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针对有限元程序在隐式分析方面不能解决大规模计算的弊端,提出用显式分析法对现有计算方法进行改进.研究表明,显式分析法能有效改善因计算规模带来的问题,并能更直观地反映结构的实际振动情况.在此基础上,计及螺旋桨脉动压力与轴承力的影响,针对某舰不同航行状态开展了螺旋桨激励力对舰船振动的影响研究,得到了不同航行状态下舰船的振动响应,分析结果表明:同一航速下,双桨同时工作较四桨同时工作的振动偏大,从减小振动角度出发,宜采用四桨同时推进的方式航行.
Aiming at the disadvantage that the finite element program can not solve the large-scale calculation in the implicit analysis, an explicit analysis method is proposed to improve the existing calculation method.The research shows that the explicit analysis method can effectively improve the problems caused by the calculation scale Can more directly reflect the structure of the actual vibration.On this basis, taking into account the propeller pulsating pressure and bearing force impact, carried out a propeller excitation force impact on the ship vibration for different navigational states of a ship, obtained the different voyage The results show that under the same speed, the work of twin sculls at the same time has more vibration than the four-propeller at the same time. From the view of reducing the vibration, the propulsion of four propellers should be adopted at the same time.