锁定温度测定仪的研制工作是铁道部的一项科研任务,由我校与北京局共同承担。锁定温度的测定,实质上是测定钢轨没有温度应力时的温度。但无缝线路在温度应力作用下,由于道床和钢轨扣件的作用,不产生宏观变形(伸缩)。因此无法使用力学上常用的通过测变形的手段来测定温度应力。根据我们所查阅的国外资料来看,无缝线路的温度应力测试问题,基本上还没有解决。 Locking temperature measuring instrument development work is a scientific research mission of the Ministry of Railways, by our school and the Beijing Bureau to share. The determination of the locking temperature is essentially the temperature at which no temperature stress is measured on the rail. However, the seamless line under the effect of temperature stress, due to the role of rail bed and rail fasteners, does not produce macroscopic deformation (telescopic). Therefore, it is impossible to measure the thermal stress by means of measuring deformation which is commonly used in mechanics. According to our access to foreign information, the temperature stress testing of seamless lines, basically has not been resolved.