张若瑜^{1, 2}，赵凤帅^{1, 2}，林风梅³，郄亚克³，李 焱^{1, 2}
AuthorsHTML:张若瑜^{1, 2}，赵凤帅^{1, 2}，林风梅³，郄亚克³，李 焱^{1, 2}
AuthorsListE:Zhang Ruoyu ^{1, 2}，Zhao Fengshuai ^{1, 2}，Lin Fengmei³，Qie Yake³，Li Yan ^{1, 2}
AuthorsHTMLE:Zhang Ruoyu ^{1, 2}，Zhao Fengshuai ^{1, 2}，Lin Fengmei³，Qie Yake³，Li Yan ^{1, 2}
Unit:1. 天津大学建筑工程学院，天津 300072；
2. 天津大学天津市港口与海洋工程重点实验室，天津 300072；
3. 巨力索具股份有限公司，保定 072550
Unit_EngLish:1. School of Civil Engineering，Tianjin University，Tianjin 300072，China；
2. Tianjin Key Laboratory of Port and Ocean Engineering，Tianjin University，Tianjin 300072，China；
3. Juli Sling Co.，Ltd.，Baoding 072550，China
Abstract_Chinese:针对国内研究易忽视的钢缆扭转特性，建立了不同编制型式钢缆的拉伸-扭转模型. 首先，分析钢缆结构特性、钢丝材料性质等基本特征，明确其在海洋工程中的受力状态，并基于合理假设，将钢缆应力分布问题简化为几何问题，确定拉伸-扭转共同作用下的钢缆本构关系. 在此基础上，针对钢丝之间的不同接触特点，将赫兹接触理论推广到钢缆的数值模拟中，建立点接触和线接触的接触应力求解方法. 其次，基于非线性动力学理论，考虑外载荷作用，并在钢缆刚度中引入拉伸-弯曲-扭转耦合项，推导钢缆动力学平衡方程组. 在此基础上，建立了系泊系统计算模型，得出外载荷作用下的钢缆动力响应，并分析了在轴向载荷作用下，钢缆的扭转特性对张力的影响. 此外，还研究了不同编制型式钢缆的扭转作用对缆绳动内力的影响，得出张力变化规律. 结果表明：在相同轴向载荷下，不同编制型式钢缆的动力响应不同；不同的编制型式会影响张力数值，与忽略扭转特性时得出的张力相比，考虑钢缆结构扭转特性时计算出的张力增大，并且增大的数值受编制型式影响；不同编制型式会导致截面应力分布不均匀，钢缆内部应力分布与其编制型式密切相关，因此，在对钢缆进行应力计算，特别是接触应力分析时，考虑其具体编制型式极为必要，6×19型钢缆由于自身钢丝左捻右捻的交互排列型式，受到外载荷时的响应较低.
Abstract_English:Given that the torsion characteristics of rope have seen little research domestically，in this paper，tension-torsion models of different types of wire ropes were established. The basic characteristics of wire rope structure and steel wire material were analyzed，including the force of wire ropes in marine engineering. Based on reasonable assumptions，the stress distribution of wire ropes was simplified into a geometric problem，and the response characteristics of wire ropes under the joint action of tension and torsion were determined. In view of the different contact characteristics between steel wires，the Hertz contact theory was incorporated into numerical simulation of wire ropes，and the method of contact stress solutions of point and line contact was established. Based on the theory of nonlinear dynamics，the coupling terms of tension，bending and torsion were introduced into the stiffness of wire ropes，and the equations of dynamic equilibrium were derived. A model for the calculation of a mooring system was established to obtain the rope dynamic response under the external load. The influence of the torsion of the rope on the tension under axial load was analyzed. The influence of torsion on the internal force of the rope was also studied，and a law of tension variation was established. Study results showed that the response of different types of wire ropes，including the tension value，varied under the same axial load. Compared with the values obtained when torsion was neglected，the tension values calculated for the different rope types were larger and varied by rope type. Cross-sectional stress distribution was not uniform for the different types. The distribution of internal stress in wire rope was closely related to the type of rope，so it is very important to consider the specific type in the calculation of stress，especially in the analysis of contact stress. The 6×19 type had a lower response when subjected to external load due to the alternating arrangement of left and right twisting.
Keyword_Chinese:钢制系缆；动力响应；拉伸-扭转特性；编制型式
Keywords_English:mooring wire rope；dynamic response；tensile-torsional characteristic；type of wire rope

PDF全文下载地址:http://xbzrb.tju.edu.cn/#/digest?ArticleID=6504