The invention relates to a method for calculating a vertical shearing force and a vertical bending moment when a ship approaches waves. The method comprises the following steps of: subdividing a rigid ship body into a plurality of sections along the length direction of the ship; a balance force system is formed by the vertical shearing force of the segmented section and the gravity, inertia force and hydrodynamic force which act on the gravity center of the ship body at the front part of the segmented section, and a balance force system is formed by the vertical bending moment of the segmented section and the gravity moment, inertia force moment and hydrodynamic force moment which act on the gravity center of the ship body at the front part of the segmented section; carrying out stress analysis on the segments; the six-degree-of-freedom motion amplitude at the gravity center of the rigid ship body, hydrodynamic force and force and torque at the gravity center of each section are obtained through a specified hydrodynamic force calculation method, vertical shearing force and vertical bending moment at each section position are deduced according to the Alembert principle, and finally the vertical shearing force and the vertical bending moment of the whole ship are obtained. The fluid viscosity problem when the ship body wave load is solved is considered, the problem of solving the rigid ship body wave load is solved, and a new forecasting method is provided for ship wave load design.
本发明涉及一种船舶迎浪下垂向剪力和垂向弯矩的计算方法,将刚性船体沿着船长方向细分为多个分段;将分段剖面的垂向剪力与作用在此分段剖面前部分的船体重心处的重力、惯性力和水动力组成的平衡力系,将分段剖面的垂向弯矩与作用在此分段剖面前部分的船体重心处的重力力矩、惯性力力矩和水动力力矩组成的平衡力系,对分段进行受力分析;通过指定水动力计算方法,获得刚性船体重心处六自由度运动幅值、水动力以及各分段重心处的力和力矩,根据达朗贝尔原理推导得出各剖面位置处的垂向剪力和垂向弯矩,最终得到整船的垂向剪力和垂向弯矩。既考虑求解船体波浪载荷时流体黏性问题,又实现了刚性船体波浪载荷的求解问题,给船舶的波浪载荷设计提供新的预报方法。
Method for calculating vertical shearing force and vertical bending moment when ship approaches waves
船舶迎浪下垂向剪力和垂向弯矩的计算方法
2024-01-09
Patent
Elektronische Ressource
Chinesisch
IPC: | B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS |
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