Method for calculating radial stress of annular valve plate of vibration absorber

A radial stress and calculation method technology, applied in the field of hydraulic shock absorbers, can solve problems such as lack of accurate analytical calculation formulas or methods, and failure to satisfy shock absorbers, and achieve the effect of a reliable calculation method

Inactive Publication Date: 2013-05-15
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. The current finite element simulation software performs numerical simulation calculation of radial stress through solid modeling. Lack of accurate analytical calculation formulas or methods, which 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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  • Method for calculating radial stress of annular valve plate of vibration absorber
  • Method for calculating radial stress of annular valve plate of vibration absorber
  • Method for calculating radial stress of annular valve plate of vibration absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 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.

[0037] The calculation method of the radial 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:

[0038] (1) Determine the constant terms of the radial stress coefficient of the valve plate E 1 , E 2 , E 3 and E 4 :

[0039] 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 constants formed by the radial stress coefficient of the valve plate under uniform pressure E 1 , E 2 , E 3 and E 4 ,which is:

[0040] , ,

[0041] ,

[0042] = ;

[0043] In t...

Embodiment 2

[0060] 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.

[0061] 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 constants formed by the radial stress coefficient of the annular valve plate E 1 , E 2 , E 3 and E 4 and at any radius r Radial Stress Coefficient for Location It is also exactly the same as that of Example 1;

[0062] According to the thickness of the ring valve plate of the shock absorber h =0.2mm, uniform pressure p =1.352115MPa, and the radial stress coefficient of the annular valve plate at any radial position , the calculated radial stress of the annular valve plate ...

Embodiment 3

[0065] 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.

[0066] 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 radial stress coefficient of the annular valve plate E 1 , E 2 , E 3 and E 4 ,which is:

[0067] , ,

[0068] ,

[0069] = ;

[0070] In the formula, , , , , , , , ;

[0071] The radial stress coefficient of the shock absorber annular valve plate calculated in this embodiment with radius r ( ) change curve, such as Figure 9 Shown, inner circle radius = Radial stress coefficient at 5.0mm = mm 2 / N= ; when pressure p =3.0MPa, the radial stress on the shock absorber valve plate...

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Abstract

The invention relates to a method for calculating the radial stress of an annular valve plate of a vibration absorber, and belongs to the technical field of vibration absorbers. At present, no reliable calculation method is provided for the radial stress of the annular valve plate of the vibration absorber; and most methods are used for value simulation of the radial stress under the given valve plate structure and the given pressure by using ANSYS and cannot meet requirements on the modern computer aided design (CAD) of the vibration absorber, strength checking of the annular valve plate and splitting design. By the calculation method, the radial stress at any radius position and the maximum radial stress at the inner circle radius ra according to a structural parameter and a material performance parameter of the annular valve plate of the vibration absorber. According to an ANSYS simulation result, the method for calculating the radial stress of the annular valve plate of the vibration absorber is precision; and the reliable method for calculating the radial stress is supplied to the modern CAD design and the stress strength checking of vibration absorber and the annular superposed valve plate.

Description

technical field [0001] The invention relates to a hydraulic shock absorber, in particular to a calculation method for the radial stress of an annular valve plate of the shock absorber. Background technique [0002] For the calculation of the radial 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 circumferential stress, but also by the radial stress, the shock absorber valve plate will break along the inner circumference, mainly because the radial stress on the valve plate exceeds stress ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 周长城李红艳解加报
Owner SHANDONG UNIV OF TECH
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