复合材料杆塔人工加速老化试验及其长期性能评估  

Artificial Accelerated Ageing Test for Composite Material Tower and Its Long-Term Performance Evaluation

作　　者：方雅琪 王力农[1] 李姗姗[1] 郭真萍 

机构地区：[1]武汉大学电气工程学院,武汉430072 [2]国网湖北省电力公司荆州供电公司,荆州434007

出　　处：《电工技术学报》2017年第19期212-219,共8页Transactions of China Electrotechnical Society

摘　　要：复合材料杆塔在实际运行中受到高湿、高低温、紫外线、雨水和电场等多种因素的侵蚀老化,同时导线在风力作用下的振动也会造成杆塔应力疲劳老化。为全面评估复合材料杆塔的运行可靠性和耐老化特性,结合我国杆塔实际运行环境,在IEC 5 000 h多因子老化试验方法的基础上进行改进,首次对复合材料杆塔开展人工加速老化试验,并通过在杆塔表面植入光纤光栅传感器实时监测杆塔应变。试验前,通过有限元力学仿真确定光纤光栅传感器在杆塔上的植入部位;试验中通过加装振动装置模拟风力对杆塔的影响。对杆塔应变数据进行分析,结果显示:紫外和高热高湿环境对杆塔应变有较大影响;经过5 000 h人工加速老化试验后,杆塔应变变化幅度小,杆塔未出现明显缺陷,表明复合材料杆塔可在户外长期运行。The ageing process of composite material tower is affected by multi-stress such as high humidity,high-low temperature,UV,rain and strong field in practical operation,and the process is exacerbated due to stress fatigue caused by conductor vibration in strong wind. Thus combined with tower actual running environment in China,a new circulation program for artificial accelerated ageing test was proposed according to IEC 5 000 h multi-stress test procedure. And the reliability and anti-aging capacities of composite material tower were evaluated by monitoring the strain of it via fiber grating sensors implanted in the tower. Before the test, the stress distribution of the tower sample was calculated with finite element method to determine implantation places of fiber grating sensors. In the test,the effect of wind was simulated by a vibration device. The test results show that the tower strain is affected by UV and hydrothermal ageing; the surface of composite material tower remains intact after 5 000 h multi-stress artificial accelerated ageing test,and the strain of tower changes slightly with time,which proves long-term reliability of composite material tower.

关 键 词：复合材料杆塔 多因子老化试验 光纤光栅传感器 应变 

分 类 号：TM215[一般工业技术—材料科学与工程]