Method for measuring pretension of tensioned membrane structure

A measurement method and pre-tension technology, applied in tension measurement and other directions, can solve the problems of difficult measurement of film amplitude T, difficulty in developing measurement instruments, and difficulty in obtaining the center point, so as to save measurement cost and measurement time, save research and development costs, The effect of reducing the difficulty of research and development
CN102032968BInactive Publication Date: 2012-08-01CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING UNIV
Publication Date
2012-08-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for measuring pretension of a tensioned membrane structure, which comprises the following steps of: 1. shooting a particle globule into a tension membrane surface with a fixed border and rebounding the globule; 2. meanwhile, measuring the shooting speed v0 and the back-shooting speed vt of the globule in the tension membrane surface with a fixed border; 3. measuring the shooting speed v0 and the back-shooting speed vt of the globule in the tension membrane surface with the same fixed border; shooting the same point of the membrane surface at different shooting speed and measuring the other group on shooting speed v'0 and back-shooting speed v't; 4. substituting the two groups of shooting speed and back-shooting speed (v0, vt) and (v'0, v''t) into the formula vt = k'v0+c=f(sigma0x, sigma0y) v0+g (sigma0x, sigma0y) and solving to obtain k' and c; and 5. obtaining the pretensions sigma0x and sigma0y of a membrane material by searching the regression coefficient table of vt=k'v0+c under the membrane material pretension grade. By means of the method in the invention, based on numerical analysis and theoretical demonstration, the direct relation among shooting speed, back-shooting speed and membrane surface pretension is found out, a specific method is provided for obtaining the pretension of the membrane material just by measuring shooting speed and back-shooting speed, and the feasibility of the method is verified by calculation instances.
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Description

technical field

[0001] The invention belongs to the technical field of engineering measurement and monitoring, and in particular relates to a method for measuring the pretension of a building tensile membrane structure. Background technique

[0002] The membrane structure originated from ancient tents. The earliest records include animal skin shelters in Ukraine 100,000 years ago, and black tents in Afghanistan in the 18th century. The modern membrane structure is a new form of architectural structure, which integrates architecture, structural mechanics, fine chemicals, material science, computer technology, etc., and has a high technical content. Membrane materials have become one of the main building materials. According to the combination form of the membrane structure, the membrane structure can be divided into an inflatable membrane structure, a skeleton-supported membrane structure, a cable-membrane dome structure, and a tensioned membrane structure. The tensioned mem...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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