全垫升气垫船耐波性参数敏感度分析

Analysis of Air Cushion Vehicle's Seaworthiness and Sensitive Parameters

考虑气垫压力、升沉、纵摇和横摇运动相互耦合作用,将气垫船耐波性分析理论从二维拓展为三维,采用通用平台Matlab实现计算流程.在此分析模型中,对气垫船载重、不同配载形式和前后气垫分割围裙位置进行计算,分析耐波性响应计算结果,得到气垫船重心位置、初始纵横倾角和前后气垫分割围裙位置等4个参数为气垫船耐波性响应敏感参数.计算结果显示,由于风扇压力和流量非线性响应,气垫船载重变化和不同初始装载状态的变化导致气垫船耐波性响应突变,可能引发事故,建议对不同典型工况在设计中加以校核,在营运中严格按设计标准执行.

This paper generalizes the traditional 2D seaworthiness analysis theory of air cushion vehicle （ACV） to 3D. The coupling of the changing air cushion pressure, heave response, pitch response and roll response was considered. A program was designed for calculating the unit frequency response of the ACV seaworthiness characteristics on Matlah. Using this program, the ACV seaworthiness with different weight, loading conditions and locations of fore-and-aft separate skirt was calculated. Then the location of the ACV gravity, initial trim angle, initial heeling angle and the location of fore and after separate skirt are the sensitive parameters of ACV seaworthiness. These parameters should be considered in the design to optimize the ACV integral performance. Meantime, considering the nonlinear responses of fan pressure and flow changing, the variation of ACV total weight and initial float condition maybe cause the rough changing of seaworthiness character, which would lead to an accident in ACV operation, so, typical loading condition and reasonable weight variation of ACV should be checked with fan determination to avoid design defect. And in operation, the design standard should be exactly executed to assure the safety.