Traditional theoretical models are hard to accurately predict the dynamic behavior of the magnetorheological (MR) energy absorbers (MREAs) under impact loading. One of the key issues is that the inertia effect and minor losses are not taken into account, or only one is considered. Hence, the dynamic behavior of MREA with annular channel considering the inertia effect, minor loss and both are theoretically and experimentally studied, respectively. Based on the Herschel-Bulkley (HB) constitutive model, the relationship between the average acceleration of the MR fluid in the annular channel and the acceleration of the piston rod is deduced using average inertia effect method, and an HB model incorporating inertia effect (HBI) model is established. For the minor losses case, an HB-Minor Losses model (HBM) model is obtained via fluid mechanics analysis. At last, an HBIM model is proposed to jointly incorporate both the inertia effect and minor losses. Two MREAs with the same structure design are fabricated, and a drop tower is set up to test the two MREAs placed in parallel at different impact velocities and currents. The experimental results show that the MREAs possess a good dynamic range and the peak MREA force is up to 75 kN. Through comparison between the experimental and theoretical results, the HBIM models are able to better predict the dynamic behavior of the MREA under impact loading compared to HBI and HBM model. Finally, it can be concluded that both minor losses and inertia effect affect the MREA dynamic behavior but the former plays a more important role.
SHOU Mengjie
,
LIAO Changrong
,
YE Yuhao
,
ZHANG Honghui
,
FU Benyuan
,
XIE Lei
. Dynamic Behavior of Magnetorheological Energy Absorber under Impact Loading[J]. Journal of Mechanical Engineering, 2019
, 55(1)
: 72
-80
.
DOI: 10.3901/JME.2019.01.072
[1] 彭志召,张进秋,岳杰,等. 具有并联常通孔的磁流变阻尼器设计与分析[J]. 机械工程学报,2015,51(8):172-177. PENG Zhizhao,ZHANG Jinqiu,YUE Jie,et al. Design and analysis of magnetorheological damper paralleling with constant throttling orifices[J]. Journal of Mechanical Engineering,2015,51(8):172-177.
[2] YANG G,SPENCER B F,CARLSON J D,et al. Large-scale MR fluid dampers:modeling and dynamic performance considerations[J]. Earthquake Engineering & Engineering Vibration,2001,24(3):309-323.
[3] SUN H X,WANG X Y,CHEN Z Q,et al. Wind-induced torsional vibration control effect of bridge with magnetorheological tuned liquid column damper[J]. China Journal of Highway & Transport,2010,23(1):58-65.
[4] 董小闵,彭少俊,于建强. 自供电式汽车磁流变减振器特性研究[J]. 机械工程学报,2016,52(20):83-91. DONG Xiaomin,PENG Shaojun,YU Jianqiang. Study on self-powered magnetorheological damper characteristics for automobile[J]. Journal of Mechanical Engineering,2016,52(20):83-91.
[5] WOO D,CHOI S B,CHOI Y T,et al. Frontal crash mitigation using mr impact damper for controllable bumper[J]. Journal of Intelligent Material Systems and Structures,2007,18(12):1211-1215.
[6] FU B,LIAO C,LI Z,et al. Impact behavior of a high viscosity magnetorheological fluid-based energy absorber with a radial flow mode[J]. Smart Materials and Structures,2017,26(2):025025.
[7] MIKUŁOWSKI G M. Adaptive impact absorbers based on magnetorheological fluids[D]. Warsaw:Institute of Fundamental Technological Research Polish Academy of Sciences,2008.
[8] GHARAPURKAR A A. Robust semi-active control of aircraft landing gear system equipped with magnetorheological dampers[D]. Montreal:Concordia University,2014.
[9] SINGH H J,WERELEY N M. Optimal control of gun recoil in direct fire using magnetorheological absorbers[J]. Smart Materials and Structures,2014,23(5):055009.
[10] OUYANG Q,ZHENG J,LI Z,et al. Controllability analysis and testing of a novel magnetorheological absorber for field gun recoil mitigation[J]. Smart Materials and Structures,2016,25(11):115041.
[11] 胡红生,王炅,钱苏翔,等. 冲击载荷下的磁流变减振器动力学建模与滑模控制[J]. 机械工程学报,2011,47(13):84-91. HU Hongsheng,WANG Jiong,QIAN Suxiang,et al. Dynamic modeling and its sliding controller of mr shock absorber under impact load[J]. Journal of Mechanical Engineering,2011,47(13):84-91.
[12] MAO M,HU W,CHOI Y T,et al. Experimental validation of a magnetorheological energy absorber design analysis[J]. Journal of Intelligent Material Systems and Structures,2013,25(3):352-363.
[13] 董小闵,丁飞耀,管治,等. 面向高速的磁流变缓冲器多目标优化设计及性能研究[J]. 机械工程学报,2014,50(5):127-134. DONG Xiaomin,DING Feiyao,GUAN Zhi,et al. Multi-objective optimization and performance research of magneto-rheological absorber under high speed[J]. Journal of Mechanical Engineering,2014,50(5):127-134.
[14] 鞠锐,廖昌荣,周治江,等. 单筒充气型轿车磁流变液减振器研究[J]. 振动与冲击,2014,33(19):86-92. JU Rui,LIAO Changrong,ZHOU Zhijiang,et al. Car MR fluid shock absorber with mono-tube and charged-gas bag[J]. Journal of Vibration and Shock,2014,33(19):86-92.
[15] WHITE F M. Fluid Mechanics[M]. 7th ed. New York:McGraw-Hill,2011.
