摘要
根据弹性约束下钢轨受力形变的力学模型,研究并得到了弹性约束下钢轨受力形变的一般规律,分别给出了低温收缩和高温膨胀两种情形下,钢轨挠度随外力、温度力及端部约束强度的变化曲线,还讨论了零温度力及两种极端约束条件下的挠度曲线,为光纤光栅传感器在无缝钢轨线路安全监测中的应用奠定了基础.
Base on the mechanical model of stress deformation of seamless steel rail with elastic constraints,we have investigated the general rule of stress deformation of seamless steel rail with elastic constraints,and obtained the change rule of the steel rail deflection with external force,temperature force and constraint strength at the two ends of seamless steel rail in the cases of shrinkage at low temperature and expansion at high temperature.Moreover,we have also discussed the deflection curve under zero-temperature force and two kinds of extreme constraints.These results will lay the foundation for the applications of fiber Bragg grating sensors in the safety monitoring of seamless steel rails.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2013年第4期499-502,523,共5页
Engineering Journal of Wuhan University
基金
国家863计划资助课题(编号:2013AA06A411)
关键词
钢轨
弹性约束
温度力
挠度曲线
seamless steel rail
elastic constraints
temperature force
deflection curve
