Rapid Calculation Method Study and Realization for Wind Load of Ship-Borne Satellite Antenna

For antennas working in exposed environment, wind load is one of the main loads that must be taken into consideration. Wind load can not only directly impact on the structural strength of antenna, but also make actuating shaft of servo system bear wind torque disturbance which may indirectly affect the tracking accuracy of antenna servo system. This paper completed numerical computation on the wind loads of antenna at different wind speeds, angles of wind approach and angles of pitch based on method of computational fluid mechanics, hence the velocity fluid fields, pressure distribution on reflecting surface and moments of antenna under various posture situations were obtained and a sample database has been formed. According to the weather and ship navigation situation, rapid calculation of the wind load and moment born by antenna realized through ternary three-order curvilinear interpolation algorithm can effectively solve the problem of rapidly calculating the wind load of ship-borne satellite antenna. Moreover, with the sample database formed according to the images and moment data obtained from computation, the wind loads and moment parameters of antenna under all working conditions were obtained through ternary three-order interpolation algorithm, so as to realize the rapid calculation method for the wind loads of antenna under all working conditions.