Vibration characteristics of MR cantilever sandwich beams: experimental study
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Citations
Stability/instability of magnetorheological core sector structure for mechanical control braking system by the intelligent computer method
Magnetic Field Analysis of the Actuator in a Semi-Active Vibration Control of the Beam with MR Fluid
Design optimization of a viscous clutch with an electrorheological fluid
Influence of magneto-rheological fluid pocket configuration on the dynamic response of the composite sandwich beam
Dynamic response of a MRE sandwich structure under a non-homogenous magnetic field
References
Commercial magneto-rheological fluid devices
Magnetorheological and electrorheological materials in adaptive structures and their performance comparison
Vibration suppression capabilities of magnetorheological materials based adaptive structures
Smart prosthetics based on magnetorheological fluids
Vibration Characteristics of a Composite Beam Containing an Electrorheological Fluid
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Frequently Asked Questions (16)
Q2. What contributions have the authors mentioned in the paper "Vibration characteristics of mr cantilever sandwich beams: experimental study" ?
This experimental study investigates controllability of vibration characteristics of magnetorheological cantilever sandwich beams.
Q3. How many magnets were added to the arrangement used for 0.14 T?
In order to generate the magnetic field of 0.24 T, eight Supermagnete Q252513N magnets were added to the arrangement used for 0.14 T.
Q4. What is the effect of a stiffening of the fluid in the regions?
Stiffening the fluid in the regions away from the clamps of the beam, results in a decrease in the natural frequency of the beam compared with the natural frequency in the absence of field.
Q5. What is the effect of the magnetic field on the resonant frequency of the PET beam?
It can be observed that for stronger magnetic fields, the resonant natural frequencies are shifted to lower frequencies with smaller vibration levels.
Q6. How was the magnetic field of the aluminium beam tuned?
With a magnetic field of 0.24 T closer to the free end, the aluminium beam was tunable by 17.5% of the initial natural frequency.
Q7. What was the effect of the magnetic field on the aluminium beam?
Because the distance between the magnetic poles was the same, a stronger magnetic field was achieved on the sides of the aluminium beam (0.32 T), resulting in the increase of 15.9% for the first natural frequency.
Q8. How was the natural frequency of the beam increased?
When the magnetic poles were parallel to the wide face of the aluminium MR beam, a magnetic field of 0.23 T was generated resulting in the increase in the natural frequency by 5.9%.
Q9. What is the effect of partial activation of the MR beam?
In some cases, the partial activation of the MR beam results in smaller vibration amplitudes than when the beam is fully activated.
Q10. How was the natural frequency of the magnetic field tunable?
For a constant magnetic field magnitude, the natural frequency was tunable by 5.0% in the case of the magnetic field with alternating directions compared to the 8.1% for the same direction arrangement.
Q11. How many magnets were attached to the aluminium housing?
Four magnets were placed on top of each aluminium housing and were attached by magnetic forces to the magnets inside the housing (figure 11).
Q12. What is the effect of the magnetic field on the beam?
It is important to consider these arrangements when working with permanent magnets, since adjacent magnetic fields with opposite directions cancel themselves in their boundaries resulting in a lower overall intensity along the beam.
Q13. What configuration was used to study the effect of the magnetic field on the MR beam?
In that configuration, the effect of two different locations of the magnetic poles was studied: parallel and perpendicular to the wide face of the MR beam.
Q14. What arrangement is the reliable for the MR beam?
One of the arrangements suggests having adjacent magnets in alternating directions compared to the case where the magnetic field is generated in the same direction.
Q15. Why is the PET beam shifted to lower frequencies with smaller vibration levels?
This behaviour might be due to the mass concentration of the iron particles in specific places and the non-homogeneous stiffening of the MR fluid along the beam.
Q16. What was the effect of the natural frequency of the aluminium beam on the vibration amplitude?
the natural frequency of the aluminium beam was tuned to achieve variations of 17.5% and the vibration amplitude was decreased by as much as 15.7 dB.