两种橡胶型发动机隔振器动力特性试验研究
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摘要
对两种苯基硅橡胶材料的航空发动机隔振器的动力特性参数进行了试验研究。建立了试验测试方法的理论模型,分析了工程近似公式在计算隔振器动力特性参数时的误差,并给出了精确计算公式和迭代求解算法。用振动台扫频试验测得了两种隔振器系统常温下三个轴向的动刚度和阻尼比,以及两种隔振器在不同环境温度下X方向的动刚度和阻尼比。试验结果表明,常温下两种隔振器X方向的动刚度都远大于Y、Z方向的动刚度;随着环境温度的升高,两种隔振器X方向的动刚度都逐渐减小;加入阻尼助剂的改进型隔振器的动刚度和阻尼比都大于普通型隔振器。
Dynamic characteristic parameters of two kinds of phenyl silicone rubber vibration isolator in aeroengine were studied experimentally.Firstly,the theoretical model of experimental measurement method was established,and the error of engineering approximate formula used in dynamic characteristic parameters calculation of isolator was analyzed.The accurate formulas and iterative algorithm were given.The dynamic stiffness and damping ratio of two isolators were measured by sweep vibration method at room temperature along three axes,and the dynamic stiffness and damping ratios of two isolators along xdirection and at different ambient temperatures were also measured by same method.Experimental results show that at room temperature,the dynamic stiffness of two isolators along x direction is much larger than that along y and z direction.With the increase of ambient temperature,the dynamic stiffness of two isolators along xdirection decreases gradually.The dynamic stiffness and damping ratio of the improved isolator with damping additive are greater than that of ordinary isolator.
Dynamic characteristic parameters of two kinds of phenyl silicone rubber vibration isolator in aeroengine were studied experimentally.Firstly,the theoretical model of experimental measurement method was established,and the error of engineering approximate formula used in dynamic characteristic parameters calculation of isolator was analyzed.The accurate formulas and iterative algorithm were given.The dynamic stiffness and damping ratio of two isolators were measured by sweep vibration method at room temperature along three axes,and the dynamic stiffness and damping ratios of two isolators along xdirection and at different ambient temperatures were also measured by same method.Experimental results show that at room temperature,the dynamic stiffness of two isolators along x direction is much larger than that along y and z direction.With the increase of ambient temperature,the dynamic stiffness of two isolators along xdirection decreases gradually.The dynamic stiffness and damping ratio of the improved isolator with damping additive are greater than that of ordinary isolator.
引文
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[8]姜洪源,董春芳,敖宏瑞,等.航空发动机用金属橡胶隔振器动静态性能的研究[J].航空学报,2004,25(2):140-142(JIANG Hongyuan,DONG Chunfang,AO Hongrui,et al.Research on dynamic and static characteristics of the wine-mounted engine pylon[J].Acta Aeronautica et Astronautica Sinica,2004,25(2):140-142(in Chinese))
[9]陈永辉,王会利,苏尔敦,等.涡桨发动机橡胶隔振器设计方法研究[J].科学技术与工程,2013,13(20):5889-5893(CHEN Yonghui,WANG Huili,SU Erdun,et al.Design method of aeroengine rubber vibration isolator[J].Science Technology and Engineering,2013,13(20):5889-5893(in Chinese))
[10]林松,张鲲,孙磊,等.橡胶隔振器动态特性的本构研究[J].振动与冲击,2011,30(3):177-179(LIN Song,ZHANG Kun,SUN Lei,et al.Study on dynamic characteristics of rubber isolator[J].Journal of Vibration and Shock,2011,30(3):177-179(in Chinese))
[2] Baklanov V S,Golov I V,Poston S.Vibroisolation of power plants for new generation airplanes with engines of high by-pass ratio[R].AIAA-2004-2823,2004.
[3] Baklanov V S.Low-frequency vibroisolation mounting of power plants for new-generation airplanes with engines of extra-high bypass ratio[J].Journal of Sound and Vibration,2007,308(3):709-720.
[4] Swanson D A,Miller L R,Norris M A.Multidimensional mount effectiveness for vibration isolation[J].Journal of Aircraft,1994,31(1):188-196.
[5]陈熠,贺尔铭,扈西枝,等.大型客机发动机振动载荷传递特性研究[J].西北工业大学学报,2012,30(3):384-389(CHEN Yi,HE Erming,HU Xizhi,et al.Exploring wing-mounted engine vibration transmission for new generation airplanes with turbofan engines of high bypass ratio[J].Journal of Northwestern Polytechnical University,2012,30(3):384-389(in Chinese))
[6]姚起杭,葛祖德,潘树祥,等.航空用金属丝网减振器的设计研制[J].机械科学与技术,2002,21(增刊1):20-22(YAO Qihang,GE Zude,PAN Shuxiang,et al.The design and development of aviation wire netting isolator[J].Mechanical Science and Technology,2002,21(Suppl.1):20-22(in Chinese))
[7] Rancourt D,Whiteford G P,Lemire J.A systematic approach to evaluate the effectiveness of engine mount systems[R].AIAA-2003-1894,2003.
[8]姜洪源,董春芳,敖宏瑞,等.航空发动机用金属橡胶隔振器动静态性能的研究[J].航空学报,2004,25(2):140-142(JIANG Hongyuan,DONG Chunfang,AO Hongrui,et al.Research on dynamic and static characteristics of the wine-mounted engine pylon[J].Acta Aeronautica et Astronautica Sinica,2004,25(2):140-142(in Chinese))
[9]陈永辉,王会利,苏尔敦,等.涡桨发动机橡胶隔振器设计方法研究[J].科学技术与工程,2013,13(20):5889-5893(CHEN Yonghui,WANG Huili,SU Erdun,et al.Design method of aeroengine rubber vibration isolator[J].Science Technology and Engineering,2013,13(20):5889-5893(in Chinese))
[10]林松,张鲲,孙磊,等.橡胶隔振器动态特性的本构研究[J].振动与冲击,2011,30(3):177-179(LIN Song,ZHANG Kun,SUN Lei,et al.Study on dynamic characteristics of rubber isolator[J].Journal of Vibration and Shock,2011,30(3):177-179(in Chinese))