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- Title
Dynamic Characteristic Analysis of New Bell Plate Controllable Multi-Inertia Channel MRF Mount with Wide Frequency Isolation.
- Authors
Lin, Z. H.; Wu, M. Z.; Chen, Y. X.
- Abstract
To meet the excitation frequency in the range of 0-200 Hz engine mount to achieve better noise, vibration, and harshness performance (NVH). This paper proposes a new bell plate controllable multi-inertia channel MRF (magnetorheological fluid) mount for dynamic characteristic analysis and research. Firstly, designing a multi-flow channel MRF damper and verifying by the experimental method that a larger current can achieve switching and closing of the flow channels. Secondly, the lumped parameter models of controllable multi-inertia channel MRF mount and controllable multi-inertia channels MRF mount with two bell plates and decoupler membrane combinations (new bell plate multi-inertia channel MRF mount) are solved separately, and the dynamic characteristics of the mounts at high and low frequencies are analyzed. Finally, the 3-degree-of-freedom mount system of the 1/4 car model is built to analyze the effects of different inertia channel switching and closing on the relative displacement of the vehicle frame and engine, and the transfer force of the engine to the vehicle frame. The results show that the designed new bell plate controllable multi-inertia channel MRF mount can achieve adjustable dynamic stiffness and damping in the frequency range of 0-50 Hz, and has a small dynamic stiffness value in the range of 50 Hz-200 Hz. Therefore, the designed MRF mount can achieve wide frequency vibration isolation.
- Subjects
MAGNETORHEOLOGICAL fluids; FREQUENCIES of oscillating systems; DYNAMIC stiffness; VIBRATION isolation; CHANNEL flow; BELL helicopters
- Publication
Experimental Techniques, 2023, Vol 47, Issue 1, p327
- ISSN
0732-8818
- Publication type
Article
- DOI
10.1007/s40799-021-00539-0