Design of Vibration fixture
Design of Vibration fixture
(OP)
hi,
I am designing vibration fixture for an actuator , I want to find Natural frequency of fixture by theoretical calculations? vibration fixture should match 3000 HZ frequency.
Vibration fixture consist of below parts
• Base plate
• Steel female spline to connect output shaft
• 6 screws to mount Steel female spline with base plate
• 3 mounting bolt to mount actuator on the base plate
Thank you
Dipak
I am designing vibration fixture for an actuator , I want to find Natural frequency of fixture by theoretical calculations? vibration fixture should match 3000 HZ frequency.
Vibration fixture consist of below parts
• Base plate
• Steel female spline to connect output shaft
• 6 screws to mount Steel female spline with base plate
• 3 mounting bolt to mount actuator on the base plate
Thank you
Dipak





RE: Design of Vibration fixture
Not sure what you mean by that. the fixture should have a natural frequency WAY above the maximum test frequency. Test fixtures are supposed to transmit vibration energy from the tester without modifying it.
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RE: Design of Vibration fixture
If you're going to test at 3000Hz, you need a very stiff fixture.
Mike Halloran
Pembroke Pines, FL, USA
RE: Design of Vibration fixture
my basic requirement is "vibration fixture should match 3000 HZ frequency."
so how can we theoretically calculate natural frequency?
i have done the FEA analysis with few iterations however is there any formula to get natural frequency easily?
thank you
Dipak
RE: Design of Vibration fixture
In any case, I think the answer to your question is no; there is no simple way to calculate natural frequency of a complex structure.
https://www.wpi.edu/Pubs/E-project/Available/E-pro...
TTFN

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RE: Design of Vibration fixture
As noted, the test fixture natural frequency should be well above the test frequency. Running the test at the fixture natural frequency will quickly destroy the fixture.
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RE: Design of Vibration fixture
I have done FEA analysis to verify design.