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多跨不平衡轴系的非线性动力学建模 被引量:3
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作者 曹树谦 陈予恕 《非线性动力学学报》 2002年第1期26-32,共7页
给出了多跨弹性转子系统非线性动力学建模的准则,建立了一个两跨四支撑的16DOF不平衡非线性弹性转子的动力学模型,从有限元法导出了转子系统各段横向刚度系数的解析表达式,求出转子系统各轴颈处的等效负载,模型中采用非稳态油膜力... 给出了多跨弹性转子系统非线性动力学建模的准则,建立了一个两跨四支撑的16DOF不平衡非线性弹性转子的动力学模型,从有限元法导出了转子系统各段横向刚度系数的解析表达式,求出转子系统各轴颈处的等效负载,模型中采用非稳态油膜力模型。本文工作为研究多跨转子系统的非线性动力特性提供了条件。 展开更多
关键词 多跨不平衡 非线性动力学建模 横向刚度 非线性油膜力 有限元法
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动平衡技术在矿井主通风机维保中的应用
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作者 刘石 《内蒙古煤炭经济》 2023年第21期156-158,共3页
本文主要探讨矿井主通风机在运行过程中存在的动平衡、轴承磨损和轴系不平衡等问题,介绍动平衡技术在主通风机维保中的应用解决方案,包括现场动平衡校验、轴承磨损修复和轴系不平衡校正。最后,评价动平衡技术在主通风机上的应用效果。
关键词 平衡技术 矿井主通风机 维保 承磨损 轴系不平衡
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Torsional vibration analysis of lathe spindle system with unbalanced workpiece 被引量:5
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作者 郭瑞 JANG Sung-Hyun CHOI Young-Hyu 《Journal of Central South University》 SCIE EI CAS 2011年第1期171-176,共6页
For the purpose of analyzing the torsional vibration caused by the gravitational unbalance torque arisen in a spindle system when it is machining heavy work piece,a 10-DOF lumped parameter model was made for the machi... For the purpose of analyzing the torsional vibration caused by the gravitational unbalance torque arisen in a spindle system when it is machining heavy work piece,a 10-DOF lumped parameter model was made for the machine tool spindle system with geared transmission.By using the elementary method and Runge-Kutta method in Matlab,the eigenvalue problem was solved and the pure torsional vibration responses were obtained and examined.The results show that the spindle system cannot operate in the desired constant rotating speed as far as the gravitational unbalance torque is engaged,so it may cause bad effect on machining accuracy.And the torsional vibration increases infinitely near the resonant frequencies,so the spindle system cannot operate normally during these spindle speed ranges. 展开更多
关键词 unbalanced work piece gravitational unbalance torque torsional vibration spindle system geared transmission
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Modeling unbalanced rotor system with continuous viscoelastic shaft by frequency-dependent shape function
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作者 王书翰 郭伟 +2 位作者 徐向阳 刘艳芳 黎文勇 《Journal of Central South University》 SCIE EI CAS 2013年第12期3421-3430,共10页
A reduced-order dynamic model for an unbalanced rotor system is developed, taking the coupling between torsional and lateral vibrations into account. It is assumed that a shaft is regarded as a continuous viscoelastic... A reduced-order dynamic model for an unbalanced rotor system is developed, taking the coupling between torsional and lateral vibrations into account. It is assumed that a shaft is regarded as a continuous viscoelastic shaft with unbalanced and small deformation properties. The equations of motion for the torsional and lateral vibrations are derived using Lagrange's approach with the frequency-dependent shape function. The rotor torsional vibration is coupled with the lateral vibrations by unbalance elements in a way of excitations. Simulation and experiment results show clearly that the torsional vibration has strong impact on the rotor lateral vibrations, and it causes subharmonic and superharmonic excitations through unbalance elements, which leads to the superharmonic resonances in the lateral vibrations. This model with low-order and high accuracy is suitable for rotor dynamic analysis in real time simulation as well as for active vibration control syntheses. 展开更多
关键词 rotor dynamics distributed unbalance rotor shape function torsional and lateral vibrations coupling
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