Is this a mechanical system of vibration reduction?

Question

Is this a mechanical system of vibration reduction?

Cris1 (Student)

(OP)

11 Mar 21 06:09

I found here Coupled oscillators, the last one on this page, a system named by the author "Vehicle Suspension System". But I am not sure this modelizes a suspension for a vehicle.

I am interested to find and describe appropiate physical phenomena modelized by mechanical systems of this type and any other bibliographical references would be of help. Is it somehow related to a vibration reduction system in civil engineering?

IRstuff (Aerospace) · Answer 1 · 2021-03-11 06:32:49

Why do you think otherwise? A passive spring system acts as a low pass filter, and therefore, reduces vibrations at frequencies above the resonant frequency

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GregLocock (Automotive) · Answer 2 · 2021-03-11 06:49:01

I must admit at first sight it is not clear what is being modelled.

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Cris1 (Student) · Answer 3 · 2021-03-11 06:49:47

Ok, so you think it can modelize a vehicle suspension?

IRstuff (Aerospace) · Answer 4 · 2021-03-11 06:55:24

What is your basis for disagreement with it? Your cited model is consistent with everyone else's models of suspensions.

https://www.iith.ac.in/~ashok/VD/GroupD_Suspension...
https://www.mathworks.com/help/simulink/slref/auto...
https://ctms.engin.umich.edu/CTMS/index.php?exampl...

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Cris1 (Student) · Answer 5 · 2021-03-11 06:56:46

I have studied the dynamics of this system and I am interested to describe physical phenomena which could be modelized by it.

Cris1 (Student) · Answer 6 · 2021-03-11 07:03:58

I'm confused about that horizontal wall at the top. If it is fixed and we discuss about a suspension of a vehicle, what could the horizontal wall actually represent? In this case, can the block m_1 be considered as the seat and m_2 as the wheel?

GregLocock (Automotive) · Answer 7 · 2021-03-11 10:18:47

I work with suspensions every day at work. it is not at all clear to me what is being modelled. If m1 is the unsprung mass and m2 is the sprung mass then k2 and d2 are 0.

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drawoh (Mechanical) · Answer 8 · 2021-03-11 22:30:58

Cris1,

Your figure makes no sense to me as an automobile suspension. Could it be an example of the dynamic damping they use on some tall buildings?

--
JHG

IRstuff (Aerospace) · Answer 9 · 2021-03-11 23:47:24

The cited website shows the model for quarter car suspension

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GregLocock (Automotive) · Answer 10 · 2021-03-12 00:01:37

Which doesn't have a k2, and has a moving foundation. The posted diagram was not a vehicle suspension in any normal fashion.

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Greg Locock

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Is this a mechanical system of vibration reduction?