| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
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51
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Tue Jul 9 14:45:04 2013 |
Emory Brown | Optics | General | Meshing error when varying geometry | I tried removing the constraints and applied
force and was able to get close to the same
frequencies for the butterfly modes as the |
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52
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Wed Jul 10 14:15:20 2013 |
Emory Brown | Optics | General | Comparison of Umax and the frequency of the lowest eigenmode against ratioR | I was able to run the looper program
designed last week over the interval ratioR=[0.5,
0.9] with a step size of 0.01 and obtained |
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53
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Wed Jul 10 17:52:18 2013 |
Koji | General | General | How to force time steps for a time dependent simulation | A common trap in COMSOL:
When you run a time series simulation,
COMSOL tries to be "clever" by |
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54
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Thu Jul 11 19:16:12 2013 |
Deep Chatterjee | General | General | TE noise problem - Matlab script | The present aim is the calculation of the
TE noise like Liu and Thorne. Although, the
results of Liu and Thorne are for the case |
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55
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Fri Jul 12 00:09:17 2013 |
Emory Brown | Optics | General | Analysis of substrate Brownian noise in a silicon test mass with changing ratioR value | I performed the same analysis we
previously did on a test mass made of silicon
(using the built-in silicon within COMSOL) |
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56
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Fri Jul 12 00:31:11 2013 |
Emory Brown | Optics | General | Reversed face mirror design | We had noticed that when we ran an
eigenfrequency analysis, there was often
a node (see attached screenshot) on the face |
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57
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Fri Jul 12 19:43:32 2013 |
Deep Chatterjee | General | General | TE noise problem - Matlab script |
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58
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Sun Jul 14 15:13:46 2013 |
Deep Chatterjee | General | General | TE noise problem - Matlab script |
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59
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Mon Jul 15 13:14:30 2013 |
Emory Brown | Optics | General | Umax curves for varying height test masses | I ran sweeps over the ratioR range
from 0.5 to 0.9 for test masses with modified
height, and thus mass, which were otherwise |
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60
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Mon Jul 15 16:05:29 2013 |
Deep Chatterjee | General | General | TE noise problem - Matlab script |
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61
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Tue Jul 23 18:26:04 2013 |
Deep Chatterjee | Optics | General | Comparison between Liu and Thorne Results and COMSOL results for TE noise | In this post I report of the results of
TE noise simulated by COMSOL for the TE noise
of Infinite test masses. |
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67
|
Tue Jul 23 20:53:37 2013 |
Deep Chatterjee | Optics | General | Comparison between Liu and Thorne Results and COMSOL results for TE noise |
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66
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Tue Jul 23 20:53:37 2013 |
Deep Chatterjee | Optics | General | Comparison between Liu and Thorne Results and COMSOL results for TE noise |
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65
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Tue Jul 23 20:53:37 2013 |
Deep Chatterjee | Optics | General | Comparison between Liu and Thorne Results and COMSOL results for TE noise |
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64
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Tue Jul 23 20:53:37 2013 |
Deep Chatterjee | Optics | General | Comparison between Liu and Thorne Results and COMSOL results for TE noise |
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63
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Tue Jul 23 20:53:37 2013 |
Deep Chatterjee | Optics | General | Comparison between Liu and Thorne Results and COMSOL results for TE noise |
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62
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Tue Jul 23 20:53:37 2013 |
Deep Chatterjee | Optics | General | Comparison between Liu and Thorne Results and COMSOL results for TE noise |
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68
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Tue Jul 23 20:53:45 2013 |
Deep Chatterjee | Optics | General | Comparison between Liu and Thorne Results and COMSOL results for TE noise |
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69
|
Wed Jul 24 21:08:24 2013 |
Deep Chatterjee | Optics | General | TR results for different dimensions | In this post I simulate the procedure of
calculating the TR noise for finite cavities
as proposed by Heinert and check for a |
|
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70
|
Thu Jul 25 11:36:17 2013 |
rana | Optics | General | TR results for different dimensions |
PDF |
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71
|
Thu Jul 25 13:21:46 2013 |
Deep Chatterjee | Optics | General | TR results for different dimensions |
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72
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Thu Jul 25 15:54:58 2013 |
Deep Chatterjee | Optics | General | TR results for different dimensions |
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73
|
Mon Jul 29 22:42:57 2013 |
Deep Chatterjee | Optics | General | Avoiding transient solutions in the Computation of TE/TR noise | An error was being encountered in the computation
of the TR noise lately. It was observed that
while running the simulations in the case |
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74
|
Wed Jul 31 15:39:11 2013 |
Deep Chatterjee | Optics | General | First try with paramter optimization for TE and TR noise profiles | After the simulations have been found to
match to a fair extent with the analytic
results by Heinert and Liu and Thorne, the |
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75
|
Thu Aug 8 17:17:19 2013 |
Deep Chatterjee | Optics | General | Something like cancellation | For the material parameters of Sapphire
at 300K, the TE and TR Noise profiles, though
not very close, lie close to within an order |
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76
|
Mon Sep 16 10:07:32 2013 |
Evan | General | Configuration | COMSOL 4.3 on the OS X command line | If you're running Matlab scripts that iterate
over simulation parameters (à la Tara), |
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77
|
Wed Nov 13 23:55:44 2013 |
Chris Couste | Optics | Analysis | Optical Mount Vibrational Analysis | Project: Vibrational Analysis of Optical
Mounts
Goal: Use COMSOL to run finite element |
|
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78
|
Mon Nov 18 15:56:59 2013 |
Chris Couste | Optics | Analysis | Representative Models | The simpler models of the optical mounts
are finished, they will be run through the
comsol analysis software soon. |
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79
|
Fri Nov 22 21:04:53 2013 |
Chris Couste | Optics | Analysis | analysis | The analysis is making nice eigenmode
and stress mode models, but the displacement
experiment needs work. Should be fixed by |
|
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80
|
Fri Jan 24 17:26:38 2014 |
Chris Cousté | Optics | Analysis | Mount Analysis Functional! | The comsol eigenmode analysis is
complete, and the only thing left to do on
this part of the project is to run the analysis |
|
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81
|
Sun Feb 16 21:10:56 2014 |
Chris Cousté | Optics | Analysis | Optical Mount data compilation 1: Aluminum | The time is finally here! this is
the highest displacement of each mount in
its lowest few eigenfrequencies, using 6061 |
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82
|
Thu Apr 17 16:52:09 2014 |
Evan | General | Characterization | Interpreting logfiles and picking a solver | Here are two entries by Walter Frei on
the Comsol blog that I've found useful.
Solving |
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83
|
Sun Jun 22 23:44:56 2014 |
Sam Moore | Optics | | Going through Heinert's 'TR noise of cylindrical test masses' paper | At this point, my are goals are to 1) convert
the time-dependent heat equation into stationary,
complex form, 2) use the Levin approach to |
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84
|
Mon Jun 23 11:40:17 2014 |
Sam Moore | Optics | | Going through Heinert's 'TR noise of cylindrical test masses' paper |
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85
|
Mon Jun 23 16:10:17 2014 |
Matt A. | Optics | | Going through Heinert's 'TR noise of cylindrical test masses' paper |
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86
|
Tue Jun 24 14:35:42 2014 |
Sam Moore | Optics | General | Trying to Verify the Heinert Model | |
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87
|
Tue Jun 24 17:05:24 2014 |
Sam Moore | Optics | General | Trying to Verify the Heinert Model | It does appear that the simplified
model is only relevant for the simulations.
To quote Heinert: "An efficient |
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88
|
Sat Jun 28 21:59:11 2014 |
Sam Moore | Optics | General | Difficulty with the COMSOL stationary module; Test Cases | Here, I describe some test cases
to see if COMSOL's solutions are agreeing
with some simple analytical solutions. Right |
|
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89
|
Sun Jun 29 15:37:18 2014 |
Sam Moore | Optics | General | Difficulty with the COMSOL stationary module; Test Cases |
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90
|
Sun Jun 29 20:25:44 2014 |
Koji | Optics | General | Difficulty with the COMSOL stationary module; Test Cases | What about this example? The result is
easier to understand intuitively.
Consider a bar with the length of |
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91
|
Sat Jul 5 13:04:32 2014 |
Sam Moore | Optics | | Heinert Model TR Noise Verification | Agreement with Heinert's paper for cylindrical
TR noise has now been achieved. Using
the stationary state assumption to calculate |
|
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92
|
Mon Jul 7 19:47:00 2014 |
Koji | Optics | | Heinert Model TR Noise Verification | How close are these FEA calculations with
the analytical values?
Can you plot residual too? (Put analytical |
|
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93
|
Thu Jul 10 16:51:14 2014 |
Sam Moore | Optics | General | Duan and Heinert Comparison | (See Plots in attached document)
My plan has been to replicate Duan's |
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94
|
Fri Jul 11 10:58:18 2014 |
not Koji | Optics | | Heinert Model TR Noise Verification |
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95
|
Mon Jul 14 19:09:14 2014 |
Sam Moore | Optics | General | Using Heinert's Solution for Duan's Parameters | I have plotted Heinert's analytical
solution for TR noise using Duan's parameters.
Since TO and TE noise can be found |
|
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96
|
Mon Jul 14 19:14:31 2014 |
Sam Moore | Optics | General | Duan and Heinert Comparison |
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97
|
Thu Jul 31 20:55:38 2014 |
Sam Moore | Optics | General | Finding the Right Meshing for the TIR cavity | In this document, I try to identify
I good mesh by comparing the numerical solution
from that mesh with my analytical model. |
|
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98
|
Sat Aug 2 00:22:34 2014 |
Sam Moore | Optics | General | Finding the Right Meshing for the TIR cavity |
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99
|
Tue Sep 30 11:30:27 2014 |
Nic, Dmass, Evan | General | Configuration | Gravity in Comsol | Here
is a set of slides by Yoichi Aso on how to
handle gravity in Comsol. |
|
|
100
|
Sat Sep 5 15:04:43 2015 |
Dennis Coyne | Mechanics | Configuration | summary of FEA modal model to State Space model | At the 2014 commissioning |
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