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A Design Method of Gas Elastic Piston Model Based on Gas Internal Pressure

A technology of aero-elastic model and design method, which is applied to the design field of large-scale gas tank piston aero-elastic model based on gas internal pressure, can solve problems such as unreasonableness, and achieve the effects of convenient production and processing and simple test method.

Inactive Publication Date: 2017-03-08
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When designing the aeroelastic model, the pressure of the gas has a direct impact on the stiffness of the piston. If this stiffness is ignored, the piston and the cabinet can only contact through smooth guide rails, which is obviously unreasonable.

Method used

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  • A Design Method of Gas Elastic Piston Model Based on Gas Internal Pressure
  • A Design Method of Gas Elastic Piston Model Based on Gas Internal Pressure
  • A Design Method of Gas Elastic Piston Model Based on Gas Internal Pressure

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] A method for designing a large-scale gas holder piston aeroelastic model based on gas internal pressure, the method includes the following steps:

[0037] 1) Make a large piston gas holder, such as figure 1 As shown: make a cylinder and use the cylinder as the gas cabinet body 1; set a smooth guide rail in the vertical direction on the inner wall of the gas cabinet body 1, install the piston 2 in the gas cabinet body 1, and the piston 2 passes through the guide rail in the In the vertical direction, it slides and fits with the inner wall of the gas cabinet body 1 , and the piston 2 forms an airtight seal with the inner wall of the gas cabinet body 1 . The mass of the piston is m, the vertical stiffness between the piston and the guide rail is k, the vertical damping ratio between the piston and the guide rail is c; the volume ...

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Abstract

The invention discloses a large gas chamber piston aeroelastic model design method based on coal gas internal pressure. The large gas chamber piston aeroelastic model design method comprises the following steps of establishing a free vibration equation of a piston under the condition of pneumatic rigidity of the coal gas internal pressure, using a vertical spring to replace the pneumatic rigidity of the piston to the coal gas internal pressure and evenly arranging n springs on the inner wall of a gas chamber body in the circumference direction, wherein the rigidity of each spring km is shown in the description. By means of the method, rigidity simulation of the piston under the internal pressure is firstly achieved, and a basis is provided for design of a complete aeroelastic model of a gas chamber.

Description

technical field [0001] The invention relates to a large-scale gas holder piston aeroelastic model test method, in particular to a method for designing a large gas holder piston aeroelastic model based on gas internal pressure. Background technique [0002] Large gas tanks are important industrial buildings, and structural damage or abnormal operation may cause major safety accidents and cause huge losses of life and property. Therefore, structural safety is very important. The large gas tank is a pure steel cylinder structure. Due to its relatively large cross-sectional diameter, it will undergo large deformation under the action of wind load, and wind load is its main control load. In order to study the wind-induced vibration characteristics of large-scale gas tanks, Professor Li Zhengnong and Xie Junjun of Hunan University conducted detailed research on it, and also carried out a rigid model pressure test according to the actual project. However, in order to accurately e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/08
Inventor 肖正直李正良汪之松刘欣鹏朱超李应刚温航
Owner CHONGQING UNIV