噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2013年
4期
103-106
,共4页
振动与波%SFD%转子系统%临界转速%灵敏度%优化设计
振動與波%SFD%轉子繫統%臨界轉速%靈敏度%優化設計
진동여파%SFD%전자계통%림계전속%령민도%우화설계
vibration and wave%SFD%rotor system%critical speed%sensitivity%optimization design
挤压油膜阻尼器在一定程度上可以提高旋转机械系统稳定性。运用数值模拟的方法，对SFD―滑动轴承转子系统的灵敏度及动力学优化进行系统研究。研究表明：挤压油膜阻尼器间隙、轴承间隙、转轴刚度及油粘度对前两阶临界转速的影响较大，系统对这些参数的灵敏度相对较高。基于灵敏度分析得到优化的设计变量，采用遗传算法对临界转速进行了优化分析，优化目标是使工作转速尽可能远离临界转速。经过优化后，系统的临界转速得到较大改善。优化设计为提高高速转子系统的动力稳定性提供了理论基础和分析方法，从而为此类转子系统的设计提供参考。
擠壓油膜阻尼器在一定程度上可以提高鏇轉機械繫統穩定性。運用數值模擬的方法，對SFD―滑動軸承轉子繫統的靈敏度及動力學優化進行繫統研究。研究錶明：擠壓油膜阻尼器間隙、軸承間隙、轉軸剛度及油粘度對前兩階臨界轉速的影響較大，繫統對這些參數的靈敏度相對較高。基于靈敏度分析得到優化的設計變量，採用遺傳算法對臨界轉速進行瞭優化分析，優化目標是使工作轉速儘可能遠離臨界轉速。經過優化後，繫統的臨界轉速得到較大改善。優化設計為提高高速轉子繫統的動力穩定性提供瞭理論基礎和分析方法，從而為此類轉子繫統的設計提供參攷。
제압유막조니기재일정정도상가이제고선전궤계계통은정성。운용수치모의적방법，대SFD―활동축승전자계통적령민도급동역학우화진행계통연구。연구표명：제압유막조니기간극、축승간극、전축강도급유점도대전량계림계전속적영향교대，계통대저사삼수적령민도상대교고。기우령민도분석득도우화적설계변량，채용유전산법대림계전속진행료우화분석，우화목표시사공작전속진가능원리림계전속。경과우화후，계통적림계전속득도교대개선。우화설계위제고고속전자계통적동력은정성제공료이론기출화분석방법，종이위차류전자계통적설계제공삼고。
The squeezed film damping (SFD) can improve the stability of rotary mechanical system. Applying numerical simulation method, the sensitivity of the rotor system and the dynamic optimization of the SFD-sliding bearings were studied systematically. The study shows that the SFD clearance, bearing clearance, shaft stiffness and oil viscosity have great effects on the critical speeds of the first two orders, and the system is more sensitive to these parameters than the others. Based on the design variables offered by the sensitivity analysis, genetic algorithm was employed for optimization analysis of the critical speed so that the working speed can keep away from the critical speed as far as possible. After the optimization, the critical speed was greatly ameliorated. This study has supplied a theoretical basis and analysis method for improving the dynamic stability of high-speed rotor systems.
