摘要
根据断裂力学理论和转子动力学理论,考虑沿3个坐标轴方向6个载荷的作用,推导出了含裂纹的转轴刚度。裂纹的开闭状态由裂纹面的应力决定。通过数值仿真计算发现:刚度在3个坐标轴方向上随着裂纹深度的变化幅度有很大差异,轴向刚度变化以及小裂纹情况下垂直于裂纹方向的刚度变化可以不考虑;随着细长比的增大,裂纹轴的刚度减小。
By considering six loads along three axes, the stiffness matrix of a cracked rotor is deduced by the fracture mechanics principle and rotordynarnics theories. The opening or closing of the crack depends on the stress acting on the cross section where the crack is located. It is concluded through numerical simulation that the alterative extent of stiffness is obviously different along three axes and the changes in the perpendicular direction and axis can be ignored. The stiffness of the cracked rotor decreases with the augmentation of the slenderness ratio.
出处
《机械科学与技术》
CSCD
北大核心
2008年第10期1195-1198,共4页
Mechanical Science and Technology for Aerospace Engineering
关键词
转子
裂纹
刚度
断裂力学
应变能
rotor
crack
stiffness
fracture mechanics
strain energy
