 7mm, h 14 =7mm, the thickness ratio of the parabola segment β1 = h 11 / h 21 = 0.5, β 2 = β 3 = β 4 = h 12 / h 22 = 0.4375. The design value H of the free tangent arc height of each leaf spring g10 =92.0mm, H g20 =99.4mm, H g30 =102.1mm, H g40 = 104.4mm. Root gasket thickness δ c =3mm, end gasket thickness δ e = 6mm. According to the number of leaf springs, the structural parameters of each leaf spring, the design value of the free tangent arc height, elastic mod...

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Abstract

The invention relates to a simulation calculation algorithm for pre-clamping stress of root non-equal-thickness small-piece variable-section leaf springs, and belongs to the technical field of suspension small-piece variable-section leaf springs. According to the simulation calculation algorithm, simulation calculation can be carried out on the pre-clamping stress of each leaf spring after the root non-equal-thickness small-piece parabola type variable-section springs are assembled and clamped based on the leaf spring number, structural parameters of each leaf spring, the design value of freetangent arc height, elasticity modulus, the thicknesses of a root gasket and an end gasket; through a prototype test, the simulation calculation algorithm for the pre-clamping stress of the root non-equal-thickness small-piece variable-section leaf springs is correct, and a reliable technical method is provided for the simulation calculation of pre-clamping stress of the root non-equal-thickness small-piece parabola type variable-section leaf springs; by means of the simulation calculation algorithm, the pre-clamping stress of each leaf spring can be ensured to meet the design requirement, andthe design level, reliability and the service life of products and driving safety of a vehicle are improved; and meanwhile, the design and experimental expense of the products are reduced, and the product development speed is increased.

Description

technical field [0001] The invention relates to a small-piece variable-section leaf spring for vehicle suspension, especially a simulation calculation method for the pre-clamping stress of a small-piece variable-section leaf spring with non-uniform thickness at the root. Background technique [0002] With the implementation of automobile energy-saving and lightweight policies, 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 pay close attention to it. Among them, the most widely used is the small-piece parabolic variable-section leaf spring. Due to the complex force of the first leaf spring, the thickness of the straight root section and the thickness and length of the straight end section of the first leaf spring are usually great...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F3/02F16F1/18G06F17/50
CPCF16F1/185F16F3/023F16F2226/04F16F2228/06F16F2230/40F16F2238/022G06F30/17G06F30/20G06F2119/06
Inventor 赵雷雷周长城于曰伟王凤娟汪晓许祥利朱召辉梁宇通李晓晗马驰骋
Owner SHANDONG UNIV OF TECH
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