﻿ 交叉缠绕式柔性护栏端部锚固优化设计
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 山东大学学报(工学版)  2016, Vol. 46 Issue (3): 93-98  DOI: 10.6040/j.issn.1672-3961.0.2015.322 0

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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. DOI: 10.6040/j.issn.1672-3961.0.2015.322.

文章历史

Optimized design of cross-wound cable barrier end anchorage
LEI Zhengbao, LIAO Zhuo, LIU Zhuchun
Institute of Vehicle and Mechanical Engineering, Changsha University of Science and Technology,Changsha 410004, Hunan, China
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: cross-wound cable barrier    anchoring ends    finite element    orthogonal    collision analysis
0 引言

1 锚固系统初步尺寸设计

 图 1 护栏端部锚固系统 Figure 1 End anchorage system of barrier
2 锚固系统外载荷大小确定

2.1 钢丝绳可靠有限元模型的建立

 图 2 钢丝绳有限元模型 Figure 2 Finite element model of rope
2.2 钢丝绳模型验证

 图 3 大客车实车模型与有限元模型 Figure 3 Coach real vehicle model and finite element model
 图 4 客车-护栏模型 Figure 4 Coach-barrier model

 图 5 仿真试验与实车对比图 Figure 5 Simulation experiment and real vehicle contrast figure
2.3 锚固系统外载荷确定

 图 6 钢丝绳最大受力图 Figure 6 Biggest stress of wire rope
 图 7 锚固系统受载图 Figure 7 Anchorage system under load

3 正交试验 3.1 试验评价标准

3.2 因素和水平选取

 图 8 锚固系统因素分布图 Figure 8 The anchoring system factor distribution

 图 9 因素敏感度分析图 Figure 9 Factors sensitivity analysi

3.3 试验结果及分析

 $R=\max \left\{ {{{\bar{K}}}_{i}} \right\}-\min \left\{ {{{\bar{K}}}_{i}} \right\},$ (1)

 $\mu =\frac{1}{mn}\sum\limits_{i=1}^{m}{\sum\limits_{j=1}^{n}{{{x}_{ij}}}},$ (2)
 ${{S}_{T}}={{\sum\limits_{i=1}^{m}{\sum\limits_{j=1}^{n}{\left( {{x}_{ij}}-\mu \right)}}}^{2}},$ (3)
 $F=\frac{{{S}_{1}}/{{f}_{1}}}{{{S}_{2}}/{{f}_{2}}}$。 (4)

4 最优结果验证分析

 图 10 锚固系统仿真验证结果图 Figure 10 Simulation results of anchorage system

5 结论

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