Effects of Two Cracks in Shafts on Dynamic Characteristics of Two-span Rotor-bearing System
The nonlinear dynamic model of two-span rotor-bearing system with two cracks in shafts is set up,and the effects of two cracks in shafts on dynamic characteristics of the rotor-bearing system are analyzed.Along with the increase of the crack depth in first span,the chaotic and periodic motions increase,and the quasi-periodic motion decrease in the supercritical rotate speed.There are harmonic elements of 1/4,1/2 and 3/4 frequency division within the sub-critical speed range at different crack depths.There appears the frequency doubling resonance obviously when the crack depths are larger.Along with the increase of the crack depth in second span,the main influences to the responses of system are in the second span.The chaotic regions increase and then decrease and the periodic motions region increase in the sub-critical rotate speed range.
Rotor-bearing System Crack in shaft Nonlinear characteristics
YueGang LUO SongHe ZHANG Bin WU HongYing HU
Dalian Nationalities University, Dalian 116600, China
国际会议
香港
英文
1270-1274
2012-12-11（万方平台首次上网日期，不代表论文的发表时间）