Tuned Mass Damper and Magnetorheological Attenuator Compared
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There are several damper solutions for dampening undesirable vibration. A magnetorheological damper and a tuned mass damper, for example. Here we talk about the pros and cons of these two different attenuators.
Tuned Mass Damper Positives and Negatives
The idea of a tuned mass damper (TMD) is to somehow wisely react to shake. A distinction I comply with is that a TMD brings about a counteracting force by shifting a mass at counter phase with the root vibration.
An advantage of a TMD is evidently its capability to form a important change by imposing a force to the vibrating structure via a moving weight. This can also be one of its big down sides. If you happen to use the force continuously at wrong instant, the vibration process can become instable if the movement of the tuned mass damper occurs in the resonance wavelength. And operation at the resonance frequency is very typical, as the resonance wavelength is often the one being killed.
Ok, the fact remains that with a semi-active actuator there’s also the possibility of messing with something at the resonance point by handling the damper improperly, but at least no supplementary force with a mobile mass is used and therefore the possible harm is not as dangerous.
An extra downside is the increased number of moving materials. A tuned mass damper is also the one that involves the most hand-operated assembly work.
Semi-Active Attenuator Pluses and Minuses
The working idea of a semi-active actuator is based on the substance features. As for the magnetorheological attenuator, the dampening material varies its viscosity. The content is a ferrofluid: oil that contains metal particles. The theory is that any time you apply a magnetic field to the content, the metallic particles are arranged according to the field lines and make the fluid stiff. This creates in practice an actuator which might be changed on and off in just milliseconds.
A downside of the damper is plainly its quite reduced volume of usage. This is predominantly because of the fact that it’s pretty fresh solution available in the market and not very broadly tested yet. Nevertheless, this is frequently changing because technological study material gathers up.
In my view the semi-active attenuator combines the greatest parts of the previous attenuator categories:
Small measurements
A small amount of moving components
Responds real-time to a number of vibration wavelengths
In addition, due to its small dimensions the magnetorheological attenuator may be installed beside a pre-existing passive attenuator which is currently attenuating certain wavelengths. The magnetorheological damper may then focus on the shake that can vary with time.
Do you need to understand how exactly the magnetorheological attenuator outruns the tuned mass damper? Look into Magnetorheological Damper Laboratory! If you do not undoubtedly need a tuned mass damper, I recommend a semi-active one.
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