节点文献
空间框架结构弹性动力学非传统Hamilton型变分原理
THE UNCONVENTIONAL HAMILTON-TYPE VARIATIONAL PRINCIPLES FOR ELASTODYNAMICS OF SPACE FRAME STRUCTURES
【摘要】 根据古典阴阳互补和现代对偶互补的基本思想,通过罗恩提出的一条简单而统一的新途径,系统地建立了空间框架结构弹性动力学的各类非传统Hamilton型变分原理.文中首先给出空间框架结构弹性动力学的广义虚功原理的表式,然后从该式出发,不仅能得到空间框架结构弹性动力学的虚功原理,而且通过所给出的广义Legendre变换,还能系统地成对导出空间框架结构弹性动力学的5类变量、3类变量、2类变量变分原理的互补泛函,以及1类变量和相空间非传统Hamilton型变分原理的泛函.同时,通过这条新途径还能清楚地阐明这些原理的内在联系.
【Abstract】 According to the basic idea of classical yin-yang complementarity and modern dual-complementarity,in a simple and unified new way proposed by Luo,the unconventional Hamilton-type variational principles for elasto-dynamics of space frame structures were established systematically. The unconventional Hamilton-type variational principle can fully characterize the initial-boundary-value problem of space frame structures’ elasto-dynamics. In this paper,an important integral relation was given,which can be considered as the expression of the generalized principle of virtual work for elasto-dynamics of space frame structures. Based on this relation,it is possible not only to obtain the principle of virtual work for elasto-dynamics of space frame structures,but also to derive systematically the complementary functionals for five-field,three-field and two-field unconventional Hamilton-type variational principles,and the functional for one-field and the unconventional Hamilton-type variational principle in phase space by the generalized Legendre transformations given in this paper. Furthermore,with this new approach,the intrinsic relationship among various principles can be explained clearly.
【Key words】 space frame structures; elasto-dynamics; phase space; unconventional Hamilton-type variational principle; initial-boundary-value problem;
- 【文献出处】 动力学与控制学报 ,Journal of Dynamics and Control , 编辑部邮箱 ,2008年03期
- 【分类号】TU399
- 【被引频次】6
- 【下载频次】115