摘要
利用传递矩阵方法分析直升机旋翼试验台传动系统振动特性。获得传动系统扭转振动模态及各阶模态振型、传动系统横向振动各阶固有频率及横向振动与试验台支撑刚度关系。实验测量旋翼试验台三向振动,旋翼转速经试验台共振区达960 r/min并稳定运行2～3 s后试验台振动发散,该回转频率对应横向振动一阶固有频率。经分析知振动发散与试验台主轴支撑刚度有关,并给出解决此类故障两种方法。
Transfer Matrix Method（ TMM） was used to analyze the vibration characteristics of a helicopter test rig.The torsional vibration natural frequencies and the modal shapes were obtained. Each order natural frequency and the relationship between the lateral vibration and support stiffness of the test rig transmission were obtained. By experiment,vibrations in three directions were measured. After the rotor runs over the resonance of the test rig at a speed of 960 r /min,the test rig will run in a steady state for about 2 ～3 seconds and then the vibration goes to diverge. The frequency of the spindle speed leading to vibration divergence is just right the 1st order natural frequency of the lateral vibration. Based on the vibration analysis,it is concluded that the vibration divergence is related to the support stiffness of the transmission. Two methods for dealing with this malfunction were given.
出处
《振动与冲击》
EI
CSCD
北大核心
2014年第16期177-182,共6页
Journal of Vibration and Shock
基金
北京林业大学青年科技启动基金(BLX2011017)
关键词
传动系统
扭转振动
横向振动
实验
transmission system
torsional vibration
lateral vibration
experiment
