Calculation Method of Stiffness Characteristics of High-Strength Three-Stage Gradient Stiffness Leaf Spring
A technology of stiffness characteristics and calculation methods, applied in the field of vehicle suspension leaf springs, can solve the problems of not giving the stiffness characteristics of high-strength three-stage gradient stiffness leaf springs, and the complexity of high-strength three-stage gradient leaf springs
Inactive Publication Date: 2019-11-05
SHANDONG UNIV OF TECH
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[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. , the stiffness characteristics of the high-strength three-stage gradient leaf spring are not only related to the structure of the main spring and auxiliary springs at all levels, but also related to the contact load. Therefore, the calculation of the deflection and stiffness characteristics of the high-strength three-stage gradual leaf spring is very complicated , according to the research data, there is no reliable calculation method for the stiffness characteristics of high-strength three-stage gradient stiffness leaf springs at home and abroad.
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[0036] 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 L A11T =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 ...
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The invention relates to a calculation method for the stiffness characteristics of a high-strength three-stage gradually changing stiffness leaf spring, and belongs to the technical field of leaf springs for vehicle suspension. According to the structural parameters, modulus of elasticity, rated load, and each contact load of each main spring and secondary spring of the high-strength three-stage gradient stiffness leaf spring, the present invention can control the high-strength three-stage gradient stiffness leaf spring under different loads. The stiffness properties are calculated. Through the prototype test, it can be seen that the calculated values of the stiffness characteristics under different loads are consistent with the test values of the prototype test, indicating that the calculation method of the stiffness characteristics of the high-strength three-stage gradient stiffness leaf spring is correct, and it is a high-strength three-stage gradient The design of stiffness leaf spring and the calculation of stiffness characteristics have laid a reliable technical foundation. Using this method, a reliable calculated value of the stiffness can be obtained, which can ensure that the leaf spring meets the design requirements of the suspension bias frequency, and improve the ride comfort of the vehicle; at the same time, it can reduce design and test costs and speed up product development.
Description
technical field [0001] The invention relates to a calculation method for the stiffness characteristics of a leaf spring of a vehicle suspension, especially a leaf spring with a high-strength three-stage gradually changing stiffness. 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. , the stiffness characteristics of the high-strength three-stage gradient leaf spring are not only related to the structure of the main spring and auxiliary springs at all levels, but also related to the contact load. Therefore, the calculation of the deflection and stiffness characteristics of the high-strength three-stage gradual leaf spring is very complicated , according to the information we have found, there is no reliable calculation me...
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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20
Inventor 周长城于曰伟马驰骋汪晓杨腾飞王凤娟邵明磊
Owner SHANDONG UNIV OF TECH