Simulation calculation method of maximum stress characteristics of high-intensity second-level gradually varied rigidity main and subsidiary springs

Abstract

The invention relates to a simulation calculation method of maximum stress characteristics of high-intensity second-level gradually varied rigidity main and subsidiary springs, and belongs to the technical field of vehicle bearing steel plate springs. By the adoption of the simulation calculation method of the maximum stress characteristics of the high-intensity second-level gradually varied rigidity main and subsidiary springs, simulation calculation can be conducted on the maximum stress characteristics of the high-intensity second-level gradually varied rigidity main and subsidiary springs according to structural parameters, elastic moduli, maximum permissible stresses and no-load loads of all pieces of the main spring and the subsidiary spring and initial tangent arc height design values of the main spring, a first level subsidiary spring and a second level subsidiary spring. It can be known from the simulation and a model machine stress test that, the provided simulation calculation method of the maximum stress characteristics of the high-intensity second-level gradually varied rigidity main and subsidiary springs is correct, and accurate and reliable maximum stress nature simulation calculation values of the main and subsidiary springs can be obtained. By utilizing the method, it can be guaranteed that a designed plate spring meets a stress intensity design requirement, and the design level and the reliability of a product and the vehicle driving safety are improved; meanwhile, the design and test expense is reduced, and the product development speed is accelerated.

Description

technical field

[0001] The invention relates to a vehicle suspension leaf spring, especially a simulation calculation method for the maximum stress characteristic of a high-strength two-stage gradually changing stiffness primary and secondary springs. Background technique

[0002] With the emergence of high-strength steel plate materials, high-strength two-stage gradient stiffness leaf springs can be used for vehicle suspension, so as to further meet the design requirements that the suspension gradient bias frequency remains unchanged under different loads. Among them, the high-strength two-stage gradient stiffness The maximum stress characteristic of the leaf spring has an important influence on the reliability and service life of the leaf spring and the driving safety of the vehicle. Since the maximum stress of the high-strength two-stage gradient stiffness main and auxiliary springs is not only related to the structural parameters and loads of the main spring, the first-l...

Examples

Embodiment

[0060] Embodiment: the width b=63mm of a certain high-strength two-stage gradient stiffness leaf spring, half L of the saddle bolt clamping distance 0 =50mm, elastic modulus E=200GPa, maximum allowable stress [σ]=1200MPa. The total number of pieces of the main and auxiliary springs is N=5, where the number of main reeds 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 design value H of the initial tangent arc height of the main spring gM0 = 112.2 mm. The number of sheets of the first secondary spring m 1 = 1 piece, thickness h A11 =11mm, half of the active length is L A11T =360mm, half of the clamping length L A11 = L A11T -L 0 / 2=335mm; the design value H of the initial tangent arc height of the first secondary spring gA10 = 22.8 mm. The number of pieces of se...

technical field

[0001] The invention relates to a vehicle suspension leaf spring, especially a simulation calculation method for the maximum stress characteristic of a high-strength two-stage gradually changing stiffness primary and secondary springs. Background technique

[0002] With the emergence of high-strength steel plate materials, high-strength two-stage gradient stiffness leaf springs can be used for vehicle suspension, so as to further meet the design requirements that the suspension gradient bias frequency remains unchanged under different loads. Among them, the high-strength two-stage gradient stiffness The maximum stress characteristic of the leaf spring has an important influence on the reliability and service life of the leaf spring and the driving safety of the vehicle. Since the maximum stress of the high-strength two-stage gradient stiffness main and auxiliary springs is not only related to the structural parameters and loads of the main spring, the first-l...

Examples

Embodiment

[0060] Embodiment: the width b=63mm of a certain high-strength two-stage gradient stiffness leaf spring, half L of the saddle bolt clamping distance 0 =50mm, elastic modulus E=200GPa, maximum allowable stress [σ]=1200MPa. The total number of pieces of the main and auxiliary springs is N=5, where the number of main reeds 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 design value H of the initial tangent arc height of the main spring gM0 = 112.2 mm. The number of sheets of the first secondary spring m 1 = 1 piece, thickness h A11 =11mm, half of the active length is L A11T =360mm, half of the clamping length L A11 = L A11T -L 0 / 2=335mm; the design value H of the initial tangent arc height of the first secondary spring gA10 = 22.8 mm. The number of pieces of se...

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