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Simulation calculation method of force of clamped ends of end-reinforced homo-structural few-leaf variable-section plate springs

A technology of simulation calculation and variable cross-section, applied in leaf springs, calculation, computer-aided design, etc., can solve the complicated calculation of clamping end force and clamping stiffness of few-piece variable-section leaf springs with no structure such as end reinforcement and other issues to achieve the effect of reducing design and test costs, improving design level, and speeding up development

Inactive Publication Date: 2018-07-13
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 the few-piece parabolic variable-section leaf spring is very complicated due to the structure of the end reinforcement, etc., and it is affected by the clamping end force of each leaf spring and the free tangent arc of each leaf spring. Due to the restriction of the relationship between height, clamping stiffness, and initial tangent arc height, the simulation calculation method for the clamping end force of a small-piece variable-section leaf spring with a structure such as end reinforcement has not been given before.

Method used

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  • Simulation calculation method of force of clamped ends of end-reinforced homo-structural few-leaf variable-section plate springs
  • Simulation calculation method of force of clamped ends of end-reinforced homo-structural few-leaf variable-section plate springs
  • Simulation calculation method of force of clamped ends of end-reinforced homo-structural few-leaf variable-section plate springs

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Effect test

Embodiment 1

[0028]Embodiment 1: the width b=60mm of a certain end strengthened equal structure few-sheet parabolic variable-section leaf spring, and half the effective length L T =575mm, half the length L of the straight section of the root clamped by the saddle bolt 0 =50mm, the horizontal distance l from the root of the parabola segment to the end point of the leaf spring 2 =L T -L 0 =525mm, elastic modulus E=200GPa. The number of leaf springs is n=3, and the horizontal length of the oblique line segment Δl=30mm. The thickness h of the straight section at the root of each leaf spring 2 = 18mm, the end thickness h of the parabola segment 1p = 7mm, the thickness h of the straight section at the end 1 = 8mm. The thickness ratio of the parabolic segment of each leaf spring β=h 1p / h 2 =0.3889, the thickness ratio of the oblique line segment γ=h 1 / h 1p = 1.1429. The horizontal distance l from the root of the oblique line segment to the end point of the leaf spring 1p = l 2 bet...

Embodiment 2

[0050] Embodiment two: the width b=60mm of a certain end reinforced equal structure few-piece parabolic variable-section leaf spring, and half the active length L T =575mm, half the length L of the straight section of the root clamped by the saddle bolt 0 =50mm, the horizontal length of the oblique line segment Δl=30mm, the horizontal distance l from the root of the parabola segment to the end point of the leaf spring 2 =L T -L 0 =525mm, 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 = 16mm, the end thickness h of the parabola segment 1p = 7mm, the thickness h of the straight section at the end 1 = 8mm. The thickness ratio of the parabolic segment of each leaf spring β=h 1p / h 2 =0.4375, the thickness ratio of the oblique line segment γ=h 1 / h 1p = 1.1429. The horizontal distance l from the root of the oblique line segment to the end point of the leaf spring 1p = l 2 beta 2 = 100...

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Abstract

The invention relates to a simulation calculation method of force of clamped ends of end-reinforced homo-structural few-leaf variable-section plate springs and belongs to the technical field of suspension few-leaf variable-section plate springs. According to the number of the plate springs, elasticity modulus, structure parameters of each plate spring and the design value of free tangent line camber height, simulation calculation is conducted on the force of the clamped end of each plate spring after the end-reinforced homo-structural few-leaf parabolic variable-section plate springs are assembled and clamped. It is shown in a prototype testing that the provided simulation calculation method of the force of the clamped ends of the end-reinforced homo-structural few-leaf parabolic variable-section plate springs is correct, an accurate reliable simulation calculation value of the force of the clamped end of each plate spring can be obtained, and a reliable technical base is laid for simulation calculation of preclamping stress of each plate spring. By means of the method, the design standard and reliability of a product can be improved, the service life of the product can be prolonged, and the automobile driving safety can be improved. Meanwhile, the design and experiment expenses of the product can also be reduced, and the development speed of the product is increased.

Description

technical field [0001] The invention relates to a small-piece variable-section leaf spring of a vehicle suspension, in particular to a simulation calculation method for clamping end point force of a few-piece variable-section leaf spring of a structure such as end reinforcement. 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 have paid close attention to it, and it has been widely used in vehicle suspension systems. Among them, in order to meet the complex force requirements of the end of the leaf spring, the parabolic section of each leaf spring is parallel to the end. An oblique segment is added between the straight sections...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50F16F1/18
CPCF16F1/187G06F30/15G06F30/17G06F30/20G06F2119/06
Inventor 周长城杨铖兆于曰伟赵雷雷汪晓杨腾飞梁宇通李晓晗刘灿昌
Owner SHANDONG UNIV OF TECH
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