A crossing rate method to reliability analysis of antenna structure under fluctuating wind

In order to investigate the complete problem of antenna design under wind load in a statistical way, a time-variant reliability procedure is proposed in this paper, which differs from conventional reliability approaches for antenna design. It considers the influence of the Gaussian behavior of wind-induced pressures of antenna in its lifetime on the reliability index of antenna. It is shown that the reliability of under wind load significantly reduces when time is considered. A time-independent reliability approach which does not consider degradation of may greatly over estimate the reliability index for antenna under fluctuating wind load. The design recommendations are also given in this paper. The procedures proposed in this paper represent a suitable way to evaluate the safety of antenna under wind load.