JUMPING INSTABILITIES IN THE POST-BUCKLING OF A BEAM ON A PARTIAL NONLINEAR FOUNDATION  

作　　者：Yin Zhang Kevin D Murphy 

机构地区：[1]State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences [2]Department of Mechanical Engineering, University of Connecticut

出　　处：《Acta Mechanica Solida Sinica》2013年第5期500-513,共14页固体力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11021262 and 11023001);Chinese Academy of Sciences(No.KJCX2-EW-L03)

摘　　要：Mode jumping is an instability phenomenon in the post-buckling region, which causes a sudden change in the equilibrium configuration and is thus harmful to structure. The con- figuration of a partial elastic foundation can directly induce mode coupling from the buckling stage and through the whole post-buckling region. The mode coupling effect due to the configuration of partial foundation on mode jumping is investigated and demonstrated to be an important factor of determining mode jumping. By properly choosing the partial elastic foundation configuration, mode jumping can be avoided.Mode jumping is an instability phenomenon in the post-buckling region, which causes a sudden change in the equilibrium configuration and is thus harmful to structure. The con- figuration of a partial elastic foundation can directly induce mode coupling from the buckling stage and through the whole post-buckling region. The mode coupling effect due to the configuration of partial foundation on mode jumping is investigated and demonstrated to be an important factor of determining mode jumping. By properly choosing the partial elastic foundation configuration, mode jumping can be avoided.

关 键 词：instability mode jumping tertiary jumping buckling beam elastic foundation 

分 类 号：TU470[建筑科学—结构工程]