摘要
为了提高输电塔的可靠度,通过反应谱法研究了随机变量对可靠度的影响。利用汶川地震实测资料,基于K-S检验法和Spearman秩相关系数分别确定特征周期和地震影响系数最大值的概率分布和相关系数。基于响应面法拟合了输电塔的一次功能函数。利用功能函数得到可靠指标与相关系数的关系式。分析了随机变量对输电塔可靠度的影响。结果表明:特征周期和地震影响系数最大值分别服从正态分布和指数分布;特征周期和地震影响系数最大值的增加都会降低输电塔的可靠性,地震影响系数最大值是输电塔可靠性的敏感因素;考虑特征周期和地震影响系数最大值的负相关性会提高输电塔的可靠性。
The influence of random variables on the reliability is studied using the response spectrum method to improve the reliability of transmission towers. Based on Wenchuan seismic data, the probability distribution and correlation coefficient of the characteristic period and the maximum seismic influence coefficient are determined by the Kolmogorov-Smimov （ K - S） test and the Spearman rank correlation coefficient. A linear performance function of transmission towers is fitted based on the response surface method. The relation between the reliability index and the correlation coefficient is obtained by using the function. The influence of random variables on the reliability of transmission towers is analyzed. The results show that：the maximum earthquake influence coefficient and the characteristic period obey the normal distribution and the exponential distribution respectively; the increase of the maximum earthquake influence coefficient and the characteristic period reduces the reliability of transmission towers; the maximum earthquake influence coefficient is a sensitive factor to the reliability of transmission towers;the reliability of transmission towers can be improved by considering the negative correlation between the characteristic period and the maximum earthquake influence coefficient.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2016年第6期746-751,共6页
Journal of Nanjing University of Science and Technology
关键词
反应谱法
输电塔
响应面法
特征周期
地震影响系数最大值
response spectrum method
transmission towers
response surface method
characteristic period
maximum earthquake influence coefficient
