基于随机振动及系统识别理论，对两相邻直线输电塔和两相邻转角输电塔进行双向同步环境脉动测试，并对实测结果进行了分析与对比。实测结果表明，直线杆塔的前三阶振动分别为沿导线方向和垂直导线方向的平动及扭转振动。与转角塔相连的输电塔与两相邻直线杆塔的杆件型号、材料完全相同，而该塔动力特性与直线杆塔相比，其频率增加，阻尼比减小了。阻尼和刚度的变化在一定程度上影响着输电塔-线体系的风振系数，最终引起输电塔-线体系的风振反应发生变化。而转角输电塔位于两个方向的转角处，其位置特殊，加上其结构本身的不对称性，分析得到该转角输电塔的前几阶振动形式为扭转振动和纵横向的耦合振动。

Based on the theory of random vibration and system identification, the ambient vibration testing of two Adjacent transmission towers were carried out. The dynamic characteristic of the towers were analyzed and compared. The experimental results show that the first three orders of natural frequency of two adjacent transmission towers are transverse vibration, longitudinal vibration and torsional vibration. The transmission tower adjacent to the angle tower has the same member type and material to the two adjacent tangent transmission towers, but the vibration characteristics of it are influenced by the behavior of the conductors. So wind vibration coefficient of the transmission towers changed, too. The transmission tower around the corner has special location and asymmetric structure, its vibration are torsional vibration and coupled vibration.