【摘要】 研究了计及横向剪切的对称铺设正交异性复合材料层合扁锥壳在三角脉冲载荷作用下的非线性动力屈曲问题;通过在复合材料层合扁锥壳非线性稳定性的基本方程中增加横向转动惯量项并引入三角脉冲冲击力,得到了层合扁锥壳的冲击控制方程,采用Galerkin方法得到以顶点挠度表达的冲击响应方程,并用R unge-K u tta方法进行数值求解,应用B-R准则确定冲击屈曲的临界荷载;讨论了壳体几何参数、物理参数和边界条件对复合材料层合扁锥壳冲击屈曲的影响。更多还原

【Abstract】 Under the action of triangular pulse,the nonlinear impact buckling behavior of the shallow conical shells is investigated.The shallow conical shells are composed of symmetrically laminated,cylindrically orthotropic composite,for which transverse shear deformation is included.Botthe transverse inertia term and the triangular pulse load are added to the basic equations of nonlinear buckling for the laminated composite shallow conical shells,and then the nonlinear dynamic governing equation is gained.Via Galerkin method,the nonlinear dynamic responsive equation is obtained,and it’s solution is then obtained through Runge-Kutta method.Budiansky-Roth motion criterion that is expressed by peak displacement is employed to determine the critical impact buckling load.The effects of geometric parameters,physical parameters and boundary conditions on impact buckling of laminated composite shallow conical shells is discussed.更多还原