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Optimal design of double-coil MR damper and its vibration reduction characteristics tests |
MA Liang1, FAN Jie3, LI Chenghao1, HAN Zhixuan1, WANG Jun2 |
1.Tianjin Municipal Key Lab for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin 300300, China;
2.State Key Lab of Tribology, Tsinghua University, Beijing 100084, China;
3.School of Aeronautics, Northwestern Polytechnic University, Xi’an 710072, China |
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Abstract A double coil magnetorheological damper (MR damper) based on squeeze mode was obtained by using the coupling design method of integrated magnetic circuit and component design. On the basis of the closed magnetic circuit, the initial structural parameters were obtained by considering the properties of magnetic field, magnetic circuit, structural characteristics of damper, their interaction and feedback to the magnetic circuit. The multi-objective optimization of key parameters was carried out by using Simulated Annealing Algorithm to optimize the comprehensive performance of the damper, and the design method of MR damper was concluded. By the multi-dimensional magnetic field measurement test-bed, the magnetic field of the oil film working face was measured, which verifies that the measured values of the double coil MR damper under different excitation currents are in good agreement with the simulation values. Finally, the optimized dual-coil MR damper was introduced into the rotor system, and the rotor experimental platform supported by the MR damper was built. The unbalanced response experiment of the rotor system supported by the MR damper was carried out. It is found that the MR damper with a suitable current can provide effective damping for the rotor system, which greatly suppresses the vibration amplitude of the rotor system near the critical speed; Under the action of excessive current, the stiffness effect of the MR damper plays a major role, which will limit the squeezing of the oil film in the clearance of MR damper, thereby weakening the damping effect of MR damper. This research provides certain guidance for the design of MR damper and has potential application value.
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Received: 28 March 2022
Published: 15 March 2023
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