摘要
风洞动力轴系的运行品质对风洞的效率和性能有决定性的影响,随着轴系在役运行时间的增加,转动部分多数会有质量偏心现象出现,这使得轴系的扭转振动与弯曲振动的耦合作用明显增强。以某风洞动力轴系为研究对象,在已有耦合振动方程基础上,采用有限差分、New mark积分法求得动力响应,并将其模化为多支承分布质量模型,分析它在简谐衰减、非同期并列两种典型工况激励下的弯振特性。分析结果为研究某风洞动力轴系耦合振动中弯振特性的定量、定性分析提供了依据。
The running quality of the wind tunnel power shaft system has a decisive influence on the efficiency and performance. With increase of the runtime of the shafting,rotor parts have inevitable mass eccentricity,which obviously strengthens the coupling function of torsional and bending vibration. In this paper,the subject investigated is power shaft system of one wind tunnel,on the basis of the established coupling formula,dynamic response of the shaft system is investigated by the difference method and new mark integral method,and then the subject which is simulated multi-supporting distributed mass model is analyzed in the two typical operating conditions of the harmonic attenuation urge and the asynchronous juxtaposition urge. The results can be reference to the qualitative analysis and quantitative study to the bending character of a complex power shaft system coupling vibration for one wind tunnel.
出处
《机械传动》
CSCD
北大核心
2009年第5期17-19,47,共4页
Journal of Mechanical Transmission
关键词
风洞
动力轴系
模化激励
弯振特性
Wind tunnel Power shaft system Modeling Excitation Flexural oscillation characteristics
