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Simulating calculation method for pre-clamping stress of equal-thickness main springs of first-level gradual rigidity leaf spring

A simulation calculation and pre-clamping technology, which is applied in the field of vehicle suspension gradient stiffness leaf spring, can solve the problem that the suspension gradient stiffness leaf spring cannot be satisfied, and achieves the goal of reducing design and test costs, speeding up development speed, and improving design level. Effect

Inactive Publication Date: 2018-06-29
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 research data, due to the constraints of the simulation calculation of the initial radius of curvature after the assembly and clamping of the equal-thickness main springs, no accurate and reliable pre-clamping of the equal-thickness main spring of the first-level gradient stiffness leaf spring has been given before. The simulation calculation method of stress, therefore, cannot meet the requirements of the rapid development of vehicles and the modern CAD design of suspension gradient stiffness leaf springs

Method used

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  • Simulating calculation method for pre-clamping stress of equal-thickness main springs of first-level gradual rigidity leaf spring
  • Simulating calculation method for pre-clamping stress of equal-thickness main springs of first-level gradual rigidity leaf spring
  • Simulating calculation method for pre-clamping stress of equal-thickness main springs of first-level gradual rigidity leaf spring

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1, the width b=60mm of a leaf spring with gradually varying stiffness, half the length L of the straight section at the root 0 =50mm, elastic modulus E=200GPa. The number of main reeds is n=3, the thickness of each main spring of equal thickness is h=8mm, and the half of the active length of each main spring is L 1T =525mm,L 2T =450mm, L 3T = 350mm. The number of auxiliary reeds m = 2 pieces, the thickness h of each auxiliary reed A1 = h A2 =13mm, half of the working length of each auxiliary spring is L A1T =250mm,L A2T = 150mm. The design value of the free tangent arc height of each main spring is H g10 =98.0mm, H g20 =70.4mm, H g30 = 40.1mm. According to the number of main reeds, the structural parameters of each main spring and the design value of free tangent arc height, elastic modulus, the pre-clamping of each piece of equal-thickness main spring after assembly and clamping of the first-level gradient stiffness leaf spring Stress simulation ...

Embodiment 2

[0046] Embodiment two, the width b=63mm of leaf spring of a certain level of gradient stiffness, half the length L of the straight section at the root 0 =55mm, elastic modulus E=200GPa. The number of main reeds is n=2, the thickness of each main spring is h=9mm, and half of the active length of each main spring is L 1T =525mm, L 2T = 450mm. The number of auxiliary reeds m = 2 pieces, the thickness h of each auxiliary reed A1 =h A2 =13mm, half of the working length of each auxiliary spring is L A1T =250mm,L A2T = 150mm. The design value of the free tangent arc height of each piece of equal-thickness main spring is H g10 =91.6mm, H g20 =69mm. According to the number of main reeds, the structural parameters of each main spring and the design value of free tangent arc height, elastic modulus, the pre-clamping stress of each piece of equal-thickness main spring after the first-level gradient stiffness leaf spring is assembled and clamped Perform simulation calculations. ...

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Abstract

The invention relates to a simulating calculation method for the pre-clamping stress of equal-thickness main springs of a first-level gradual rigidity leaf spring and belongs to the technical field ofsuspension gradual rigidity leaf springs. The method can be used for simulating calculation of the pre-clamping stress of the assembled and clamped equal-thickness main springs of the first-level gradual rigidity leaf spring according to the number, structure parameters, design values of free tangent line camber heights and elasticity modulus of the main springs. Prototype testing shows that thesimulating calculation method for the pre-clamping stress of the equal-thickness main springs of the first-level gradual rigidity leaf spring is correct, accurate and reliable simulating calculation values of the pre-clamping stress of the equal-thickness main springs can be obtained, and the reliable technological method is provided for simulation calculation of the pre-clamping stress of the equal-thickness main springs of the first-level gradual rigidity leaf spring. The method can ensure that the pre-clamping stress of the equal-thickness main springs meets design requirements, the designlevel and reliability of products are improved, the service life of products is prolonged, and vehicle running safety is improved; and meanwhile, the design and testing cost of products is reduced, and the development speed is increased.

Description

technical field [0001] The invention relates to a simulation calculation method for the pre-clamping stress of a thick main spring such as a leaf spring with gradually changing stiffness of a vehicle suspension, especially a first-order gradually changing stiffness leaf spring. Background technique [0002] In order to meet the design requirements of the ride comfort of the vehicle under different loads, one-stage gradient stiffness leaf springs can be used, that is, a certain primary and secondary spring gradient gap is designed between the last main spring and the first main and secondary springs. Among them, The most widely used is the one-stage gradient stiffness leaf spring of the equal-thickness main spring type. In order to improve the strength and service life of the main spring, through different free tangent arc heights and free curvature radii of equal thickness main springs, it is ensured that the initial tangent arc height of the first main spring after assembly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F3/02F16F1/18G06F17/50
CPCF16F1/187F16F3/023G06F30/17G06F30/20G06F2119/06
Inventor 周长城汪晓于曰伟梁勋乾杨腾飞杨铖兆李晓晗刘灿昌梁宇通
Owner SHANDONG UNIV OF TECH
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