摘要
拉索是由钢丝通过一定方式绕捻组合而成,其力学性能是其组成钢丝性能以及相互间组合受力的综合体现.基于不同拉索的绞捻特性,提出拉索半精细化有限元模型,使用倾斜且旋转排列的短梁来模拟绕捻钢丝,并通过节点耦合的方式模拟钢丝之间的相互作用关系.结果表明:该方法能够得到拉索的整体组合性能以及组成钢丝的内力分布,并且计算简单高效.在轴向力作用下,内部钢丝受力较大,越往外圈受力越小.基于有限元的概率计算和敏感性分析能够反映出钢丝材料不定性对于拉索整体机械性能的影响.
A cable is made up of spiral wires with certain winding methods, and the mechanical properties are deter- mined by the inside wires and the interactions between those wires. Based on the winding characteristics of different cables, a refined simplified finite element analysis （FEA） model is proposed to simulate the helical wires and the in- teractions between them. Stecl wircs are simulated by helically placed short beam elements to achieve a slight twist angle, and nodes at cable section of each finite piece are coupled to ensure the interaction. Results show that the FEA method can help analyze cables＇ mechanical properties and wire force distributions with a high efficiency. When under axial loading, wire in the center has the highest force and the wire force decreases from the inside to the outside rings. FEA based probability design and sensitivity analysis can reflect the influencing factors and effect of wire mechanical uncertainties on the cable behaviors.
出处
《天津大学学报（自然科学与工程技术版）》
EI
CAS
CSCD
北大核心
2015年第B07期96-101,共6页
Journal of Tianjin University：Science and Technology
基金
国家自然科学基金资助项目(51478310
51208355)
关键词
拉索
绞捻特性
半精细化有限元模型
敏感性分析
cable
winding characteristics
refined simplified finite element model
sensitivity analysis
