Dynamical Behavior Analysis of Micro Beams Conveying Fluid in Longitudinal Magnetic Fields

JIANG Pengfei; YAN Yan; WANG Wenquan

doi:10.21656/1000-0887.390185

Volume 40 Issue 5

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JIANG Pengfei, YAN Yan, WANG Wenquan. Dynamical Behavior Analysis of Micro Beams Conveying Fluid in Longitudinal Magnetic Fields[J]. Applied Mathematics and Mechanics, 2019, 40(5): 498-507. doi: 10.21656/1000-0887.390185

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Dynamical Behavior Analysis of Micro Beams Conveying Fluid in Longitudinal Magnetic Fields

doi: 10.21656/1000-0887.390185

¹Department of Engineering Mechanics, Kunming University of Science and Technology, Kunming 650500, P.R.China;²School of Civil Engineering, Southeast University, Nanjing 210096, P.R.China

Funds: The National Natural Science Foundation of China（General Program）(11662006)

Received Date: 2018-06-28
Rev Recd Date: 2018-09-12
Publish Date: 2019-05-01

Abstract

Abstract

Such nonlinear characteristics as mechanics, magnetics and fluidstructure interactions exist in the microelectromechanical system (MEMS) driven by the magnetic field, which will affect the safety and reliability of the system. Based on the nonlocal Eulerian beam model, the dynamical behaviors of fluidconveying micro beams (a kind of MEMS) in magnetic fields were studied. The dynamical system bifurcation theory and the harmonic balance method were used to study the stability and amplitudefrequency characteristic curves of the pinnedpinned micro beam system. The results show that, the frequency of the beam can be adjusted through changes of the magnetic field intensity, the flow velocity and the system damping. The smallscale effects tend to change the critical velocity and the existence of damping can change the number of critical velocities and the type of bifurcation.
- micro beam conveying fluid,
- longitudinal magnetic field,
- fluidstructure interaction,
- stability,
- vibration frequency

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References(15)

References

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