CAJ | 학술논문

通过理论分析和数值计算,研究在Jeffcott转子的圆盘里加入单、双滚珠的转子系统的周期解及其稳定性.研究表明,转子在临界转速以下运行时,单、双滚珠均使转子的静不平衡振动加剧,平衡恶化:而在临界转速以上运行时,特定参数的单滚珠能使转子自动达到静平衡,而参数设计合理的双滚珠始终能使转子达到自动静平衡,能有效地消除不平衡振动.另外,由于滚珠运动的影响,在转速刚过临界转速附近,系统发生自激振动.
통과이론분석화수치계산,연구재Jeffcott전자적원반리가입단、쌍곤주적전자계통적주기해급기은정성.연구표명,전자재림계전속이하운행시,단、쌍곤주균사전자적정불평형진동가극,평형악화:이재림계전속이상운행시,특정삼수적단곤주능사전자자동체도정평형,이삼수설계합리적쌍곤주시종능사전자체도자동정평형,능유효지소제불평형진동.령외,유우곤주운동적영향,재전속강과림계전속부근,계통발생자격진동.
Through theoretical analysis and numerical calculation, periodic solutions and their stabilities of Jeffcott rotor with a disc on which single and double balls are set, are studied and the following results are obtained: When the rotor speed is below the critical speed, both single and double balls can make vibration caused by static unbalance of rotor more intensified and the balance of rotor worsens. When the rotor speed is above the critical speed, only single ball with specific parameters can make the rotor keep static balance automatically, and for double bails, they can make the rotor keep static balance automatically all the time if their parameters are reasonable and the rotor unbalance can be eliminated effectively. In addition, when the rotor speed is near the critical speed of rotation, the serf-excited vibration of the rotor happens because of the influence of balls.