frns4ever
Mechanical
- Aug 20, 2007
- 7
Hello
I am doing modal analysis of a plate with bolted joint. I have done experiment on shaker vibrated the plate axially with random input for finding the frequency of the plate with a bolted joint. My topic is 'Self loosening of bolted joint under vibrations'. So i applied different torques and found the frequencies. But i didnt find any change in the frequency for change in the applied torque on the head of the bolt. Later on i tried in ANSYS. But still i could find any change in frequency.
Can anyone give me an idea in modeling the plate with bolted joint in ANSYS classic.
[I have done analysis like this. I have modeled a plate with a hole in the center using pro-e,and i modeled a washer(resembles nut and bolt resting on the plate) and assembled on the top and bottm of the plate in pro-e.Then i imported to ansys in igs format.I fixed the inner surface of plate hole in all difections.I applied torque(converted in terms of axial force in Ansys)on the top surface in downward direction and on the bottom washer in the upward direction.Then i i have done modal analysis.But i counld find the any change in frequency).
Can you please tell me whether i am doing right or wrong in order to correlate with the experiment or-else is there any other procedure to correlate between the experiment and ANSYS.
i am uploading the modal in igs format and also here are the link to the setup pics
sorry for the long post...
Thanks in advance
I am doing modal analysis of a plate with bolted joint. I have done experiment on shaker vibrated the plate axially with random input for finding the frequency of the plate with a bolted joint. My topic is 'Self loosening of bolted joint under vibrations'. So i applied different torques and found the frequencies. But i didnt find any change in the frequency for change in the applied torque on the head of the bolt. Later on i tried in ANSYS. But still i could find any change in frequency.
Can anyone give me an idea in modeling the plate with bolted joint in ANSYS classic.
[I have done analysis like this. I have modeled a plate with a hole in the center using pro-e,and i modeled a washer(resembles nut and bolt resting on the plate) and assembled on the top and bottm of the plate in pro-e.Then i imported to ansys in igs format.I fixed the inner surface of plate hole in all difections.I applied torque(converted in terms of axial force in Ansys)on the top surface in downward direction and on the bottom washer in the upward direction.Then i i have done modal analysis.But i counld find the any change in frequency).
Can you please tell me whether i am doing right or wrong in order to correlate with the experiment or-else is there any other procedure to correlate between the experiment and ANSYS.
i am uploading the modal in igs format and also here are the link to the setup pics
sorry for the long post...
Thanks in advance