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Computing method for circumferential stress of absorber annular valve sheet

A technology of circumferential stress and calculation method, which is applied in the field of hydraulic shock absorbers, can solve problems such as lack of analytical calculation formulas or methods, unsatisfactory problems, etc., and achieve the effect of reliable calculation method and fast calculation

Inactive Publication Date: 2013-05-22
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of the automobile industry and the continuous improvement of driving speed, higher requirements are put forward for the design of shock absorbers and throttle valve plates. However, the current finite element simulation software lacks accurate numerical simulation calculations for circumferential stress. Analytical calculation formulas or methods cannot meet the requirements of the rapid development of the modern automobile industry and the modern CAD design of shock absorbers

Method used

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  • Computing method for circumferential stress of absorber annular valve sheet
  • Computing method for circumferential stress of absorber annular valve sheet
  • Computing method for circumferential stress of absorber annular valve sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment one: The thickness of a shock absorber valve plate h =0.3mm, inner circle radius =5.0mm, outer circle radius =8.5mm, Poisson's ratio mu =0.3, the uniform pressure is p =1.0MPa, p =2.0MPa and p =3.0MPa.

[0038] The calculation method of the circumferential stress of the shock absorber annular valve plate provided by the example of the present invention, the calculation process is as follows figure 1 As shown, the specific steps are as follows:

[0039] (1) Determine the constant terms of the circumferential stress coefficient of the annular valve plate:

[0040] According to the radius of the inner circle of the damper valve plate =5.0mm, outer circle radius =8.5mm, elastic modulus E =2.0 and Poisson's ratio mu =0.3, to determine the various constants formed by the circumferential stress coefficient of the annular valve plate under uniform pressure E 1 , E 2 , E 3 and E 4 ,which is:

[0041] , ,

[0042] ,

[0043] = ...

Embodiment 2

[0061] Embodiment two: The inner radius, outer radius and material properties of the annular valve plate of a certain shock absorber are exactly the same as those in Example 1, and the thickness of the annular valve plate is h =0.2mm, uniform pressure p =1.352115MPa.

[0062] Using the calculation steps of Embodiment 1, since the inner circle radius, outer circle radius and material properties of the annular valve plate of the shock absorber are exactly the same as those of Embodiment 1, the various constants formed by the circumferential stress coefficient of the annular valve plate E 1 , E 2 , E 3 and E 4 and at any radius r Circumferential Stress Coefficient of Location It is also exactly the same as that of Example 1;

[0063] According to the thickness of the ring valve plate of the shock absorber h =0.2mm, uniform pressure p =1.352115MPa, and the circumferential stress coefficient of the annular valve plate at any radial position , the calculated circumf...

Embodiment 3

[0066] Embodiment three: The thickness of a shock absorber annular valve plate h =0.3mm, inner circle radius =5.0mm, outer circle radius =8.75mm, Poisson's ratio mu =0.3, uniform pressure p =3.0MPa.

[0067] Using the calculation steps of Embodiment 1, according to the inner circle radius of the shock absorber annular valve plate =5.0mm, outer circle radius =8.75mm, Poisson's ratio mu =0.3, to determine the various constants formed by the circumferential stress coefficient of the annular valve plate E 1 , E 2 , E 3 and E 4 ,which is:

[0068] , ,

[0069] ,

[0070] = ;

[0071] In the formula, , , , , , , , ;

[0072] The calculated circumferential stress coefficient of the annular valve plate of the shock absorber with radius r ( ) change curve, such as Figure 9 Shown, inner circle radius = Circumferential stress coefficient at 5.0mm = mm 2 / N= ; when pressure p =3.0MPa, respectively for the circumferential...

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Abstract

The invention relates to a computing method for circumferential stress of an absorber annular valve sheet, and belongs to the technical field of absorbers. No reliable computing method is put forward for circumferential stress of the absorber annular valve sheet in the prior art. The computing method for circumferential stress of the absorber annular valve sheet is characterized in that the following steps are adopted: 1) each constant term composed of the circumferential stress coefficient of a valve sheet is confirmed; 2) the circumferential stress coefficient G sigma theta r at any position of radius r is computed; 3) the circumferential stress sigma theta r at any position of the radius r of the absorber annular valve sheet is computed. By means of the computing method for circumferential stress of the absorber annular valve sheet, the circumferential stress sigma theta r at any position of the radius and the maximum circumferential stress sigma theta r max at the position of the inner circle radius ra can be accurately computed. The result of the ANSYS emulation proof proves that the computing method for circumferential stress of the absorber annular valve sheet is accurate, so that the reliable circumferential stress computing method is provided for splitting design and stress intensity check of the absorber annular valve sheet.

Description

technical field [0001] The invention relates to a hydraulic shock absorber, in particular to a calculation method for the circumferential stress of an annular valve plate of the shock absorber. Background technique [0002] For the calculation of the circumferential stress of the annular valve plate of the shock absorber, there is no accurate and reliable calculation method at home and abroad. Most of them use finite element simulation software to carry out numerical simulation on the valve plate under a given pressure by establishing a solid model, which can be obtained Reliable numerical solution, but requires the establishment of a solid model and cannot provide accurate analytical calculation formulas and calculation methods. Since the damage of the damper valve plate is not only affected by the radial stress, but also by the circumferential stress, the shock absorber valve plate will break along the radial direction, mainly because the circumferential stress on the valv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 周长城提艳宋群
Owner SHANDONG UNIV OF TECH
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