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通过采用BOTDA分布式光纤测试技术与点式测试技术联合实验测试,进行了不同荷载级别下的冻结管的力学性能试验。分析了在各级别荷载下冻结管的变形特性,得出了在荷载作用下冻结管中部是应变和挠度最大的位置,随着荷载的增加呈现出线性变化;沿管长方向应变大致是两侧对称分布,挠度则呈现出抛物线的变化趋势,结果表明BOTDA分布式光纤测试技术较点式测试技术具有优越性,可以实现连续测量,其测试结果更具有代表性,是冻结管力学性能测试的一种新的试验方法。
By using the BOTDA distributed optical fiber testing technology and the point-type testing technology joint experimental test, the mechanical properties of the frozen pipe under different load levels were tested. The deformation characteristics of the frozen pipe under various loads were analyzed. It was found that the middle part of the frozen pipe was the location with the largest strain and deflection under the load, showing a linear change with the increase of load. The strain along both sides of the pipe was approximately Symmetrical distribution and deflection show a trend of parabola. The results show that BOTDA distributed optical fiber testing technology is superior to point-type testing technology and can achieve continuous measurement, the test results are more representative, is a frozen pipe mechanical performance test A new test method.