Galloping phenomenon is one of the vibrations caused by icing. If galloping phenomenon continues, short-circuit or ground fault may occur, so analysis of galloping phenomenon through research on transmission line stability is necessary. The DenHartog method, which is frequently used for the galloping stability determination of the transmission line, considers only the vertical movement of the transmission line. In this study, we analyze the motion of multi-degree-of-freedom objects, using a computer aided engineering program. We modeled transmission lines as a multi mass-spring-damper systems using RecurDyn, which is a multibody commercial dynamics analysis program to analyze the galloping phenomenon dynamically. Damping inside transmission line derived from the Rayleigh damping theory through the free vibration experiment of transmission line. ANSYS Fluent, a flow analysis program, was used to derive the aerodynamic coefficients for transmission line with asymmetric cross-section. Using the derived aerodynamic coefficient, we confirmed the galloping occurrence condition of DenHartog method and modeled the wind load acting on the transmission line to conduct galloping simulation. Through the analysis of the motion of a multi-degree-of-freedom transmission line, the occurrence of galloping was classified into ovoid and vertical trajectories, and the case of no galloping was defined as regular trajectory, and the range of angle of attack that causes the instability of transmission lines was defined.

舞动现象是结冰引起的振动之一。如果继续出现舞动现象，则可能发生短路或接地故障，因此有必要通过研究传输线的稳定性来分析舞动现象。DenHartog方法（通常用于确定传输线的疾驰稳定性）仅考虑传输线的垂直运动。在这项研究中，我们使用计算机辅助工程程序来分析多自由度对象的运动。我们使用RecurDyn将传输线建模为多质量弹簧阻尼器系统，这是一个多体商业动态分析程序，可以动态分析驰gall现象。通过传输线的自由振动实验，根据瑞利阻尼理论推导了传输线内部的阻尼。ANSYS Fluent是一种流量分析程序，用于得出横截面不对称的传输线的空气动力学系数。使用导出的空气动力学系数，我们确定了DenHartog方法的驰occurrence发生条件，并对作用在传输线上的风荷载进行了建模，以进行驰simulation模拟。通过多自由度传输线的运动分析，将舞动的发生分为卵形轨迹和垂直轨迹，将没有舞动的情况定义为规则轨迹，并将攻角范围定义为导致传输线不稳定的原因已定义。我们确定了DenHartog方法的驰occurrence发生条件，并对作用在传输线上的风荷载进行了建模，以进行驰simulation模拟。通过多自由度传输线的运动分析，将舞动的发生分为卵形轨迹和垂直轨迹，将没有舞动的情况定义为规则轨迹，并将攻角范围定义为导致传输线不稳定的原因已定义。我们确定了DenHartog方法的驰occurrence发生条件，并对作用在传输线上的风荷载进行建模，以进行驰gall模拟。通过多自由度传输线的运动分析，将舞动的发生分为卵形轨迹和垂直轨迹，将没有舞动的情况定义为规则轨迹，并将攻角范围定义为导致传输线不稳定的原因已定义。