The relative shift of Bragg center wavelength increased linearly with the change of axial stress, radial stress or temperature, and it kept the linear relationship in a large range.
布喇格中心波长的偏移与轴向应力、径向应力和温度等变化量均呈极好的线性比例关系，且在较大的测量范围内一直保持线性关系。
The change of temperature after or before gas well put into production will result in the variation of tubing string stress and axial deformation.
气井投产前后温度和压力变化会引起油管应力及轴向变形的改变。
The temperature and stress field of wagon wheel under the condition of long ramp way cycle braking in Daqin line have been simulated by using FEM and axial symmetry model.
采用轴对称模型和有限元方法，模拟了大秦线长大坡道循环制动条件下货车车轮温度和应力场，结果表明车轮高应力区出现在辐板上，现行制动条件下车轮强度满足使用要求。
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