A quantitative approach for guiding the optimal structural design of multi-strand ropes with hierarchical helical structures has been developed. The structural pattern is optimized to maximize the capacity to bear axial loads and minimize the global toque of the rope simultaneously. In the light of the hierarchical calculation method for calculating the internal forces of wire ropes, a procedure of structural optimization is proposed for the multi-strand ropes. Two typical multi-strand wire ropes, namely 7 × 7 and 19 × 7 ropes, are treated in detail. The favorable structural patterns are identified, providing a database that covers most practical applications. It is demonstrated that the crisscross arrangement of strands or wires within the multi-strand ropes is beneficial for achieving a torque-balanced state. The influence of structural parameters on the global mechanical behavior of ropes increases gradually from inner strands to outer strands. The initial helix angle of the outer strands has a significant effect on the axial stiffness of the wire ropes.

已经开发出一种定量的方法来指导具有分层螺旋结构的多股绳索的最佳结构设计。对结构模式进行了优化，以最大程度地承受轴向载荷，同时最小化绳索的整体扭矩。根据钢丝绳内力的分层计算方法，提出了一种多股钢丝绳的结构优化程序。详细介绍了两条典型的多股钢丝绳，即7×7和19×7钢丝绳。确定了有利的结构模式，从而提供了涵盖大多数实际应用的数据库。已经证明，在多股绳索内的股线或金属丝的交叉布置对于实现扭矩平衡状态是有利的。结构参数对钢丝绳整体力学性能的影响从内层股线到外层股线逐渐增加。外股线的初始螺旋角对钢丝绳的轴向刚度有重要影响。