Rank: 930 based on 123 downloads (last 30 days) and 2 files submitted
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Hossein Rahami

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Engineering Optimization Research Group (EORG) - Faculty of Engineering - Tehran University - IRAN

Professional Interests:
Structural Mechanics , Optimization , Evolutionary Algorithms , Graph Theory

 

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Files Posted by Hossein View all
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18 Mar 2010 Screenshot Matrix Structural Analysis A simple function for the analysis of two- and three- dimensional frame structures Author: Hossein Rahami analysis, structure, truss, frame, planar truss, space truss 53 5
  • 5.0
5.0 | 7 ratings
13 Apr 2007 Screenshot Truss Analysis A very simple M-file for analysis of any truss Author: Hossein Rahami mechanical modeling, structure, truss, analysis, finite element, fem 70 12
  • 4.4
4.4 | 15 ratings
Comments and Ratings on Hossein's Files View all
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21 Oct 2013 Matrix Structural Analysis A simple function for the analysis of two- and three- dimensional frame structures Author: Hossein Rahami Masood

من دو روزه کل اینترنت رو زیر و رو کردم و انواع توابع و اسکرپیت های ماتریس سختی رو دیدم ، واقعا این چیزی که شما نوشتید یه چیز دیگه است .
و البته حالا که متوجه شدم شما ایرانی هستید اصلا یه جور دیگه واسه ام لذت بخشه .
آفرین .
ممنون از اشتراک این فایل

12 Mar 2013 Matrix Structural Analysis A simple function for the analysis of two- and three- dimensional frame structures Author: Hossein Rahami Kayton, Dean

Do you use SI units? Else what are the units? Thanks

11 Dec 2012 Truss Analysis A very simple M-file for analysis of any truss Author: Hossein Rahami Jobes, Chris

Very concise code, a bit hard to understand for a novice without a lot of work, but pretty straight forward for those of us in the field. I decided to compare it to a MATLAB script that I wrote based upon Moaveni's book many years ago. It was not nearly as concise, but much more understandable.

I do have an issue with the ST.m code, however. There appears to be an error that only appears if a load is applied to a node that has constrained movement in that direction.

A quick check of the applied loads and reaction force sums should yield 0 in the x and y directions. In one of my test scripts, it did not. The test was a roof truss with snow load concentrations applied at the upper nodes. Two of those nodes had vertical constraints where the truss rested on the wall top plates and the reaction forces I calculated using this script were incorrect.

The fix is easily made and only appears in an odd case. Line 9 should be:

R=reshape(S*U(:),w)-D.Load;R(f)=0;

since R=KU-F. I have not yet tested your MSA code, but at a glance, it appears to have the same issue.

Otherwise, great job.

31 Oct 2012 Truss Analysis A very simple M-file for analysis of any truss Author: Hossein Rahami mu, tong

06 Sep 2012 Truss Analysis A very simple M-file for analysis of any truss Author: Hossein Rahami McHugh, Frank

For the convience of those who found this code to obtuse, I've uploaded a copy with the ST function reformatted and extensive comments added at
http://www.mathworks.com/matlabcentral/fileexchange/38044
No actual code changes but should be easier to understand, and have confidence in this code

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