拉线初张力对特高压双柱悬索拉线塔受力性能影响的风洞试验研究  

Wind tunnel tests for effect of guy pretension on mechanical properties of UHV cross-rope suspension tower-line

作　　者：俞登科[1] 李正良[1] 施菁华[2] 晏致涛[1] 肖正直[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]华北电力设计院工程有限公司,北京100120

出　　处：《振动与冲击》2015年第13期163-168,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51308568)

摘　　要：为研究拉线初张力对±800 k V特高压双柱悬索拉线塔抗风性能产生的影响,分别取拉线初张力为其设计承载力的15%、20%、25%,进行了塔线体系气动弹性模型的风洞试验。试验结果表明:拉线初张力的改变对荷载状态下塔线体系的受力性能影响显著,且对双柱支座反力和拉线拉力的影响呈非线性关系,应对拉线初张力进行优化选取。The effect of guy initial tension on wind-resistant performance of a ±800kV direct current （DC）cross-rope suspension tower-line was investigated through an aero-elastic model test in a boundary layer wind tunnel.Three kinds of guy initial tensions （15%,20%,and 25% of the ultimate stress）were selected.The results showed that the changes of guy initial tension have a significant influence on mechanical properties of a tower-line system under wind load condition;there is a nonlinear-relationship between influence on tension in guys and influence on compression in masts, thus the guy initial tension should be selected optimally.

关 键 词：拉线初张力 双柱悬索拉线塔 气动弹性模型 风洞试验 风振响应 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM726.1