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VIS (OMM)

satoru.takano - 1:10 Wednesday 07 August 2024 (30740)

Simulation of OMC stack with fixing

As requested in the lase ISC meeting, I simulated the resonant mode of one of OMC stack leg with fixing some of them. I simulated three cases:

All of thee stages are fixed
The bottom and the middle stages are fixed, the top stage is free
The middle and the top stages are fixed, the bottom stage is free

In the following posts I will show the results of each case.

Please note that with the software I used for these simulations (Autodesk Fusion) it is impossible to simulate the frequency response of the displacement. To do so we need different software, such as COMSOL, ANSYS, etc. I already prepared one of them (Autodesk Inventor Nastran), but it will take long time because I have to learn how to use them and I'm just busy.

Comments to this report:

satoru.takano - 1:23 Wednesday 07 August 2024 (30741)

Case1: all of the stages are fixed

No.	Frequency [Hz]	Shape
1	3.50	Common X
2	3.51	Common Y
3	4.381	Common RZ
4	13.428	Common RY
5	13.502	Common RX
6	38.382	Common Z

Images attached to this comment

satoru.takano - 1:29 Wednesday 07 August 2024 (30742)

Case2: the bottom and the middle stages are fixed

No.	Frequency [Hz]	Shape
1	2.971	Common X
2	2.978	Common Y
3	3.803	Common RZ
4	9.72	Differential X?
5	9.735	Differential Y?
6	11.418	Differential RZ
7	18.29	Common RY?
8	18.344	Common RX?
9	31.531	Common Z
10	63.557	Differential RY?
11	63.971	Differential RX?
12	98.154	Differential Z

Images attached to this comment

satoru.takano - 1:36 Wednesday 07 August 2024 (30743)

Case3: the middle and the top stages are fixed

No.	Frequency [Hz]	Shape
1	2.708	Common X
2	2.714	Common Y
3	3.444	Common RZ
4	10.472	Common RY?
5	10.498	Common RX?
6	14.58	Differential RZ
7	17.208	Differential X?
8	17.217	Differential Y?
9	29.12	Common Z
10	110.618	Differential RY
11	111.256	Differential RX
12	131.803	Differential Z

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