CAJ | 학술논문

建立汽轮机低压转子系统的动力学模型,利用数值积分法和Poincare映射法对其进行非线性特性研究,得出转子系统的分岔图、Poincare映射图和最大Lyapunov指数图.分析随转速变化和径向密封间隙对转子动力学行为的影响.结果表明：在转速变化时,系统经过周期运动后进入混沌状态,最后又回到一周期状态.在径向密封间隙变化时,转子经概周期运动后进入混沌状态.
건립기륜궤저압전자계통적동역학모형,이용수치적분법화Poincare영사법대기진행비선성특성연구,득출전자계통적분차도、Poincare영사도화최대Lyapunov지수도.분석수전속변화화경향밀봉간극대전자동역학행위적영향.결과표명：재전속변화시,계통경과주기운동후진입혼돈상태,최후우회도일주기상태.재경향밀봉간극변화시,전자경개주기운동후진입혼돈상태.
A dynamic model of rotor systems with low-pressure steam turbine was established in this paper,and the nonlinear dynamic behaviors caused by gas-exciting were studied.The bifurcation diagrams and maximal Lyapunov exponent maps were given about Rotate speed and Radial sealing clearance.The results indicated that the system through periodic motion entered into chaos with the rotate speed changing,and finally backed to one period state.In seal clearance changes,the rotor after periodic movement entered into chaos.