在符拉索夫开口薄壁杆件理论平面假定的基础上 ,对核筒采用三次B样条有限条方法构造连续化模型 ,并分别计算其动、势能 .针对悬挂部分 ,分别应用连续梁的三弯矩方程和悬吊体系理论 ,计算其动、势能 .然后 ,由拉格朗日公式 ,得到悬挂结构体系的动力方程 ,并用Wilsonθ法求解 .最后 ,结合算例得到了具有实际意义的结论 . On the basis of the theoretical plane assumption of the thin-walled rod in the opening of Flatsov, the continuous model was constructed by cubic B-spline finite strip method and the dynamic and potential energies were calculated respectively. For the suspension part, Three moment equations and the theory of suspension system to calculate their kinetic and potential energys.And then, by Lagrange formula, the dynamic equations of the suspension system are obtained and solved by Wilson θ method.Finally, the conclusion with practical significance is obtained by combining the examples .