悬索式跨越架用纤维绳索非线性本构关系试验研究

悬索式跨越架在跨越电力线路施工中应用广泛,其承载索及封网绳多采用超高分子量聚乙烯纤维绳索和聚酯纤维绳索。由于进行悬索式跨越架动力学仿真计算纤维绳索所涉及的非线性本构关系尚无公开资料,各单位在进行仿真计算时采用弹性模量固定值来替代非线性应力—应变关系曲线,导致计算结果与实际情况不符。针对上述问题,对这两种常用规格的纤维绳索开展非线性本构关系试验研究,介绍了试验原理,提出了试验方法,获得了应力—应变曲线、弹性模量—载荷曲线。试验结果表明:两种纤维绳索弹性模量的最大峰值随着直径的增大而减小,与原有推荐的弹性模量经验值存在很大差异。

The Research on Nonlinear Constitutive Relations of Fiber Ropes

Catenary over the shelf across the power lines in the construction of a wide range of applications,the use of rope and network rope and more use of ultra-high molecular weight polyethylene fiber ropes and polyester ropes.Because of the lack of public information on the nonlinear constitutive relations involved in the fiber ropes during the simulation calculation of cable-stayed overlay,every unit adopts the fixed value of elastic modulus instead of the nonlinear stress-strain curve.Resulting in the calculation results and the actual situation does not match.In view of the above problems,this paper conducts nonlinear constitutive relationship tests on the two commonly used specifications of fiber ropes,introduces the principle of the test,presents the test method,and obtains the stress-strain curve and the elastic modulus-load curve.The experimental results show that the maximum peak value of the elastic modulus of the two kinds of fiber rope decreases with the increase of the diameter,which is different from the original recommended value of the elastic modulus.