ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
101
|
Sat Sep 5 15:17:41 2015 |
rana | General | Configuration | FEA logs merged | I moved the only entry from the 'ENG_FEA'
log into the COMSOL log and then renamed
that logbook as 'FEA' since we don't |
|
|
102
|
Fri Dec 4 18:32:02 2015 |
rana | General | Configuration | COMSOL: remote server w/ matlab | This summarizes how to get the remote comsol
server to run. COMSOL 5.1.0.234 is now on
tegmeni thanks to Larry. |
|
|
105
|
Tue Jun 28 15:50:45 2016 |
Joy Westland | Mechanics | Analysis | A Simple Model of the Modal Analysis of a Cantilever Circular/Cylinder Cross Section in ANSYS tutorial | Here is a tutorial to implement a simple
Modal Analysis of a Cantilever Cylinder
1. Open the ANSYS workbench |
|
|
106
|
Tue Jun 28 16:54:23 2016 |
Nikhil Mathur | Mechanics | Analysis | Ansys 14.5 Indroductory Tutorial: Modal Frequency Convergence | This tutorial will go through how to show
frequency convergence for a cylindrical cantilever
using Ansys 14.5 and Mathematica. |
|
|
107
|
Wed Jun 29 14:14:44 2016 |
Joy Westland | Mechanics | Analysis | ANSYS Tutorials with Basic Meshing | Here are a series of tutorials for basic
meshing principles from ANSYS Meshing Basics:
ANSYS Meshing Fine Mesh |
|
|
108
|
Fri Jul 29 14:33:41 2016 |
Joy Westland | Mechanics | General | A Tutorial in Importing SolidWorks Files and Applying a Gaussian Force in ANSYS for a LIGO Test Mass | Here is a tutorial in importing SolidWorks
into ANSYS and the steps needed to apply
a Gaussian Force to the LIGO test mass that’s |
|
|
109
|
Sun May 7 18:22:35 2017 |
rana | General | Voyager | Voyager ITM: Radiative cooling with cold shield and cold CP | I took
Aidan's COMSOL model for the ITM from |
|
|
110
|
Mon Jul 24 15:35:34 2017 |
Mariia | General | Configuration | Running Comsol to Matlab | WIth Gautam's help, I have created
a user directory in 40 meter Lab and
copied Rana's documents (MATLAB |
|
|
111
|
Mon Jul 24 15:54:26 2017 |
Koji | General | Configuration | Running Comsol to Matlab | The number of licenses already used by
whom / still remains can be confirmed by
running the following command on a comsol-installed |
|
|
112
|
Wed Jul 26 20:14:46 2017 |
rana | General | Configuration | Running Comsol to Matlab | I've just tried this out on my desktop
machine using COMSOL 5.1 and its still working.
Which COMSOL is installed on optimus at the |
|
|
113
|
Fri Jul 28 15:48:58 2017 |
Mariia | General | Configuration | Comsol batch for windows | Using the written path from elog by
ericq: Computer
Scripts/Programs, Comsol can be run from |
|
|
114
|
Mon Jul 31 22:18:57 2017 |
rana | General | General | using more than 12 cores in matlab | Since
2014, the limit of 12 workers using the matlab
parallel computing toolbox has been lifted. |
|
|
115
|
Thu Nov 2 17:23:56 2017 |
Aaron | Mechanics | PonderSqueeze | Modelling suspension noise | aLIGO Suspensions Toy Model
On
Wednesday I started making my own model
of the aLIGO suspensions, with the top of |
|
|
116
|
Fri Nov 3 15:03:10 2017 |
Aaron | Mechanics | PonderSqueeze | Modelling suspension noise | Model Geometry
Test
Mass
I found the dimension
of the test mass flat in the drawings of |
|
|
117
|
Wed Nov 15 14:05:12 2017 |
Aaron | Mechanics | PonderSqueeze | Modelling suspension noise | Model Geometry
I
pared down the number of parameters in the
model to only the necessary ones. These are |
|
|
118
|
Mon Dec 4 16:27:13 2017 |
aaron | Mechanics | PonderSqueeze | | Meshing Surface Layers
Defining
New Selections
I don't know
why I wasn't seeing this problem with |
|
|
119
|
Mon Dec 4 17:42:53 2017 |
gautam | Mechanics | PonderSqueeze | FEA on optimus | We could run the simulations on the 32
core machine in the 40m lab (optimus)? I
think Mariia was running some of her studies |
|
|
120
|
Mon Dec 4 19:49:32 2017 |
gautam | Mechanics | PonderSqueeze | FEA on optimus | It's a good idea, I'll check out
her elogs and get it started tonight.
I found that I had the relative |
|
|
121
|
Tue Dec 5 10:50:54 2017 |
aaron | Mechanics | PonderSqueeze | FEA on optimus | I had some trouble running this on optimus.
Optimus has COMSOL 5.1 installed,
but I made these files in 5.3. I downloaded |
|
|
122
|
Tue Dec 5 19:50:47 2017 |
aaron | Mechanics | PonderSqueeze | FEA on optimus | Gautam advised me against trying to install
version 5.3, lest it break version 5.1--I
had already gone through the install, but |
|
|
123
|
Tue Dec 12 11:50:12 2017 |
aaron | Mechanics | PonderSqueeze | FEA on optimus | Simulation results
First
run
Gautam ran the
COMSOL model on sandbox1 since we were trying |
|
|
124
|
Thu Jan 18 21:13:59 2018 |
aaron | Optics | PonderSqueeze | modifications to Gautam's 40m finesse model | I made a copy of Gautam's 40m model
to add the unstable filter cavity for
the ponderomotive squeezing project. I wanted |
|
|
125
|
Mon Jan 22 21:13:25 2018 |
aaron | Mechanics | PonderSqueeze | tips from Shoaib | I talked with Shoaib about some changes
I could make to the FEA model to improve
convergence and reduce memory usage. Summary: |
|
|
126
|
Mon Jan 29 23:02:13 2018 |
aaron | Mechanics | PonderSqueeze | tips from Shoaib | I started implemented some of these changes:
Started the mesh with a
boundary free quad mesh on the interface |
|
|
127
|
Sat Mar 17 15:27:48 2018 |
rana | General | General | file size >> small | When saving your COMSOL files do these
two things to make the files much smaller
(good for saving in version control and sharing): |
|
|
128
|
Mon Aug 20 15:44:56 2018 |
rana | General | General | file size >> small | Also,
click 'Clear Mesh'
under the mesh menu
'Clear |
|
|
129
|
Sun Aug 26 16:42:54 2018 |
rana | Mechanics | Analysis | Test Mass Thermal Noise: Consistency Checks | For the Voyager test masses, we have been
considering a barrel coating to increase
the IR emissivity to increase the radiative |
|
|
130
|
Sun Aug 26 19:21:27 2018 |
rana | General | Voyager | Voyager ITM: Radiative cooling with cold shield and cold CP | this is a time dependent model of the previous
steady-state one
Cold Shield and CP held |
|
|
131
|
Thu Feb 14 12:38:51 2019 |
Ching Pin | Mechanics | | comsol modelling | So I did a simple comsol model of laser
heating of a silicon disk, with only radiation,
to see the temperature variation at steady |
|
|
132
|
Fri Feb 15 21:05:31 2019 |
Ching Pin | Mechanics | | comsol modelling |
So I got the time dependence to
work, but I'm not sure what went wrong |
|
|
133
|
Tue Feb 19 19:52:53 2019 |
Ching Pin | Mechanics | | comsol modelling | The time step response to heating via laser
(22.5 mW) is given in the attached picture,
for 2 starting temperatures, 122.5 K and |
|
|
134
|
Fri Mar 1 19:33:40 2019 |
Ching Pin | Mechanics | | comsol modelling | I've changed the heating to be from
two heat sources, to better model the situation
with a heater and a laser. The heater deposits |
|
|
135
|
Mon Mar 4 17:22:07 2019 |
Ching Pin | Mechanics | | comsol modelling | I've updated the material properties
to vary with temperature, mainly in the range
of 90-140 K. Using the parametric sweep function |
|
|
136
|
Wed Mar 6 09:51:18 2019 |
Ching Pin | Mechanics | | comsol modelling | So I tried adding the sapphire lens to
the comsol model, and I am having teething
issues. I can't seem to get the solver |
|
|
137
|
Thu Mar 7 10:10:37 2019 |
Ching Pin | Mechanics | | comsol modelling | There are no issues with the thermal side
of the modeling, the issue seems to be with
the structural mechanics side. I'm not |
|
|
138
|
Tue May 12 14:16:28 2020 |
Koji | General | General | FEA tutorial resources | cf. Forwarded email from Stephen
1) Tuesday Demo - Basics of FEA
Meshing G2000696 |
|
|
139
|
Tue Aug 11 11:16:29 2020 |
aaron | General | Configuration | COMSOL with Matlab without display | When running comsol with matlab interface
on sandbox1, it is usually most convenient
to ssh with screen forwarding (eg '-CY') |
|
|
140
|
Tue Aug 11 16:35:07 2020 |
aaron | General | Configuration | COMSOL: remote server w/ matlab | To run COMSOL on sandbox1 with no
graphical Interface, here are the
steps that worked for me (Tue Aug 11 16:35:51 |
|
|
141
|
Thu Jun 22 14:12:04 2023 |
Raj | General | aLIGO | Finesse Modelling for aLIGO | The aLIGO model available on IFOSim uses
the first surface of the mirror as Port 1
and the other surface as Port 2. This requires |
|
|
142
|
Thu Jul 6 11:35:55 2023 |
Rajashik | General | General | Basic Demonstration of Cavity Scan | Attached are plots of how HOMs are introduced
by defects in the mirror. This is just an
example for a basic FP Cavity. |
|
|
143
|
Fri Jul 21 16:42:57 2023 |
Rajashik | Optics | Analysis | | Initially, ideal conditions were considered,
without any deformations or thermal heating
effects in the mirrors. This offered a baseline |
|
|
144
|
Sat Jul 29 00:19:02 2023 |
Rajashik | Optics | General | | I have coded a rudimentary triangular model
using parameters provided by Aaron. In this
model, I have kept a simple PDH signal which |
|