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衡阳市新一代天气雷达塔楼总高度为131.6m,顶部安装CINRAD新一代多普勒天气雷达系统。由于结构自身特性无法满足雷达生产厂家提出的结构自振频率大于1Hz的要求,通过对上海气象雷达塔的实测,得到CINRAD新一代多普勒天气雷达系统的转动频率,与计算得到的衡阳市新一代天气雷达塔楼结构第1阶自振频率之比为0.735,远在共振区范围之外;根据结构动力学相关公式及测试结果,推导出雷达天线运行时塔顶的加速度响应幅值为7.3cm/s~2。因此,CINRAD新一代多普勒天气雷达系统可以用于衡阳市新一代天气雷达塔楼,不会发生共振,且加速度响应较小。
Hengyang City, a new generation of weather radar tower total height of 131.6m, the top of the CINRAD install a new generation of Doppler weather radar system. Because the structure’s own characteristics can not meet the requirement of the natural frequency of the structure proposed by the radar manufacturer that the natural frequency is greater than 1 Hz, the rotational frequency of the CINRAD next-generation Doppler weather radar system is obtained through the measurement of the Shanghai meteorological radar tower. The first natural frequency ratio of the first-generation weather radar tower structure is 0.735, which is far from the resonance range. According to the formula of structural dynamics and the test results, it is deduced that the acceleration response amplitude of the tower top when the radar antenna is operating is 7.3 cm / s ~ 2. Therefore, CINRAD next-generation Doppler weather radar system can be used for a new generation of weather radar tower in Hengyang, will not resonate, and the acceleration response is small.