摘要
研究了裂纹转子在平飞和俯冲拉起状态下的非线性响应,建立了数学模型,推导了转子运动方程。由结果发现:响应进入混沌的道路有拟周期环面破裂、周期3运动失稳和阵发性混沌进入混沌三条。俯冲拉起一般会对系统的非线性响应起到抑制作用;但是系统响应的转角振幅明显增大,因此增大了转子失稳的可能性;深裂纹情形下,俯冲拉起的抑制作用不是很明显。
A maneuver load model for action of dive-hike is set up,and motion equations for a cracked Jeffcott rotor in action of dive-hike are derived.Numerical method is employed to analyze its nonlinear response.The response results show that there are three ways leading to chaos: quasi-periodic bifurcation,intermittent bifurcation and unstable period-3 motion.Generally,the action of dive-hike will depress the nonlinear response of the rotor.But its swing amplitude increases obviously,and it may make the rotor lose its stability.If the rotor is with a deeper crack,the depressing effect of the action of dive-hike is unconspicuous.These results can be helpful for fault diagnose or design of aircraft rotor systems.
出处
《振动与冲击》
EI
CSCD
北大核心
2007年第4期21-24,29,共5页
Journal of Vibration and Shock
基金
航空科学基金(编号:03C53016)资助项目
