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Simulation calculation method for maximum stress characteristic of root of high-strength leaf spring with three-level gradient stiffness

A simulation calculation and maximum stress technology, applied in the field of vehicle suspension leaf springs, can solve problems such as the maximum stress characteristics of high-strength three-stage gradient stiffness leaf springs that are not given

Inactive Publication Date: 2017-03-22
SHANDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the constraints of key issues such as gradual stiffness and deflection calculations, contact load simulation calculations, and maximum load simulation calculations corresponding to the maximum limit deflection, according to the information found, no reliable high-strength three-dimensional structure has been given at home and abroad. Simulation Calculation Method of Maximum Stress Characteristics at the Root of Leaf Spring with Gradual Stiffness

Method used

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  • Simulation calculation method for maximum stress characteristic of root of high-strength leaf spring with three-level gradient stiffness
  • Simulation calculation method for maximum stress characteristic of root of high-strength leaf spring with three-level gradient stiffness
  • Simulation calculation method for maximum stress characteristic of root of high-strength leaf spring with three-level gradient stiffness

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Embodiment

[0070] Embodiment: the width b=63mm of a certain high-strength three-stage gradient stiffness leaf spring, half L of the saddle bolt clamping distance 0 =50mm, elastic modulus E=200GPa. The total number of pieces of the main and auxiliary springs is N=5, where the number of pieces of the main spring is n=2, and the thickness of each piece of the main spring is h 1 =h 2 =8mm; half of the active length of each leaf of the main spring is L 1T =525mm,L 2T =450mm; half of the clamping length is L 1 =L 1T -L 0 / 2=500mm, L 2 =L 2T -L 0 / 2=425mm. The number of sheets of the first secondary spring n 1 = 1, thickness h A11 =8mm, half of the active length is LA11T =350mm, half of the clamping length is L A11 =L 3 =L A11T -L 0 / 2=325mm. The number of pieces of the secondary secondary spring n 2 =1, thickness h A21 =13mm, half of the active length is L A21T =250mm, half of the clamping length is L A21 =L 4 =L A21T -L 0 / 2=225mm. The number of sheets of the third sec...

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Abstract

The present invention relates to a simulation calculation method for a maximum stress characteristic of a root of a high-strength leaf spring with three-level gradient stiffness. In the method provided by the present invention, according to a structure parameter, an elastic modulus, main spring clamping stiffness, composite clamping stiffness between a main spring and each level of secondary springs, and maximum limit deflection of a high-strength leaf spring with three-level gradient stiffness, simulation calculation can be performed on a maximum stress characteristic of a root of the main spring and each level of secondary springs based on simulation calculation of a contact load and a maximum load. A prototype test shows that the provided simulation calculation method for the maximum stress characteristic of the root of the high-strength leaf spring with three-level gradient stiffness is correct, and provides a reliable technical basis for characteristic simulation verification of the high-strength leaf spring with three-level gradient stiffness. By using the method, the product design level can be improved, the maximum stress of the root are ensured to satisfy strength design requirements, and the reliability and service life of the leaf spring and vehicle driving security are enhanced. Moreover, design and test costs are reduced, and product development is sped up.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a simulation calculation method for the maximum stress characteristic of the root of a high-strength three-stage gradually changing rigidity leaf spring. Background technique [0002] With the emergence of high-strength steel plate materials, high-strength three-stage gradient leaf springs can be used to meet the design requirements of suspension gradient stiffness and suspension bias frequency under different loads, and further improve vehicle ride comfort. , according to the design value of the maximum limit deflection, set a limit protection device to prevent the leaf spring from breaking due to impact, improve the reliability and service life of the leaf spring and the smoothness and safety of the vehicle. The maximum load corresponding to the maximum deflection and the maximum stress at the root of the main spring and secondary springs at all levels determine the reliabili...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20
Inventor 周长城赵雷雷杨腾飞朱召辉汪晓邵明磊毛少坊
Owner SHANDONG UNIV OF TECH
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