交叉缠绕式柔性护栏端部锚固优化设计

doi:10.6040/j.issn.1672-3961.0.2015.322

摘要/Abstract

摘要： 为研究符合我国公路环境条件的交叉缠绕式柔性护栏端部锚固系统,结合我国公路环境并参考国外护栏端部锚固的设计,对锚固系统各部分外形及尺寸进行初步设计。运用ls-dyna软件建立锚固系统有限元碰撞分析模型,并结合实车试验方法与有限元仿真试验方法,得到锚固系统的外载荷及可靠的钢丝绳有限元模型。利用正交试验方法,对初始的锚固系统尺寸进行优化设计,通过极差和方差分析得到锚固系统的最优尺寸组合,对最优结果进行验证分析。结果表明,该锚固系统在受载情况下无任何拔出与倾斜,其土壤最大应力为8.2×10^-3MPa,远小于其许用应力1.7×10^-1MPa,能很好地满足各项评价指标。

关键词: 碰撞分析, 正交试验, 端部锚固系统, 交叉缠绕式柔性护栏, 有限元

Abstract: In order to research the cross type flexible barrier end anchorage system which conformed to Chinese highway environmental conditions, each part of anchorage system's shape and size was designed according to Chinese actual road environment and referred to foreign guardrail end anchor. Anchorage system model was established using ls-dyna finite element software, the external load of anchorage system and reliable finite element model of wire rope was got combined with real vehicle test and finite element simulation. The initial size of anchorage system was optimized using orthogonal test method. Optimal size was got thorough range and variance analysis. And it was validated through simulation test. The result showed that anchorage system was not pulled out and tilted under external load. The maximum stress of soil was 8.2×10^-3MPa, far less than the allowable stress which was 1.7×10^-1MPa. Thus, this anchorage system could meet the evaluation index well according to above mentioned.

Key words: collision analysis, orthogonal, cross-wound cable barrier, finite element, anchoring ends

中图分类号:

U491.5+9

雷正保,廖卓,刘助春. 交叉缠绕式柔性护栏端部锚固优化设计[J]. 山东大学学报(工学版), 2016, 46(3): 93-98.

LEI Zhengbao, LIAO Zhuo, LIU Zhuchun. Optimized design of cross-wound cable barrier end anchorage[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2016, 46(3): 93-98.

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