Modeling and tests for response features of MR damper as a shock isolation device
LI Zhao-chun 1, ZHOU Bing-qian1, GU Quan1, WANG Jiong2
1. School of Mechatronic Engineering, Nanjing Forestry University, Nanjing 210037, China;
2. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Response features of a magnetorheological (MR) damper as a shock isolation device with fast response requirement were modeled and tested. A theoretical model for response features of magnetic flux density was established according to the electromagnetic circuit of the MR damper’s coil. The response time constant of the model was determined with the frequency measurement method. Step responses of the magnetic flux density of the MR damper under different currents were tested. The results showed that currents with different amplitudes have no effect on response of magnetic flux density, the average response time constants are 4.9ms (rising step) and 2.8ms (drop step). Furthermore, a second order response model for shear yield stress was established. The step response of the shear yield stress of the MR damper under impact loading was measured utilizing an impact test rig. It was shown that the response time constant obtained with model fitting is 4.8ms; the proposed second order model for shear yield stress agrees well with test data, so this model can effectively describe response features of the MR damper under impact loading.
李赵春1,周冰倩1,顾权1,王炅2. 冲击缓冲用磁流变阻尼器的响应特性模型与实验研究[J]. 振动与冲击, 2018, 37(5): 163-168.
LI Zhao-chun 1, ZHOU Bing-qian1, GU Quan1, WANG Jiong2. Modeling and tests for response features of MR damper as a shock isolation device. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(5): 163-168.
[1] Carlson J D. What makes a good MR fluid? [J]. Journal of Intelligent Material Systems and Structures, 2003, 13(7-8): 431-435.
[2] Sahin H, Gordaninejad F, Wang X J, et al. Response time of magnetorheological fluids and magnetorheological valves under various flow conditions[J]. Journal of Intelligent Material Systems and Structures, 2012, 23(9): 949-957.
[3] Choi Y T, Wereley N M. Drop-induced shock mitigation using adaptive magnetorheological energy absorbers incorporating a time lag[J]. Journal of Vibration and Acoustics, 2015, 137(1): 011010.
[4] Ahmadian M, Appleton R J, Norris J A. An analytical study of fire out of battery using magneto-rheological dampers[J]. Shock and vibration, 2002, 9(3): 129-142.
[5] Li Z C, Wang J. A gun recoil system employing a magnetorheological fluid damper[J]. Smart Materials and Structures, 2012, 21(10), 105003-105012.
[6] Zhu C S. The response time of a rotor system with a disk-type magnetorheological fluid damper[J]. International Journal of Modern Physics, 2005, 19(7-9): 1506-1512.
[7] Zheng J J, Li, Z C Koo J H, Wang J. Analysis and compensation methods for time delays in an impact buffer system based on magnetorheological dampers[J]. Journal of Intelligent Material Systems and Structures, 2015, 26(6): 690-700.
[8] Sahin H, Gordaninejad F, Wang X, et al. Response time of magnetorheological fluids and magnetorheological valves under various flow conditions[J]. Journal of Intelligent Material Systems and Structures, 2012, 23(9): 949-957.
[9] Koo J H, Concalves F D. Ahmadian M. A Comprehensive analysis of the response time of MR dampers[J]. Smart materials and structures, 2006, 15(2): 351-358.
[10] Strecker Z, Roupec J, Mazurek I. Design of magnetorheological damper with short time response[J]. Journal of Intelligent Material Systems and Structures, 2015, 26(14): 1951-1958.
[11] Kikuchi T, Noma J, Akaiwa S, et al. Response time of magnetorheological fluid–based haptic device[J]. Journal of Intelligent Material Systems and Structures, 2016, 27(7): 859-865.
[12] 李赵春, 王炅. 火炮磁流变阻尼器试验分析与动态模型[J]. 振动与冲击, 2012, 31(1): 64-67.
LI Zhao-chun, WANG Jiong. Experimental analysis and dynamic model of a gun magneto-rheological damper[J]. Journal of vibration and shock, 31(1): 64-67.
[13] Laun H M, Gabriel C. Measurement modes of the response time of a magneto-rheological fluid (MRF) for changing magnetic flux density[J]. Rheol. Acta, 2007, 46: 665-676.
[14] 张莉洁, 常家东, 王炅, 等. 磁流变冲击后坐控制系统试验研究[J].振动与冲击, 2014, 33(22): 115-120.
ZHANG Li-jie, Chang Jia-dong, Wang Jiong, et al. Experimental research of Magneto-Rheological recoil control system[J]. Journal of vibration and shock, 2014, 33(22): 115-120.