论文部分内容阅读
国家自然科学基金重大项目“大型旋转机械非线性动力学问题”(19990510)自1999年3月立项至今已工作了2年。两年来,项目组在国家自然科学基金委员会和11个单位的支持下,顺利完成项目任务书规定的各项研究任务。主要成果有: (1)建立了300MW汽轮发电机组有关轴承的非线性油膜力数据库,并在此基础上建立了非线性油膜力近似表达式,研制和改造两台能研究油膜非线性行为的试验台,在寻找椭园轴承油膜力解析公式上取得重要进展; (2)首次研究了余维5分岔及约束分岔问题,在内共振条件下的系统降维及模态分岔方面取得了进展:
National Natural Science Foundation of China major project “large rotating machinery nonlinear dynamics” (19990510) since March 1999 project has been working for 2 years. In the past two years, with the support of NSFC and 11 units, the project team successfully completed all the research tasks stipulated in the project mission statement. The main achievements are as follows: (1) A nonlinear oil film force database about 300MW turbo-generator bearing was established. On the basis of this, a nonlinear oil film force approximate expression was established and two sets of oil film non-linear behaviors (2) For the first time, the problem of bifurcation and restrained bifurcation of the residual 5-bifurcation has been studied for the first time, and the system dimensionality reduction and modal bifurcation under internal resonance have been achieved Progress: