一种气垫船结构疲劳分析的简化方法

A simplified method for structural fatigue analysis of hovercraft

[目的]气垫船的运行原理不同于常规船型的船舶,其受力特殊,速度较后者高出很多,目前世界主要船级社所提出的疲劳强度简化计算方法并不完全适用于气垫船,需要提出一种适用于气垫船疲劳强度校核的简化计算方法。[方法]针对气垫船结构的疲劳强度问题,根据气垫船特殊的结构及航行模式等,结合主流规范、试验及相关研究,从工况确定、载荷计算、累计损伤推导等方面进行分析,提出一种适用于气垫船结构疲劳分析的简化方法,并以某气垫船为例进行算例分析。[结果]简化计算结果显示典型纵骨节点的疲劳寿命均符合疲劳强度要求,算例分析结果表明该方法具有一定的适用性。[结论]所提简化方法对气垫船的研发设计及校核具有参考意义。

[Objectives]The operation principle of a hovercraft is different from those of conventional ship,with special stresses and much higher speeds than conventional ships.At present,the simplified fatigue strength calculation method proposed by major classification societies is not fully applicable to hovercraft,so it is necessary to put forward a suitable simplified method.[Methods]According to the special structure and sailing mode of hovercraft,and combined with mainstream specifications,experiments and related research,this paper analyzes the working conditions,load calculations,cumulative damage derivation and other aspects,and puts forward a simplified method suitable for the fatigue analysis of hovercraft structures using a specific hovercraft as an example for calculation.[Results]The simplified calculation results show that the fatigue life of typical longitudinal nodes meets the requirements of fatigue strength,and the analysis results of the example show that this method has certain applicability.[Conclusions]The simplified method proposed in this paper can be used as a reference for the development,design and verification of hovercraft.