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Method for calculating combined stress of valve plate of shock absorber under arbitrary axisymmetric and non-uniform pressure

A technology of non-uniform pressure distribution and composite stress, which is applied in the field of hydraulic shock absorbers, can solve the problem that the shock absorber valve plate is broken, it is difficult to meet the precise design and strength check of the shock absorber and superimposed valve plate, and there is no accurate, Reliability and other issues

Inactive Publication Date: 2014-03-12
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to realize the stress intensity calculation of the shock absorber valve plate under any axisymmetric non-uniform pressure, it is necessary to solve the calculation problem of the composite stress of the valve plate first, and the composite stress will cause the shock absorber valve plate to break at the radius of the inner circle
However, at present, there is no accurate and reliable calculation method for the calculation of the composite stress of the shock absorber valve plate under the axisymmetric non-uniform pressure at home and abroad, and most of them are based on the uniform pressure on the shock absorber valve plate Composite stress is calculated, because there is a certain difference between the calculated composite stress value of the valve plate and the actual value, therefore, it is difficult to meet the requirements of precise design and strength check of the shock absorber and superimposed valve plate

Method used

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  • Method for calculating combined stress of valve plate of shock absorber under arbitrary axisymmetric and non-uniform pressure
  • Method for calculating combined stress of valve plate of shock absorber under arbitrary axisymmetric and non-uniform pressure
  • Method for calculating combined stress of valve plate of shock absorber under arbitrary axisymmetric and non-uniform pressure

Examples

Experimental program
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Effect test

Embodiment 1

[0059] Example 1: The radius of the inner circle of a certain shock absorber annular valve plate =5.0mm, outer circle radius =8.5mm, elastic modulus E =2.0 and Poisson's ratio mu =0.3, thickness h =0.3mm, valve port radius r o =8.0mm, apply uniform pressure in the radius [5.0,8.0]mm section p 0 =3.0MPa, apply linear non-uniform pressure on the [8.0,8.5]mm section p ( r )= MPa, calculate the composite stress of the shock absorber valve plate under this pressure.

[0060] The calculation method of the composite stress of the damper valve plate under any axisymmetric non-uniform pressure provided by the example of the present invention, the calculation process is as follows figure 2 As shown, the specific steps are as follows:

[0061] (1) Determined at the radius r j The microannular pressure proportional coefficient at :

[0062] According to non-uniform pressure p ( r )= MPa and its maximum value is p 0 =3.0MPa, the radius of the inner circl...

Embodiment 2

[0097] Embodiment 2: The thickness of a shock absorber valve plate h =0.3mm, inner circle radius =5.0mm, outer circle radius =8.5mm, elastic modulus E =2.0 and Poisson's ratio mu =0.3, in [ , ] within the range of the secondary non-uniform pressure MPa, calculate the composite stress of the shock absorber valve plate under this pressure.

[0098] The calculation steps of Embodiment 1 are adopted, namely:

[0099] (1) Determined at the radius r j The microannular pressure proportional coefficient at :

[0100] According to non-uniform pressure MPa and its maximum value is p 0 =3.0MPa, the radius of the inner circle of the shock absorber valve plate =5.0mm, outer circle radius =8.5mm, the radius interval [ ] are equally divided into 70 parts, the micro-ring spacing =0.05mm, ( j =1, 2, 3, ..., 70), radius r j The radius of the inner circle of the microring = r j , outer circle radius , ( j =1,2,…,70), determined in the radius r ...

Embodiment 3

[0120] Embodiment 3: The structural parameters and material characteristic parameters of a damper valve plate are the same as those in Embodiment 1, that is, the thickness h =0.3mm, inner circle radius =5.0mm, outer circle radius =8.5mm, elastic modulus E =2.0 and Poisson's ratio mu =0.3, in [ , ] within the range of applied sinusoidal non-uniform pressure MPa, calculate the composite stress of the shock absorber valve plate under this pressure.

[0121] The calculation steps of Embodiment 1 are adopted, namely:

[0122] (1) Determined at the radius r j The microannular pressure proportional coefficient at :

[0123] According to non-uniform pressure MPa and its maximum value is p 0 =3.5MPa, the radius of the inner circle of the shock absorber valve plate =5.0mm, outer circle radius =8.5mm, the radius interval [ ] are equally divided into 70 parts, the micro-ring spacing =0.05mm, ( j =1, 2, 3, ..., 70), radius r j The radius of th...

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Abstract

The invention relates to a method for calculating the combined stress of a valve plate of a shock absorber under an arbitrary axisymmetric and non-uniform pressure, belongs to the technical field of the shock absorber and solves the problem that a reliable calculation method for the combined stress of the valve plate of the shock absorber under the arbitrary axisymmetric pressure is not disclosed in China and abroad. The method is characterized by comprising the following steps: dividing the arbitrary non-uniform pressure into a plurality of micro-ring pressures, and determining the proportionality coefficient of each micro-ring pressure; carrying out multiplying and superposition on a combined stress coefficient under the micro-ring pressures and the proportionality coefficients of the micro-ring pressures, so as to obtain a 'pressure-combined stress influence' coefficient of the valve plate at an arbitrary radius, thereby realizing calculation to the combined stress of the valve plate, at the arbitrary radius, of the shock absorber under the arbitrary axisymmetric and non-uniform pressure. According to the embodiment and ANSYS simulation verification, the calculation method is accurate, and a reliable calculation method for the combined stress of the valve plate of the shock absorber under the arbitrary axisymmetric and non-uniform pressure is provided to the accurate design and intensity check of the shock absorber and a sandwich valve plate.

Description

technical field [0001] The invention relates to a hydraulic shock absorber, in particular to a method for calculating the composite stress of a shock absorber valve plate under any axisymmetric non-uniform pressure. Background technique [0002] Due to the influence of the normal through hole and the annular gap, the annular valve plate of the shock absorber is actually subjected to non-uniform pressure, and may even be irregularly distributed. However, in order to realize the stress intensity calculation of the shock absorber valve plate under any axisymmetric non-uniform pressure, it is necessary to solve the calculation problem of the composite stress of the valve plate first, and the composite stress will cause the shock absorber valve plate to break at the radius of the inner circle . However, at present, there is no accurate and reliable calculation method for the calculation of the composite stress of the shock absorber valve plate under the axisymmetric non-uniform ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 周长城赵雷雷宋群
Owner SHANDONG UNIV OF TECH
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