Experimental method for measuring distribution of breaking longitudinal force of steel rail of railway
An experimental method and longitudinal force technology, applied in measuring devices, force/torque/work measuring instruments, instruments, etc., can solve the problems of increasing experimental costs, difficult to control the temperature force, unfavorable longitudinal force distribution law of rail fracture, etc. The effect of shortening the experiment time and reducing the experiment cost
Active Publication Date: 2014-04-02
DALIAN UNIV OF TECH
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This method is to lock the rail when the temperature is the highest, and cut the rail when the temperature is the lowest, so as to ensure that there is a large longitudinal temperature force inside the rail before sawing. This experimental method is not only limited by time, but also by natural temperature differences. Limitations, the temperature force inside the rail is difficult to control, and repeated experiments require repeated sawing and welding of the rail, which also increases the cost of the experiment and is not conducive to the study of the distribution of the longitudinal force of the rail fracture
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solution and the drawings.
[0017] The present invention utilizes a rail tensioning machine to prestress the steel rail, and can accurately control the magnitude of the prestressing force through a load cell group installed on the rail, and can be converted to obtain corresponding values according to Hooke’s law and the relationship between solid thermal expansion strain and temperature Rail temperature change amplitude; after releasing the prestress, the force sensor group can measure the rail fracture longitudinal force distribution value under a certain rail temperature change amplitude or tensile stress.
[0018] This example takes the longitudinal force distribution experiment of rail fracture when the rail temperature change amplitude is -21.3℃ as an example. The specific experimental method steps are as follows:
[0019] 1) Install force sensor group ...
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
Login to view more PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
Login to view more
Abstract
The invention discloses an experimental method for measuring distribution of breaking longitudinal force of a steel rail of a railway, relates to the technical field of security detection for railways, and particularly relates to an experimental method for measuring a distribution law of breaking longitudinal force of a steel rail of a railway. The experimental method is characterized in that change of the state of the rail steel is simulated when the rail steel is broken by means of applying prestress on the steel rail and then releasing the prestress, and the distribution of the longitudinal force of the steel rail before and after the prestress is released is measured by a force sensor group to obtain the distribution law of the breaking longitudinal force of the steel rail. The experimental method includes mounting the force sensor group on the long steel rail of a track with a certain length at first; completely releasing fasteners of the long steel rail; applying the certain prestress on the long steel rail by a steel rail stretching machine; locking the fasteners of the long steel rail; finally releasing the prestress; acquiring stress data of the steel rail by a sensing node group and the force sensor group; and transmitting the data to a computer by a wireless gateway to obtain the distribution law of the longitudinal force after the steel rail is broken. By the aid of the method, accurate, controllable and low-cost experiment for distribution of the breaking longitudinal force of the steel rail can be realized.
Description
Technical field [0001] The invention relates to the technical field of railway safety detection, in particular to an experimental method for measuring the distribution law of the longitudinal force of a railway rail fracture. Background technique [0002] Railway is the main method of land transportation in my country. It has the advantages of stable operation, large transportation volume, low energy consumption and light environmental pollution. Rail is an important part of railway structure, and its reliability is the key to ensuring the safety of railway operation. Especially the fast-developing high-speed railways are all seamless lines. The rails of this line cannot expand and contract freely. As the rail temperature changes, a huge longitudinal temperature force will be generated inside the rail, which may cause rail welding. Weak points such as seams and transition sections are broken, threatening driving safety. [0003] The stress method is an important means to detect r...
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
Login to view more Application Information
Patent Timeline
Login to view more Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/00
Inventor 王大志刘冲梁军生戴恒震王立鼎宋晓伟任同群王珂薛松
Owner DALIAN UNIV OF TECH
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Try Eureka
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap