论文标题
Nobeyama 45 m射电望远镜的主要反射器的风和操作引起的振动测量值
Wind- and Operation-Induced Vibration Measurements of the Main Reflector of the Nobeyama 45 m Radio Telescope
论文作者
论文摘要
由于射电望远镜的主要反射器的变形直接影响观测值，因此对变形的评估非常重要。 Nobeyama 45 m射电望远镜的主要反射器的动态特征是在两个条件下测量的：第一个是指向观测值在运行中，第二个是当反射器处于静止状态并在观察失效时会导致风载。使用压电加速度计测量主反射器的动态特性。当望远镜在运行中时，会诱导反射器上的一条节点线或垂直垂直线的振动模式，这取决于反射器是否在方位角还是高度平面上移动，而在大风条件下，振动模式同时诱发了两到四个节点线的振动模式。主要模式取决于风载的方向。
As deformations of the main reflector of a radio telescope directly affect the observations, the evaluation of the deformation is extremely important. Dynamic characteristics of the main reflector of the Nobeyama 45 m radio telescope, Japan, are measured under two conditions: The first is when the pointing observation is in operation, and the second is when the reflector is stationary and is subjected to wind loads when the observation is out of operation. Dynamic characteristics of the main reflector are measured using piezoelectric accelerometers. When the telescope is in operation, a vibration mode with one nodal line horizontally or vertically on the reflector is induced, depending on whether the reflector is moving in the azimuthal or elevational planes, whereas under windy conditions, vibration modes that have two to four nodal lines are simultaneously induced. The predominant mode is dependent on the direction of wind loads.
