常数机动载荷对航空发动机转子系统振动特性的影响
Effect of constant maneuver load on vibration characteristics of aero-engine’s rotor system
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摘要: 考虑了一个带有非线性弹性支承的偏置圆盘Jeffcott转子系统,研究了常数机动载荷对该系统振动特性的影响.通过数值计算发现:常数机动载荷取不同值时,系统的幅频特性曲线可能出现滞后区变窄、消失以及二次跳跃现象;频率比不同值时,系统振幅与常数机动载荷关系曲线差别较大,在特定转速下,先将常数机动载荷缓慢增加至一定值,再缓慢降低至零,可能引起系统由小振幅稳态解跳跃至大振幅稳态解而无法恢复;转子轴心偏移量随着常数机动载荷增加而增大,受系统工作转速影响不大.
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关键词:
- 常数机动载荷 /
- 水平盘旋 /
- 俯冲拉起 /
- 航空发动机 /
- Jeffcott转子系统
Abstract: An asymmetric placed Jeffcott rotor system with nonlinear elastic support was considered,and the influences of constant maneuver load on the dynamics of the rotor system were studied numerically.By setting different constant maneuver loads,it was found that the relationship between the amplitude and the excitation frequency may lead to different phenomenons including:hysteresis region narrowing,disappearance and secondary jump.With the variation of the frequency ratio,the relationship between the amplitude and the constant maneuver load is changed significantly.Under certain excitation frequency,if the constant maneuver load crosses a critical value,the amplitude of the system can jump from a small level to a large one,and not drop down even though the load is reduced to zero.In addition,the offset of the rotor's axis is not closely related to the excitation frequency,but mainly depended on the amount of the constant maneuver load.-
Key words:
- constant maneuver load /
- hovering /
- dive-hike /
- aero-engine /
- Jeffcott rotor system
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[1] 陈予恕, 张华彪.航空发动机整机动力学研究进展与展望[J].航空学报, 2011, 32(8):1371-1391. CHEN Yushu, ZHANG Huabiao.Review and prospect on the research of dynamics of the aero-engine system[J].Acta Aeronautica et Astronautica Sinica, 2011, 32(8):1371-1391.(in Chinese) [2] 林富生, 孟光.飞行器机动飞行时发动机转子等变速运动的动力学特性研究[J].航空学报, 2002, 23(4):356-359. LIN Fusheng, MENG Guang.Dynamics of a maneuvering rotor in constant acceleration and deceleration[J].Acta Aeronautica et Astronautica Sinica, 2002, 23(4):356-359.(in Chinese) [3] 林富生, 孟光.机动飞行飞行器内具有初始弯曲和刚度不对称的转子运动模型[J].航空动力学报, 2002, 17(5):610-614. LIN Fusheng, MENG Guang.Mathematical modeling of a maneuvering asymmetric rigidity rotor with initial bending[J].Journal of Aerospace Power, 2002, 17(5):610-614.(in Chinese) [4] 林富生, 孟光.重力对具有初弯和不对称刚度机动转子特性的影响[J].机械强度, 2002, 24(3):320-326. LIN Fusheng, MENG Guang.Influence of gravity on the dynamics of a maneuvering rotor with initial bending and asymmetry[J].Journal of Mechanical Strength, 2002, 24(3):320-326.(in Chinese) [5] 林富生, 孟光.飞行器内SFD-转子系统的动力学特性研究[J].振动工程学报, 2004, 17(4):403-407. LIN Fusheng, MENG Guang.Study on the dynamic characteristics of SFD-rotor system in aircrafts[J].Journal of Vibration Engineering, 2004, 17(4):403-407.(in Chinese) [6] 林富生, 孟光.飞行器内碰摩转子模型的光滑处理及非线性研究[J].振动工程学报, 2004, 17(2):184-189. LIN Fusheng, MENG Guang.Study on the nonlinear characteristics of a maneuvering rotor system with smoothly treated step impact-rubbing forces[J].Journal of Vibration Engineering, 2004, 17(2):184-189.(in Chinese) [7] 林富生, 孟光.飞行器渐变加速对裂纹转子系统非线性响应的影响[J].机械强度, 2005, 27(5):594-597. LIN Fusheng, MENG Guang.Study on nonlinear characteristics of a rotor system with transverse crack in an asymptotic accelerating aircraft[J].Journal of Mechanical Strength, 2005, 27(5):594-597.(in Chinese) [8] 祝长生, 陈拥军.机动飞行时航空发动机转子系统的振动特性[J].航空学报, 2006, 27(5):835-841. ZHU Changsheng, CHEN Yongjun.Vibration characteristics of aero-engine's rotor system during maneuvering flight[J].Acta Aeronautica et Astronautica Sinica, 2006, 27(5):835-841.(in Chinese) [9] 祝长生, 陈拥军.机动飞行时发动机转子系统动力学统一模型[J].航空动力学报, 2009, 24(2):371-377. ZHU Changsheng, CHEN Yongjun.General dynamic model of aero-engine's rotor system during maneuvering flight[J].Journal of Aerospace Power, 2009, 24(2):371-377.(in Chinese) [10] 魏海涛, 范晓明.机动飞行中双转子系统的振动响应分析//中国航空学会第十届航空发动机结构强度与振动会议论文集.安徽 黄山:中国航空学会, 2001:315-320. [11] 徐敏, 廖明夫.机动飞行条件下带挤压油膜阻尼器的Jeffcott转子系统的振动特性[J].航空动力学报, 2003, 18(3):394-401. XU Min, LIAO Mingfu.The vibration performance of the Jeffcott rotor system with SFD in maneuver flight[J].Journal of Aerospace Power, 2003, 18(3):394-401.(in Chinese) [12] 杨永锋, 任兴民, 秦卫阳.水平盘旋下裂纹转子的非线性响应[J].航空动力学报, 2007, 22(6):1007-1012. YANG Yongfeng, REN Xingmin, QIN Weiyang.Study of nonlinear response of cracked Jeffcott rotor in hovering state[J].Journal of Aerospace Power, 2007, 22(6):1007-1012.(in Chinese) [13] 杨永锋, 任兴民, 秦卫阳.俯冲拉起下裂纹转子的非线性[J].振动与冲击, 2007, 26(4):21-24. YANG Yongfeng, REN Xingmin, QIN Weiyang.Nonlinear response analysis of a cracked Jeffcott rotor in action of dive-hike[J].Journal of Vibration and Shock, 2007, 26(4):21-24.(in Chinese) [14] 于渊博.航空发动机裂纹转子系统的非线性特性研究[D].西安:西安工业大学, 2009. YU Yuanbo.Research on aero-engine non-linear characteristics of cracked rotor systems[D].Xi'an:Xi'an Technological University, 2009.(in Chinese) [15] 高洁, 朱培申, 高正红.高等飞行动力学[M].北京:国防工业出版社, 2004. [16] 钟一鄂, 何衍宗, 王正, 等.转子动力学[M].北京:清华大学出版社, 1984. [17] ZHANG Huabiao, CHEN Yushu, LI Jun.Bifurcation on the synchronous full annular rub of a rigid-rotor elastic-support system[J].Applied Mathematics and Mechanics, 2012, 33(7):812-827.
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