Method for calculating maximum radial stress of unequal-thickness annular valve slice of hydro-pneumatic spring

A radial stress, oil and gas spring technology, applied in the field of oil and gas springs, can solve problems such as lack of analytical calculation formulas

Active Publication Date: 2015-12-16
SHANDONG UNIV OF TECH
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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 oil-gas springs and unequal-thickness annular valve plates. Currently, the maximum radial stress is calculated by sol

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  • Method for calculating maximum radial stress of unequal-thickness annular valve slice of hydro-pneumatic spring
  • Method for calculating maximum radial stress of unequal-thickness annular valve slice of hydro-pneumatic spring
  • Method for calculating maximum radial stress of unequal-thickness annular valve slice of hydro-pneumatic spring

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Embodiment Construction

[0026] specific implementation plan

[0027] The present invention will be further described in detail through an embodiment below.

[0028] The oil and gas spring of a special vehicle adopts annular valve discs of unequal thickness, the elastic modulus E = 200GPa, Poisson's ratio μ = 1 / 3, and the thickness of the equal thickness part is h 0 =0.3mm, variable thickness radius r t =7.3mm, effective inner circle radius r a =5.0mm, outer circle radius r b =8.5mm, the uniform pressure received is p=3.0MPa.

[0029] The calculation method of the maximum radial stress of the oil-gas spring unequal thickness annular valve plate provided by the example of the present invention, its calculation flow chart is as follows figure 1 As shown, the mechanical model of the oil-gas spring unequal-thickness annular valve plate is as follows figure 2 As shown, the specific steps are as follows:

[0030] (1) Determine the constant term X formed by the maximum radial stress coefficient of the...

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Abstract

The invention relates to a method for calculating the maximum radial stress of an unequal-thickness annular valve slice of a hydro-pneumatic spring and belongs to the technical field of hydro-pneumatic suspensions. Previously, no reliable calculation method has been developed for the maximum radial stress of the unequal-thickness annular valve slice of the hydro-pneumatic spring, and generally, finite element software is utilized to simulate the maximum radial stress under a given pressure, which fails in meeting the requirements of modern CAD deign of the hydro-pneumatic spring. The method for calculating the maximum radial stress of the unequal-thickness annular valve slice of the hydro-pneumatic spring is capable of realizing accurate and fast calculation of the maximum radial stress of the unequal-thickness annular valve slice according to the structural parameters and material property parameters of the unequal-thickness annular valve slice of the hydro-pneumatic spring. Compared with an ANSYS simulation result, the calculation method is accurate and reliable; as a result, a reliable maximum radial stress calculation method is provided for realizing the modern CAD design of the hydro-pneumatic spring and the stress strength calculation of the unequal-thickness annular valve slice.

Description

technical field [0001] The invention relates to an oil-gas spring, in particular to a method for calculating the maximum radial stress of an oil-gas spring with unequal thickness annular valve plates. Background technique [0002] For the maximum radial stress of the oil-gas spring unequal-thickness annular valve plate, there is no accurate and reliable calculation method at home and abroad. Most of them use finite element simulation software to establish the entity Numerical simulation of the model can obtain an approximate numerical solution, but a solid model needs to be established and accurate analytical formulas and calculation methods cannot be provided. Since the damage of the unequal-thickness annular valve plate of the oil-gas spring is not only affected by the circumferential stress, but also affected by the radial stress, the unequal-thickness annular valve plate will break along the inner circumference, mainly because the unequal-thickness annular valve The max...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 周长城赵雷雷潘礼军邵明磊王凤娟于曰伟
Owner SHANDONG UNIV OF TECH
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