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Пікірлер: 14
@ED-ix6mq2 жыл бұрын
Very good explanation, thank you!
@jihopark102010 ай бұрын
Thank you so much
@_LusitaSimbolonАй бұрын
thank you, very good video!
@IRANIGUY14 күн бұрын
in FRF plots @4:00 : the vertical axes do not appear to be correct. The Imag axis should be Flipped in the lower phase diagram.
@BasitKhan-te4ls21 күн бұрын
I want to find the damping ratio of a helical spring using this method: 1. Attach an accelerometer at the top of the spring. 2. Disturb the spring by hand to generate a time vs. frequency graph. 3. Convert this time vs. frequency graph to an FFT to see the frequency vs. amplitude graph. 4. Find the damping ratio using the half-bandwidth method on the FFT. My questions are: a. Is this the right method to find the damping ratio, or is the FRF necessary to include the force with hammer impact? b. What if I use or don't use an impact hammer as in this video?
@dawonpark32683 жыл бұрын
well helped
@Lethgar_Smith Жыл бұрын
Altering the resonate frequency of an object is the key to an entirely new era of human technology.
@jjxie32912 жыл бұрын
Hello, among the three elements of frequency, damping and vibration mode obtained in modal analysis, does damping refer to "damping factor" or "damping ratio"? Is it the latter? Thank you and look forward to your reply
@SimcenterTesting
2 жыл бұрын
Damping factor and damping ratio are just different ways of describing the same thing. See this article for more info and how the different forms are related (in Section 2). community.sw.siemens.com/s/article/how-to-calculate-damping-from-a-frf
@jjxie3291
2 жыл бұрын
@@SimcenterTesting Thank you. I will continue to study the linked articles
@toddr5732 Жыл бұрын
Where is the powerpoint plug in they mentioned ? Any link to download it ?
Пікірлер: 14
Very good explanation, thank you!
Thank you so much
thank you, very good video!
in FRF plots @4:00 : the vertical axes do not appear to be correct. The Imag axis should be Flipped in the lower phase diagram.
I want to find the damping ratio of a helical spring using this method: 1. Attach an accelerometer at the top of the spring. 2. Disturb the spring by hand to generate a time vs. frequency graph. 3. Convert this time vs. frequency graph to an FFT to see the frequency vs. amplitude graph. 4. Find the damping ratio using the half-bandwidth method on the FFT. My questions are: a. Is this the right method to find the damping ratio, or is the FRF necessary to include the force with hammer impact? b. What if I use or don't use an impact hammer as in this video?
well helped
Altering the resonate frequency of an object is the key to an entirely new era of human technology.
Hello, among the three elements of frequency, damping and vibration mode obtained in modal analysis, does damping refer to "damping factor" or "damping ratio"? Is it the latter? Thank you and look forward to your reply
@SimcenterTesting
2 жыл бұрын
Damping factor and damping ratio are just different ways of describing the same thing. See this article for more info and how the different forms are related (in Section 2). community.sw.siemens.com/s/article/how-to-calculate-damping-from-a-frf
@jjxie3291
2 жыл бұрын
@@SimcenterTesting Thank you. I will continue to study the linked articles
Where is the powerpoint plug in they mentioned ? Any link to download it ?
@SimcenterTesting
Жыл бұрын
community.sw.siemens.com/s/article/active-pictures-plug-ins-for-simcenter-available
At 5:04 isn't the left spring system supposed to dampen over time?
@SimcenterTesting
Жыл бұрын
This is a theoretical example where the left mass-spring system does not have any damping (c). As a result, it does not dampen over time.