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Analyse about the Principle and Cause of CWR Stress-free Temperature Attenuation

Author: YuXing
Tutor: LianSongLiang；GongPeiYi
School: Tongji University
Course: Road and Railway Engineering
Keywords: CWR Rail locking temperature Attenuation Analysis
CLC: U213.9
Type: Master's thesis
Year: 2008
Downloads: 71
Quote: 3
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Abstract


CWR rail temperature is a benchmark to measure the level of CWR rail temperature force , it reflects a seamless line under different temperature conditions of the state of stress in the rail longitudinal and size . Lock the bearing capacity of the rail temperature and the track bed aspect of the track bed to the resistance, and so constitute quantitative indicators to measure the strength and stability of CWR track rail locking temperature is the most important one of the technical data of the CWR , its accuracy or not, will be directly related to the structural state of the CWR stability and support, and tube repair safety . In this paper, the 1999 Shanghai Railway Bureau, Hangzhou line bridge overhaul segment mechanical layout of the Shanghai-Nanjing line the long rail length change data line repair and synchronization replace the a sleeper type III construction has accumulated the attenuation of rail elongation and rail locking temperature variation , and residual stress from the rail manufacturing , plastic grind long plastic creep the CWR length change , lock rail temperature attenuation was further qualitative analysis , so as to correctly understand the sutureless Road, locking the actual rail temperature , establishing reasonable CWR conservation , management and maintenance system to provide a theoretical and practical guidance . The exploration of rail locking temperature attenuation law is a very difficult , tedious and very important , serious things , especially from a theoretical quantitative analysis , yet we need to continue to carry out in-depth exploration and research . I will take advantage of the next phase of the railway construction unit engaged in a speed of 200km of new line construction management work conditions , combined with the new line disposable laying CWR , the the early trains a small number of actual situation , following in-depth lock the rail temperature accurately control study : 1 . CWR laying methods and stable conditions of the track bed rail locking temperature accuracy ; 2 . the wheel loads role rail locking temperature attenuation relationship analysis; 3 . temperature stress alternating role the rail locking temperature attenuation relationship analysis .

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CLC: > Transportation > Rail transport > Railway Line Project > Line constructed > CWR
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