Method and device for obtaining rigidity of air spring

An air spring and stiffness technology, applied in the field of obtaining air spring stiffness, can solve the problem of no simple, fast, time-saving and labor-saving air spring parameter information, etc.

Pending Publication Date: 2019-11-29
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of this application is to provide a method and device for obtaining air spring stiffness, and to solve the technical problem that there is no simple, fast, time-saving and labor-saving air spring parameter information in the prior art

Method used

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  • Method and device for obtaining rigidity of air spring
  • Method and device for obtaining rigidity of air spring
  • Method and device for obtaining rigidity of air spring

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Experimental program
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Embodiment

[0089] Such as figure 1 and figure 2 as shown, figure 1 It is a structural schematic diagram of an air spring in this embodiment, figure 2 It is a schematic diagram of the structure and composition of the rubber airbag of the air spring in this embodiment. The air spring is a fluid-solid coupling system composed of fluid (compressed air inside) and solid (rubber airbag, upper cover, piston, etc.). The air spring includes: a stud 101 , an upper cover plate 102 , a rubber air bag 103 , a buffer block 104 , a piston 105 and a screw hole 106 . The rubber airbag mostly adopts a 2-layer ply structure, and its structure is as follows: figure 2 As shown, it mainly consists of outer cover rubber 201, first ply layer 202, second ply layer 203 and inner lining rubber 204. The non-linear characteristics of the rubber airbag structure and constituent materials make the airbag have strong nonlinear characteristics. .

[0090] Such as image 3 As shown, it is a schematic flow chart...

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Abstract

The invention provides a method and device for obtaining rigidity of an air spring. The method comprises the steps: obtaining a static hysteresis loop of the air spring through an experiment, and drawing a graph to determine the maximum friction force and maximum rigidity of a coulomb friction model; calculating compressed air rigidity and linear elastic rigidity; determining a displacement valuecorresponding to half of the maximum friction force; comparing the calculated static stiffness with the actually measured static stiffness and hysteresis loop and meeting the precision requirement; obtaining the dynamic stiffness of the air spring through an experiment, and subtracting the compressed air stiffness value and the coulomb friction model stiffness value from the dynamic stiffness experiment value to obtain a viscoelastic model stiffness value; subtracting the linear elastic stiffness value to obtain a stiffness contribution value of the fractional derivative model, and fitting bya least square method to obtain a fractional derivative parameter; and comparing the calculated dynamic stiffness value with the actually measured dynamic stiffness value and meeting the precision requirement. The method can effectively identify the parameters of the rubber air bag model, can establish a parameter database, can calculate the rigidity of the air spring and carry out accurate mechanical property matching, facilitates the design and optimization of an air bag process, and improves the research and development level of an enterprise.

Description

technical field [0001] The present application relates to the technical field of air springs, in particular to a method and device for obtaining air spring stiffness. Background technique [0002] Air spring, commonly known as airbag, airbag cylinder, leather bag cylinder, etc., is a spring that is filled with compressed air in a retractable airtight container and uses air elasticity. The air spring is filled with compressed air in a sealed container, and uses the compressibility of the gas to achieve its elastic effect. The air spring has ideal non-linear elastic characteristics. After the height adjustment device is installed, the height of the vehicle body will not change with the increase or decrease of the load. The spring stiffness can be designed to be low, and the ride comfort is good. [0003] The air spring is a fluid-solid coupling system composed of fluid (compressed air inside) and solid (rubber airbag, upper cover, piston, etc.). The rubber airbag mostly adop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 陈俊杰殷智宏匡以顺黄斌张磊付小仔曾祥坤祝建孙
Owner JIANGXI UNIV OF SCI & TECH
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