复合材料层合开顶扁球壳在集中冲击下的非线性动力屈曲  

DYNAMIC BUCKLING OF LAMINATED COMPOSITE,TRUNCATED,SHALLOW SPHERICAL SHELLS UNDER A CONCENTRATED IMPACT

作　　者：徐加初[1] 杨增涛[1] 

机构地区：[1]暨南大学力学与土木工程系,广州510632

出　　处：《振动与冲击》2007年第1期1-3,7,共4页Journal of Vibration and Shock

摘　　要：研究了具有刚性中心的复合材料层合开顶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。通过增加横向转动惯量项得到中心集中冲击下复合材料层合开顶扁球壳非线性稳定性的控制方程,采用Galerk in方法得到以刚性中心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,应用Bud iansky-Roth准则(简称B-R准则)确定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开顶扁球壳冲击屈曲的影响。Nonlinear dynamic buckling for laminated composite,truncated,shallow spherical shells under a concentrated impact is investigated.Adding transverse inertia term and introducing concentrated impact load to their basic equations,the nonlinear dynamic governing equations for laminated shallow spherical shells subjected to a concentrated impact are gained.The corresponding nonlinear dynamic response equations are obtained by Galerkin method and solved by Runge-Kutta method.Budiansky-Roth criterion expressed by displacements of rigid center is employed to detemine the critical concentrated impact bucking load.The effects of geometric parameters on impact buckling of laminated,truncated,shallow spherical shells are discussed.

关 键 词：复合材料层合开顶扁球壳 动力屈曲 矩形脉冲 Budiansky—Roth准则 GALERKIN方法 

分 类 号：O322[理学—一般力学与力学基础] O343.9[理学—力学]