复合材料层合扁球壳在集中冲击下的非线性动力屈曲

研究了复合材料层合扁球壳在中心集中冲击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球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的中心集中冲击载荷,采用Galerk in方法得到以顶点位移表达的冲击动力响应方程,并用Runge-Kutta方法进行数值求解,得到了不同载荷幅值下的位移响应曲线,应用Bud iansky-Roth准则(简称B-R准则)确定了冲击屈曲的临界荷载;讨论了壳体几何尺寸对复合材料层合扁球壳冲击屈曲的影响;数值算例表明,该方法是可行的.

Dynamic buckling of laminated composite shallow spherical shells under a concentrated impact

The nonlinear dynamic buckling for laminated composite shallow spherical shells under the action of a concentrated impact is investigated.By adding the transverse inertia term and introducing concentrated impact load to the basic equations of nonlinear buckling,the nonlinear dynamic governing equation for laminated shallow spherical shells subjected to concentrated impact is gained.The nonlinear dynamic responsive equation is obtained by Galerkin method.The displacement responsive curves are gained by Runge-Kutta method.The critical concentrated impact buckling load is determined by Budiansky-Roth motion criterion.The effects of geometric parameters on impact buckling are discussed.Numerical results show the feasibility of Galerkin Method.