摘要
结合舞动自身特性,研究了输电导线舞动的单自由度模型,给出了建立单自由度模型的一般方法,采用精确的相对风速表达式研究了舞动的单自由度模型,推导了起舞的临界风速解析表达式,分析了影响舞动临界风速的因素.结果表明:影响临界风速的因素有单位长度上覆冰导线的质量、阻尼、初始攻角、气动力系数、空气的密度以及覆冰导线的有效受风长度,其中空气密度是常量,为预防和抑制导线舞动提供参考.
Combined with galloping characteristics, a single degree of freedom model for transmission line galloping is studied; and then a general method to establish a single degree of freedom model is given; by using precise relative wind speed single degree of freedom model to study the expression of galloping, a critical wind speed analytical expressions is deduced. The factors of galloping critical wind speed is.analyzed. The results show that：factors affecting the critical wind speed are mass per unit length of iced conductors, damping, initial angle of attack, aerodynamic coefficients, the air density and iced conductors, where the air density is constant. The results provied reference for prevention and suppressing galloping.
出处
《三峡大学学报（自然科学版）》
CAS
2015年第6期70-74,共5页
Journal of China Three Gorges University：Natural Sciences
关键词
输电线
舞动
临界风速
阻尼
初始攻角
气动力系数
transmission line
galloping
critical wind speed
damping
initial attack angles aerodynamic coefficients
