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Simulation calculation algorithm for pre-clamping for end-reinforced isomorphic taper leaf springs

A technology of simulation calculation and variable cross-section, applied in leaf springs, calculation, computer-aided design, etc., can solve the problems of complex calculation of clamping stiffness, no end reinforcement, etc. The effect of speeding up product development, reducing design development 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 information obtained, the calculation of the clamping stiffness of the few-piece parabolic variable-section leaf spring with end reinforcement is very complicated, and it is affected by the pre-clamping stress of each leaf spring and the free tangent arc of each leaf spring. The relationship between height, clamping stiffness, initial tangent arc height, and the constraints of the simulation calculation of the pre-clamping end point force of each leaf spring have not been given before. simulation calculation method

Method used

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  • Simulation calculation algorithm for pre-clamping for end-reinforced isomorphic taper leaf springs
  • Simulation calculation algorithm for pre-clamping for end-reinforced isomorphic taper leaf springs
  • Simulation calculation algorithm for pre-clamping for end-reinforced isomorphic taper leaf springs

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Effect test

Embodiment 1

[0032] 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 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=3, 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 segment of each leaf spring to the end point of the leaf spring 1p = ...

Embodiment 2

[0061] 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 segment of each leaf spring to the end point of the leaf spring 1p = l 2...

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Abstract

The invention relates to a simulation calculation algorithm for the pre-clamping stress for end-reinforced isomorphic taper leaf springs, and belongs to the technical field of suspension taper leaf springs. According to the simulation calculation algorithm, the pre-clamping stress for all leaf springs after the end-reinforced isomorphic parabolic taper leaf springs number of pieces of the springsare assembled and clamped is simulation calculated according to the elasticity modulus, the thickness of a root and an end gasket according to the number of the leaf springs, the elastic modulus, thethickness of a root and an end gasket, the structural parameters of the leaf springs and the design value of the arc height of free tangent lines; according to a prototype testing, the simulation calculation algorithm for the pre-clamping stress for the end-reinforced isomorphic taper leaf springs is known to be right, and a reliable technical method is provided for simulation calculation of the pre-clamping stress of the leaf springs; by means of the method, the pre-tightening stress of the plate springs after the leaf springs are assembled and clamped can meet the design requirements, the design level, the reliability of products are improved, the service life of the products is prolonged, and the driving safety of a vehicle is improved; and meanwhile, product design and test cost is reduced, and the product development speed is increased.

Description

technical field [0001] The invention relates to a small-piece variable-section leaf spring for a vehicle suspension, in particular to a simulation calculation method for the pre-clamping stress 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): F16F3/02F16F1/18G06F17/50
CPCF16F1/185F16F3/023F16F2226/04F16F2228/06F16F2230/40F16F2238/022G06F30/17G06F30/20G06F2119/06
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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