青海省尖扎中波台自立发射塔健康监测研究

Health monitoring study of self-supporting radio tower of medium-wave station of Jainca County in Qinghai Province

以青海省尖扎中波台自立发射塔为对象,通过布置结构健康监测系统,研究塔关键部位的应力状态和结构动力特性,监测系统主要包括风速风向、应力、加速度等监测项,基于监测结果分析了塔底部支座锚固区和塔身应力状态,采用频谱分析法识别了结构的动力参数。结果表明自立发射塔底部支座锚固区和塔身应力变化值均较小,实测结构频率与按规范中的经验公式计算结果较吻合。

The stress state and structural dynamic characteristics of the key parts of the tower were studied by arranging the structural health monitoring system in self-supporting radio tower of medium-wave station of Jainca County in Qinghai Province. The monitoring system mainly included the monitoring items of wind speed, wind direction, stress and acceleration. Based on the monitoring results,the stress state of the anchorage zone in bottom of the tower and the tower body were analyzed. The dynamic parameters of the structure were identified by spectrum analysis method. The results show that the changes of stress values in anchorage zone in bottom of the tower and tower body of the self-supporting radio tower are relatively small,and the measured frequency is in good agreement with the empirical formula according to the specification.