华南理工大学学报（自然科学版）2025，Vol.53Issue(6)：12-24,13.DOI:10.12141/j.issn.1000-565X.240061
典型接触条件下双层螺旋曲杆束的弯曲特性
Bending Characteristics of 2-Layer Spiral Strand Under Typical Contact Conditions
摘要
Abstract
To study the mechanical behavior of 2-layer spiral strand under tension-bending coupling effect and the cooperative working mechanism of internal wires,inter-wire friction and slip were taken into consideration.Static equilibrium relationships for micro-segments of layer-wire were established and analytically derived under two typi-cal contact conditions:inter-layer contact and coupled contact.At the same time,an improved semi-refined finite element model was proposed for numerical simulation and result comparison.Relative slip direction between wires on two contact conditions were obtained from the distribution of shear force on layer-wire,based on which the axial force limit of layer-wire after sliding was derived according to the equilibrium equation.The bending moment-local curvature relation of spiral strand was obtained by summing the bending moments contributed by each wire under tension-bending coupling effect,and a simplified bending moment-mean curvature relation was proposed to de-scribe bending behavior of the spiral strand.The result shows that there are slip stagnation points on contact sur-face of adjacent wires because layer-wire rotates along the axis of spiral strand periodically,and relative slip direc-tion on both sides of the stagnation point is opposite.The slip stagnation point and initial slip position on contact surface of layer-wire to layer-wire and layer-wire to core-wire are different.When neglecting the progression of in-ternal slip,2-layer spiral strand exhibits the same bending moment-mean curvature relationship under both contact conditions,and the function graph presents a bilinear form.The relative error of the bending deformation results be-fore and after slipping between semi-refined FE model and analytical values is less than 4%,and the extracted rela-tive slip results are in agreement with the analysis conclusions.关键词
螺旋曲杆束/拉-弯耦合/丝间滑移/弯曲特性/接触条件/半精细化有限元模型Key words
spiral strand/tension-bending coupling effect/slippage between wires/bending characteristics/con-tact conditions/semi-refined finite element model分类
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王荣辉,刘锡月,赵勇霖,甄晓霞,张卓杰..典型接触条件下双层螺旋曲杆束的弯曲特性[J].华南理工大学学报（自然科学版）,2025,53(6):12-24,13.基金项目
国家自然科学基金项目(52178138) （52178138）
广东省自然科学基金项目(2024A1515012262)Supported by the National Natural Science Foundation of China(52178138)and the Natural Science Founda-tion of Guangdong Province(2024A1515012262) （2024A1515012262）
