Questions tagged [vibration]
Vibration of mechanical systems is a field studied by mechanical engineers and civil engineers
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Why are mounting hole locations for many Arduino and Nucleo boards so strange?
The mounting hole positions are so simple in case of the Raspberry Pi 4 for example:
But on the Arduino Mega, you see this odd constellation:
And on the Arduino Uno R3, they are placed very ...
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Can I use logarithmic decrement to get damping ratio when given data is acceleration?
Since I was going to get the damping ratio from time domain, the first thought was using logarithmic decrement method. But I'm not sure if I can use it when the given data is acceleration-time. Can I ...
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Some questions at interpreting FRF from vibration test
Currently going through impact hammer test of cantilever beam(200mmx20mmx2mm) which is made of particulate composite(Epoxy/PZT/CB). Hammer sensitivity is 2.25mV/N and accelerometer sensitivity is ...
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Vibrating hollow sphere
I would like to make a hollow sphere that can vibrate like a tuning fork. It should go like this:
Place the sphere on a table
Strike the sphere with something like a spoon
The sphere vibrates (...
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How would you handle the rebalancing of a bearing cage?
I am a intern who was tasked with finding the correct amount to mill off (in an angle) of a bearing cage (basically an annulus with gaps in it to hold the balls or rollers) to bring it back into ...
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Is there explicit expersion for the natural frequency of a cantilever timoshenko beam?
I am trying to find a closed form solution for the natural frequency of cantilever Timoshenko beam. In mechanical vibration (Rao, 5th edition) he outlined the details to include the Effects of Rotary ...
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Finding the best fit between Ansys model results and measurd values to optimize the parameters
I have the final element model of an experimental rig respresenting a vibrating system. The time domain results from both are known. I need to reduce the error between the results/find the best fit ...
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How to Design System for Resonating Tuning Forks from Base
I have seen videos like this where two tuning forks with matched frequencies are attached to resonant chambers and the sound from one fork can be used to resonate the other fork.
I am interested in ...
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Induce vibration on metal ball
Suppose that I have a hollow, metal ball that lies on a table.
How do I induce a vibration on this ball? I want to be able to control the frequency, so it is a forced vibration (not natural vibration)....
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Changing the relative equilibrium position for a 2-mass spring-mass system
I am trying to solve a double spring-mass system that is positioned vertically (I currently have the pendulum at an angle of 0 in my code below). I derived the system of ODE's required, and I get this ...
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Ansys Pedestrian-Induced Vibration on Bridge
I have a concrete girder box bridge that is 40 m long and 4 meters wide, and I would like to simulate the response of the bridge using Ansys random vibration for pedestrian traffic. What are ...
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How to balance an irregular shape on a motor shaft?
I have an irregular shaped object about 100g in weight and 3x3x3 cm in size that I'd like to mount on a shaft (eg of a small motor) and spin. The trick is, I'd like it to be pretty close to perfectly ...
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what kind of Vibration Motor should I choose and how can I achieve my goal?
I'm building a vibration table for testing the durability of a metal rack, I want the vibration motor to create an even and average vertical displacement to the table, what kind of Vibration Motor ...
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Topology optimization issue (or not an issue, which is the issue)
I am currently doing some work in topology optimization regarding optimizing for the dynamic compliance of a beam structure but I am running into some issues. Well actually I am not running into some ...
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Controlled oscillation of a piano string by electromagnetic, mechanical, or other means
What would be a good way to actively control the loudness of an acoustic piano note over time after the note has already been struck by the hammer, such as by actively changing the amplitude of a ...
