柔性环形防护网顶破受力归一化分析

PDF(3550 KB)

振动与冲击 ›› 2021, Vol. 40 ›› Issue (3) : 178-186.

论文

柔性环形防护网顶破受力归一化分析

齐欣1,2,余志祥1,2，张丽君1,2，许浒1,2,李自名1

作者信息 +

Normalization analysis of puncture force of steel wire ring net

QI Xin1,2, YU Zhixiang1,2, ZHANG Lijun1,2, XU Hu1,2, LI Zhiming1

Author information +

文章历史 +

摘要

本文开展了6组环形钢丝网片单元顶破承载力试验，并基于LS-DYNA开展了非线性数值模拟，揭示了柔性环形网的顶破受力的三阶段工作特性。进一步考虑钢丝缠绕圈数、圆环直径、顶破端与环形网的面积比以及环形网长宽比等影响开展参数分析，据此提出了环形网片拉伸变形的解析计算方法，建立了顶破力—拉伸位移的相关性方程。研究结果表明：随着圆环缠绕圈数的增多，环形网的极限破断力线性增大，极限拉伸位移线性小幅减小；随着圆环直径的增加极限破断力指数型降低，极限拉伸位移线性增大；随着顶破端与网片的面积比的增大极限破断力和极限拉伸位移均幂函数持续减小，变化速率基本一致；随着环形网长宽比的增大，极限破断力和极限拉伸位移都呈幂函数减小，破断力的减小更为明显。研究成果可用于柔性防护系统环形网单元设计。

Abstract

Here, out-of-plane puncturing tests were conducted for six sets of steel wire ring net’s slice units, and nonlinear numerical simulations were also performed based on the software LS-DYNA. Tests and simulation revealed the 3-stage working characteristics of out-of-plane puncture force of steel wire ring net. Parametric analysis was further performed considering influences of number of steel wire winding, diameter of ring, area ratio between puncture end and annular mesh, and length width ratio of annular mesh. Then, the analytical calculation method for tensile deformation of annular mesh was proposed, and the correlation equation between puncture force and tensile displacement was established. The study results showed that with increase in number of steel wire winding, the ultimate puncture force increases linearly, and the ultimate tensile displacement decreases slightly and linearly; with increase in diameter of ring, the ultimate puncture force decreases exponentially, and the ultimate tensile displacement increases linearly; with increase in area ratio between puncture end and annular mesh, both the ultimate puncture force and the ultimate tensile displacement decrease continuously in form of power function, and the change rate is basically the same; with increase in length width ratio of annular mesh, both the ultimate puncture force and the ultimate tensile displacement decrease in form of power function, the decrease in the ultimate puncture force is more obvious; the results provide a reference for ring network unit design of flexible protection systems.

导出引用

齐欣1,2,余志祥1,2，张丽君1,2，许浒1,2,李自名1. 柔性环形防护网顶破受力归一化分析[J]. 振动与冲击, 2021, 40(3): 178-186

QI Xin1,2, YU Zhixiang1,2, ZHANG Lijun1,2, XU Hu1,2, LI Zhiming1. Normalization analysis of puncture force of steel wire ring net[J]. Journal of Vibration and Shock, 2021, 40(3): 178-186

参考文献

[1] Volkwein A, Schellenberg K, Labiouse V, et al. Rockfall characterisation and structural protection – a review [J]. Natural Hazards & Earth System Sciences, 2011, 11(9): 2617-2651.
[2]赵世春,余志祥,韦韬,齐欣.被动柔性防护网受力机理试验研究与数值计算[J].土木工程学报,2013,46(05):122-128.ZHAO S C, YU Z X, WEI T, QI X. Test study of force mechanism and numerical calculation of safety netting system[J]. China Civil Engineering Journal,2013,46(05):122-128.
[3] Qi X, Yu Z X, Zhao L, et al. A new numerical modeling approach for flexible rockfall protection barriers based on failure modes[J]. Advanced Steel Construction, 2018, 14(3):479-495.
[4] 齐欣,余志祥,许浒,孟庆成,赵雷,赵世春.被动柔性防护网结构的累计抗冲击性能研究[J].岩石力学与工程学报,2017,36(11):2788-2797.Qi X, Yu Z X, Xu H, et al .Cumulative impact resistance of passive flexible protective structure[J]. Chinese Journal of Rock Mechanics and Engineering, 2017,36(11):2788-2797
[5] Grassl H, Volkwein A, Anderheggen E, et al. Steel-net rockfall protection-experimental and numerical simulation[C]//Proceedings of the seventh international conference on structures under shock and impact, Montreal, Canada. 2002.
[6] Gentilini C, Govoni L, de Miranda S. et al. Three-dimensional numerical modelling offalling rock protection barriers[J]. Computers and Geotechnics, 2012, 44: 58-72.
[7]汪敏,石少卿,康建功.落石冲击作用下环形网耗能性能的理论及数值模拟研究[J].振动与冲击,2011,30(03):10-13+21.WANG M, SHI S Q, KANG J G. Numerical and theoretical analysis of dissipation energy capacity of ring net impacted by rockfall[J]. Journal of Vibration and Shock, ,2011,30(03):10-13+21.
[8] Escallón J P. Wendelcr C. Numerical simulations of quasi-static and rockfall impact tests of ultra-high nets using Abaqus/Explicit[C] Simulia Community Conference.2013.
[9] Castro-Fresno D , L. López Q, Bianco-Fernandez E , et al. Design and Evaluation of Two Laboratory Tests for the Nets of a Flexible Anchored Slope Stabilization System[J]. Geotechnical Testing Journal, 2009, 32(4):315-324.
[10] Yu Z, Qiao Y, Zhao L, et al. A simple analytical method for evaluation of flexible rockfall barrier Part 1: working mechanism and analytical solution [J]. Advanced Steel Construction, 2018, 14(2): 115-41.
[11] 赵雅娜,余志祥,赵世春.多跨布置式环网柔性被动网结构数值计算方法[J].振动与冲击,2019,38(17):211-219.Zhao Yana,Yu Zhixiang,Zhao Shichun.Numerical computing method for a flexible passive network structure with multi-span distributed ring-net[J]. Journal of Vibration and Shock,2019,38(17):211-219.
[12] Albrecht V B , Axel V . Numerical modelling of chain-link steel wire nets with discrete elements[J]. Canadian Geotechnical Journal, 2018,56(3): 398-419。
[13] Coulibaly J B , Chanut, Marie-Aurélie, Lambert, Stéphane, et al. Nonlinear Discrete Mechanical Model of Steel Rings[J]. Journal of Engineering Mechanics, 2017, 143(9):04017087.
[14] 石少卿,汪敏,孙建虎.主动防护系统力学性能的试验及数值分析[J].武汉理工大学学报,2013,35(10):106-109.SHI S Q, WANG M, SUN J H. Experimental and Numerical Study on Anchored Cable Nets[J]. Journal of Wuhan University of Technology,2013,35(10):106-109.
[15] Hu Xu, Cristina G, Zhixiang Yu ,et al. An energy allocation based design approach for flexible rockfall protection barriers[J]. Engineering Structures, 2018, 173:831-852.
[16]余同希. 对径受拉圆环的塑性大变形[J]. 力学学报, 1979, 15(1):95-98.
[17] Z.X.Yu，L.Zhao, L. P. Guo, Y. P. Liu, et al.. Full scale impact test and numerical simulation of a new-type resilient rock-shed flexible buffer[J].Shock and Vibration,2019, Article ID 7934696, 16 pages.
[18] 柳春,余志祥,郭立平,骆丽茹,赵世春.基于SPH-FEM耦合方法的落石冲击拱形钢筋混凝土棚洞数值模拟[J].振动与冲击,2019,38(13):118-125. LIU C, Yu Z X, GUO L P, et al. Numerical simulation for rock-fall impacting an arch RC hangar tunnel based on SPH-FEM coupled method[J]. Journal of Vibration and Shock, 2019,38(13):118-125.
[19] 赵世春,余志祥,赵雷,齐欣,韦韬.被动防护网系统强冲击作用下的传力破坏机制[J].工程力学,2016,33(10):24-34. Zhao Shichun,Yu Zhixiang,Zhao Lei,et al. Damage Mechanisim of Rockfall Barriers under Strong Impact Loading[J].Engineering Mechanics, 2016,33(10):24-34.
[20] 赵雅娜,余志祥,赵世春.柔性防护系统环形拦截网分区等代模型[J].西南交通大学学报,2019,54(04):808-815. ZHAO Y N, YU Z X, ZHAO S C. Ring-Net Subdivision Equivalent Model of Flexible Protection System[J]. Journal of Southwest Jiaotong University,2019,54(04):808-815.