摘要
基于虚功原理推导出三维接触面单元 ,并引进了预留单元 ,应用网格自动划分和单元生成技术 ,采用位移和应力交替控制的增量法 。
The stiffness matrix of a three dimensional contact surface element is deduced from the principle of virtual work. In order to reflect the variation of the contact surface, the incremental method is applied to control the loading procedure. The incremental loading factor guarantees continuity of displacement and stress between each pair of contact nodes. Special potential contact elements are introduced throughout the surface region where contact may occur, to avoid the need to rearrange the FEM mesh of nodes and elements as the contact surface varies during the loading procedure. The automatic grid and element generation methods are applied. The analysis of turbine contact problem between the blade root and rotor in the region in which a “push fit” connects the blade to its rotor is presented.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2000年第4期315-318,共4页
Journal of Mechanical Strength
关键词
弹性接触
接触面单元
预留单元
叶根强度
elastic contact
contact surface element
potential contact element
blade root strength
