动态有限元法在船体板架振动计算中的应用  

Application of dynamic finite element method to computation of vibration of hull grillage

作　　者：李俊[1] 金咸定[1] 

机构地区：[1]上海交通大学

出　　处：《船舶工程》2001年第2期15-17,2,共3页Ship Engineering

摘　　要：该文通过直接求解轴向受载的均匀Timoshenko梁单元扭转振动和弯曲振动的运动微分方程 ,导出了考虑轴向力、剪切变形和转动惯量的平面板架的动态刚度矩阵的解析表达式 ,并用改进的二分法求解频率特征方程。经对处于复杂弯曲状态的船体板架振动的数值计算 ,验证了本方法的精确性和有效性。By means of directly solving motion differential equations of torsion vibration and flexural vibration of axially loaded uniform timoshenko,analytical expressions of dynamic stiffness coefficients accounting for axial force,shear deflection and rotary inertia are derived in the paper.The frequency characteristic equation is solved by the improved bisection method.Finally the theory is applied to compute vibration of hull grillage that is in complicated conditions.A unmerical example demonstrates that the presented method is accurate and effective.

关 键 词：动态有限元法 船体板架 板架振动 船舶 计算方法 

分 类 号：U661.44[交通运输工程—船舶及航道工程]