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Simulation calculation method for pre-clamping stress of double-reinforced non-equal thickness-root-type variable-section leaf spring

A simulation calculation and non-uniform thickness technology, applied in calculation, computer-aided design, design optimization/simulation, etc., can solve the problem of complex calculation of clamping stiffness and non-equal thickness variable cross-section leaf spring pre-clamping with double reinforced roots Problems such as tight stress can be solved to speed up product development, reduce design and test costs, and improve design level

Inactive Publication Date: 2018-07-06
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 information obtained, the calculation of the clamping stiffness of each leaf spring of the double-reinforced non-equal-thickness variable-section leaf spring is very complicated, and it is affected by the pre-clamping end force of each leaf spring after assembly and clamping. Due to the constraints of simulation calculations, the simulation calculation method for the pre-clamping stress of double-reinforced root non-equal-thickness variable-section leaf springs has not been given before.

Method used

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  • Simulation calculation method for pre-clamping stress of double-reinforced non-equal thickness-root-type variable-section leaf spring
  • Simulation calculation method for pre-clamping stress of double-reinforced non-equal thickness-root-type variable-section leaf spring
  • Simulation calculation method for pre-clamping stress of double-reinforced non-equal thickness-root-type variable-section leaf spring

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Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: The width b=60mm of a certain double-strengthened root non-equal-thickness parabolic variable-section leaf spring, and half the effective length L T =575mm, modulus of elasticity E=200GPa, half length L of the straight section of the root clamped by saddle bolt 0 =50mm, horizontal length Δl of oblique section at the end 1 =30mm, the horizontal length of the oblique line section at the root Δl 2 =40mm, the horizontal distance l from the root of the oblique line section at the root to the end point of the leaf spring 2 =L T -L 0 =525mm. The horizontal distance l from the root of the parabola segment to the end point of the leaf spring 2p = l 2 -Δl 2 =495mm. The number of leaf springs n=3, the thickness h of the straight section at the root of each leaf spring 21 =18.5mm, h 22 = 18mm, h 23 =17.5mm; root thickness h of parabola segment 21p = 17.5 mm, h 22p = 17mm, h 23p = 16.5mm, the end thickness h of the parabola segment 11p = 8mm, h 12p = 7m...

Embodiment 2

[0065] Embodiment 2: the width b=60mm of a certain double-strengthened root non-equal-thickness parabolic variable-section leaf spring, and half the effective length L T =575mm, modulus of elasticity E=200GPa, half length L of the straight section of the root clamped by saddle bolt 0 =50mm, horizontal length Δl of oblique section at the end 1 =30mm, the horizontal length of the oblique line section at the root Δl 2 =40mm, the horizontal distance l from the root of the oblique line section at the root to the end point of the leaf spring 2 =L T -L 0 =525mm, the horizontal distance l from the root of the parabola segment to the end point of the leaf spring 2p = l 2 -Δl 2 =495mm. The number of leaf springs n=4, the thickness h of the straight section at the root of each leaf spring 21 = 17mm, h 22 = 16.5mm, h 23 = 16mm, h 24 =16mm; root thickness h of parabola segment 21p = 16mm, h 22p = 15.5mm, h 23p = 15mm, h 24p = 15mm; end thickness h of the parabola segment 11...

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Abstract

The invention relates to a simulation calculation method for the pre-clamping stress of a double-reinforced non-equal thickness-root-type variable-section leaf spring, and belongs to the technical field of suspension few-leaf variable-section leaf springs. According to the method, based on the number of leaves of the leaf spring, the structural parameter and free tangent arc height design value ofeach leaf of the leaf spring, the elasticity modulus and the thicknesses of gaskets at the root and the end, simulation calculation is conducted on the pre-clamping stress of each leaf of the leaf spring after the double-reinforced non-equal thickness-root-type variable-section leaf spring is assembled and clamped. Through a prototype test, it can be known that the simulation calculation method for the pre-clamping stress of the double-reinforced non-equal thickness-root-type variable-section leaf spring is accurate, and an accurate and reliable simulation calculation value of the pre-clamping stress of each leaf of the leaf spring can be obtained. By means of the method, it can be ensured that the pre-clamping stress of each leaf of the leaf spring after the double-reinforced non-equal thickness-root-type variable-section leaf spring is assembled and clamped meets design requirements, and the design level, reliability and service life of a product and the running-safety performance of a vehicle are improved; meanwhile, the design and test costs of the product are reduced, and the development rate of the product is increased.

Description

technical field [0001] The invention relates to a simulation calculation method for the pre-clamping stress of a plate spring with a small number of variable sections for a vehicle suspension, in particular a non-equal-thickness variable section leaf spring with double reinforced roots. Background technique [0002] With the implementation of automobile energy-saving and lightweight policies, the leaf springs with variable cross-sections are increasingly popular in vehicle suspension due to their advantages of light weight, high material utilization, no friction or small friction between sheets, low vibration and noise, and long service life. Experts, manufacturers and vehicle manufacturers have paid close attention to it, and it has been widely used in vehicle suspension systems. Among them, in order to meet the requirements of complex stress on the first leaf spring and strengthen the strength of the leaf spring, a double-reinforced non-equal root can be used Thick variabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/17G06F30/20G06F2119/06
Inventor 刘瑞军周长城赵雷雷杨腾飞杨铖兆李晓晗梁宇通石莹于曰伟
Owner SHANDONG UNIV OF TECH
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