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Simulation calculation algorithm of pre-clamping stress of different-thickness main springs of first-level gradient rigidity leaf spring

A technology of simulation calculation and unequal thickness, applied in the field of gradient stiffness leaf springs of vehicle suspension, can solve the problem of not giving the pre-clamping stress of primary gradient stiffness leaf springs with non-uniform thickness, and reduce the design and test. cost, speed up development, and the effect of improving the level of design

Inactive Publication Date: 2018-07-10
SHANDONG UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, according to the researched data, due to the constraints of the simulation calculation of the initial tangent arc height of the first non-uniform thickness main spring after the first-level gradient stiffness leaf spring is assembled and clamped, the first-level gradient stiffness plate has not been given before at home and abroad. Simulation Calculation Method of Preclamping Stress of Main Spring with Unequal Thickness

Method used

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  • Simulation calculation algorithm of pre-clamping stress of different-thickness main springs of first-level gradient rigidity leaf spring
  • Simulation calculation algorithm of pre-clamping stress of different-thickness main springs of first-level gradient rigidity leaf spring
  • Simulation calculation algorithm of pre-clamping stress of different-thickness main springs of first-level gradient rigidity leaf spring

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Embodiment 1

[0025] Embodiment 1, the width b=60mm of leaf spring with gradually changing stiffness at a certain stage, the modulus of elasticity E=200GPa, the half length L of the straight section at the root clamped by saddle bolts 0 = 50mm. The number of main reeds is n=3 pieces, and the thickness of each piece of non-equal thickness main spring is h 1 = 9mm, h 2 = 8mm, h 3 =8mm; Half the working length L of each main spring 1T =525mm, L 2T =450mm, L 3T =350mm, the design value of the free tangent arc height of each main spring is H g10 =96.7mm,H g20 =70.4mm, H g30 = 41.2 mm. 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 = 150 mm. According to the number of main reeds, the structural parameters of each non-uniform thickness main spring and the design value of free tangent arc height, elastic modulus, each non-uniform thickness main spring after ass...

Embodiment 2

[0046] Embodiment two, the width b=63mm of a leaf spring with gradually changing stiffness, the modulus of elasticity E=200GPa, half the length L of the straight section of the root clamped by the saddle bolt 0 = 55mm. The number of main reeds is n=2, and the thickness of each non-equal main spring is h 1 = 10mm, h 2 =9mm; Half the working length L of each main spring 1T =525mm, L 2T =450mm, the design value of the free tangent arc height of each main spring is H g10 =92.5mm, H g20 = 69.0 mm. 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 = 150 mm. According to the number of main reeds, the structural parameters of each main spring, the design value of the free tangent arc height, and the elastic modulus, the pre-clamping of each non-equal thickness main spring after the first-level gradient stiffness leaf spring is assembled and clamped Str...

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Abstract

The invention relates to a simulation calculation algorithm of pre-clamping stress of different-thickness main springs of a first-level gradient rigidity leaf spring and belongs to the technical fieldof gradient rigidity leaf springs of suspensions. Simulation calculation can be performed on pre-clamping stress of each different-thickness main spring after assembly clamping of the first-level gradient rigidity leaf spring according to the number of main springs, structure parameters of each main spring, design values of free tangent arc heights and elasticity modulus. Prototype tests prove that the simulation calculation algorithm of pre-clamping stress of the different-thickness main springs of the first-level gradient rigidity leaf spring is correct, and the reliable and accurate simulation calculation value of the pre-clamping stress of each different-thickness main spring can be obtained. By means of the method, the pre-clamping stress of each different-thickness main spring can meet the design requirement after assembly clamping of the first-level gradient rigidity leaf spring, the design level and reliability of the product can be improved, the service life of the product can be prolonged, and the vehicle running safety can be improved. Meanwhile, the design and test cost of the product can be reduced, and the development speed of the product can be increased.

Description

technical field [0001] The invention relates to a simulation calculation method for the pre-clamping stress of a non-equal-thickness main spring of 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. Due to the complex force of the first main spring, non-equal thickness main springs are usually used, that is, the thickness of the first main spring is greater than that of other main springs, so as to meet the complex force requirements of the first main spring. In order to improve the strength and service life of the main spring, through the different free tangent arc...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/17G06F30/20G06F2119/06
Inventor 周长城汪晓于曰伟梁勋乾杨腾飞杨铖兆李晓晗刘灿昌朱召辉
Owner SHANDONG UNIV OF TECH
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