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Simulation Algorithm for Maximum Limiting Deflection of Leaf Spring with Non-equal Bias Frequency and Gradual Stiffness

A technology of maximum limit and simulation calculation, applied to the direction of spring components, leaf springs, springs, etc. composed of several springs, can solve the problems that it is difficult to obtain accurate and reliable maximum limit deflection design value, unsatisfactory, difficult to protect, etc.

Inactive Publication Date: 2019-02-19
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the constraints of the main spring deflection calculation, contact load simulation calculation and determination of the maximum allowable load of the non-equal frequency one-stage gradual stiffness leaf spring, the maximum non-equal frequency one-stage gradual stiffness leaf spring has not been given before. Most of the simulation test algorithms for limit deflection are designed based on experience. Therefore, it is difficult to obtain an accurate and reliable maximum limit deflection design value, and it is difficult to ensure that the limit device can protect the leaf spring under impact load, let alone Meet the requirements of the rapid development of the vehicle industry and the development of modern CAD software

Method used

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  • Simulation Algorithm for Maximum Limiting Deflection of Leaf Spring with Non-equal Bias Frequency and Gradual Stiffness
  • Simulation Algorithm for Maximum Limiting Deflection of Leaf Spring with Non-equal Bias Frequency and Gradual Stiffness
  • Simulation Algorithm for Maximum Limiting Deflection of Leaf Spring with Non-equal Bias Frequency and Gradual Stiffness

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Embodiment

[0056] Example: The width of a non-equal biased first grade gradient stiffness leaf spring b=63mm, elastic modulus E=200GPa, maximum allowable stress [σ]=800MPa; half of the span of the leaf spring is half the function of the first main spring Length L 1t =525mm, half L of the clamping distance of riding bolt 0 =50mm. The number of main reeds n=3, the thickness of each main spring h 1 =h 2 =h 3 =8mm, the half length of each main spring is L respectively 1t =525mm, L 2t =450mm, L 3t =350mm; half of the clamping length is L 1 =L 1t -L 0 / 2=500mm, L 2 =L 2t -L 0 / 2=425mm, L 3 =L 3t -L 0 / 2=325mm. The number of secondary springs m=2, the thickness of each secondary spring h A1 =h A2 =13mm, half of the acting length of each leaf auxiliary spring is L A1t =250mm, L A2t =150mm, half of the clamping length is L A1 =L A1t -L 0 / 2=225mm, L A2 =L A2t -L 0 / 2=125mm. The total number of main and auxiliary springs N=n+m=5, the clamping stiffness of the main spring K M =75.4N / mm, compos...

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Abstract

The invention relates to a simulation test algorithm for the maximum limit deflection of a plate spring with non-equal bias frequency and one-stage gradient stiffness, and belongs to the technical field of suspension leaf springs. The present invention can be based on the contact load simulation calculation and maximum allowable load determination based on the structural parameters, elastic modulus, maximum allowable stress, and initial tangent arc height design value of each main spring and auxiliary spring. In the above, the simulation calculation of the maximum limit deflection of the first-order gradient stiffness leaf spring with unequal bias frequency is carried out. Through the example simulation calculation and the prototype load deflection test, it can be known that the simulation test algorithm of the maximum limit deflection of the non-equal bias frequency one-stage gradient stiffness leaf spring provided by the present invention is correct. Using this method can obtain accurate and reliable maximum limit deflection simulation calculation value, improve product design level, reliability and service life and vehicle driving safety; at the same time, it can also reduce design and test costs and speed up product development.

Description

Technical field [0001] The invention relates to a simulation algorithm for the maximum limit deflection of a leaf spring of a vehicle suspension, in particular a non-equal deviation frequency and first grade gradient stiffness leaf spring. Background technique [0002] In order to meet the requirements of the strength of the main spring of the first graded-stiffness leaf spring, the secondary spring is usually made to act as early as possible to bear the load and reduce the main spring stress, that is, use the non-equal deviation frequency first-grade graded-stiffness leaf spring, which is based on the maximum allowable stress And the maximum limit deflection corresponding to the maximum allowable load, a limit device is set to prevent the leaf spring from breaking due to impact load and improve the reliability and safety of the leaf spring suspension. However, due to the constraints of the main spring deflection calculation, contact load simulation calculation, and the determina...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F3/02F16F1/18G06F17/50
CPCF16F1/185F16F3/023F16F2238/022G06F30/17
Inventor 周长城汪晓马驰骋赵雷雷杨腾飞王凤娟邵明磊
Owner SHANDONG UNIV OF TECH
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