散货船剪力修正研究和数值模拟

Study and Numerical Simulation on Shear Force Corrections of Bulk Carriers

从剪力修正原理出发,分析剪力修正对横剖面剪力Q的影响,证明修正后的剪力绝对值可能较修正前减小,也可能增加。通过与单跨梁和双跨梁类比,分别论述单个货舱和两相邻货舱剪力修正量的分布规律,解释修正后剪力曲线在横舱壁位置处的不连续性。通过有限元数值计算技术模拟一艘7货舱散货船在隔舱装载和重压载两种典型装载工况下的剪力曲线,验证分析的正确性。

Through the study on the theory of shear force corrections, the influence on shear force Q was analyzed and it was verified that the absolute values of corrected shear forces may be decreased or increased in contrast with those before correction. With the comparison with single span beam and double span beam, the distribution of shear force corrections within one cargo hold and two adjacent cargo holds was formulated respectively and the discontinuity of corrected shear force curve at transverse bulkheads wa explained. The shear force curves of a seven-cargo hold bulk carrier on alternate hold loading condition and heavy ballast condition were simulated by FEM and the validity of theoretical study was verified.