长横对江渡新能源车客渡船总纵强度计算分析

Longitudinal Strength Analysis of the Changxing-Hengsha Island Ultra-capacitor Ro-ro Ferry

长横对江渡为全电动、零排放新能源车客渡船,主甲板下设有推进器舱、机舱和超级电容舱,主甲板上布置车辆舱、旅客舱和驾驶室,用于旅客、中小型汽车和载重卡车跨江运输。主甲板和船底都采用纵骨架式,且船长不大于80 m,按照CCS内河规范规定可以免于总纵强度计算,但是考虑到该船宽深比(B/D)偏大,船首底部线型急剧收窄不同于常规渡船线型,以及电容舱不能设置满足规范要求的双向桁架等原因,在设计过程中不仅按照规范校核总纵弯曲和屈曲强度,还通过中部主船体舱段包括上层建筑有限元计算,进一步评估校核该区域主要构件屈曲强度,使结构设计更加合理安全。

Driven by electricity with zero emission,the Changxing-Hengsha Island ultra-capacitor ro-ro ferry is built for carrying passengers,cars and trucks transportation.There is thruster room,engine room and super-capacitor room under main deck,while vehicle room,passenger room and wheel house are above main deck.Longitudinal framing is adopted for main deck and bottom shell,and the rule length is less than 80 m,therefore longitudinal strength analysis is not necessary according to the rules.But because of bigger breadth depth ratio(B/D)than normal vessel,sharp and narrow fore bottom lines and the truss arrangement in capacitor room not satisfying rules,longitudinal bending strength and buckling strength are still checked according to the rules.Mid-body FEM calculation with superstructure is also implemented to assess primary member buckling strength,making the structure more reasonable and safe.