[SciPy-user] Use of Scipy in a students final year mechanical engineering project.

William Hunter willemjagter at gmail.com
Mon Aug 7 09:10:13 CDT 2006


Another thought(s). Something you're likely to come across if you end
up in the mechanical design field, is the use of codes...

Why don't you write a program that can calculate the dimensions of a
pressure vessel, according to ASME, for example? Or a gear design
program which will output the 3D gear? A program to design offshore
containers to DNV's CN 2.7-1?

Go look at some of the add-ins available for programs like SolidWorks
and Solid Edge, you might find some ideas here too.

For programs like these the user (probably yourself one day) would
typically want an intuitive UI, some form of customisation, be it by
editing a text file with material spec's or a file specifying pipe
and/or flange dimensions, and DEFINITELY output in the form of a CAD
file (I would say DXF/IGES for 2D and StL/XML/VRML for 3D. You can
attempt Parasolid, ACIS or STEP, but these are not as simple as StL
and last mentioned is in wide use by the rapid prototyping industry).
One would possibly also want to view (matplotlib) the pressure vessel
before saving it as a DXF file for instance. Maybe add an option to
enter "Company and Project Details" when saving the file as a DXF...
There's a lot of options!

Regards,
William

On 07/08/06, John Hassler <hasslerjc at adelphia.net> wrote:
>
> You've gotten a lot of very good responses already.  I'd just make a couple
> of comments.
>
> I'm a former prof. of ChE (retired).  When I started out (a long time ago),
> industrial plants were built in several stages: beaker, bucket, barrel,
> (maybe more), final plant.  You would start with bench-scale experiments in
> the laboratory, and work through progressively larger "pilot plants" until
> you were confident that you understood the process well enough to commit to
> building the full-scale plant.  Now, design is done through computer
> modeling and simulation, and pilot plants are rarely, if ever, used.  The
> same is true in all fields of engineering.  For example, computer chips are
> simulated in detail before being tried "in silicon."
>
> In spite of this, most engineers never learn to program at any level beyond
> the most basic.  I'm not familiar with your field, but in ChE, there are
> "black box" programs (Aspen, ChemCad) which will do very sophisticated
> modeling, without requiring much knowledge on the part of the operator.  I
> think this is unfortunate ... but then, I'm old fashioned.
>
> I'm a visiting prof. here at VaTech.  The engineering college has
> standardized on Matlab.  I don't like it much, for two reasons.  First, it's
> outrageously expensive.  (Scilab, as an example, is free, similar to Matlab
> in basic capabilities, works under both Windows and Linux, and is certainly
> sufficient for any but the most demanding computational problems.)  Second,
> Matlab makes it difficult to write well-structured programs of any
> appreciable size.  Python-Scipy, on the other hand, is a "real" programming
> language, which can handle VERY large programs with "grace and beauty," and
> can do small programs with convenience.  The "immediate" calculational
> abilities (IDLE) are more convenient than those of Matlab, since you can
> define functions "on the fly" ... Matlab requires "m-files" for functions
> ... and I've used Python plus Numeric to solve some reasonably large FEM
> examples in acceptable times.
>
> So if you needed any more encouragement to look into a modeling problem with
> Python, perhaps this will help.
>
> (As I re-read what I've written, I guess I could have just said, "Computing
> .. important.  Python... good."  Professors are long winded ..... )
>
> john
>
>
>
> Stephen Kelly wrote:
>
>
> Hi,
>
> I sent this email to Eric Jones, but he recommended that I send it to this
> mailing list instead. I'm trying to see if scipy could fit into a final year
> project for my mechanical engineering course.
>
> I am a student of mechanical engineering in UCD Dublin , and part of my
> course involves doing a final year project. We do very little programming in
> my course, but as coding and python in particular is something that
> interests me, I'd like to have some involvement in python in my final year
> project.
>
> Because my course is not centered around coding, I think I'd be more likely
> to be able to do a project on applying a python application like scipy to a
> problem, or using python as glue in a scripting applicatin. I found scipy
> while searching for an idea for a project that I could do in python, while
> staying within the scope of mechanical engineering and my course. I'm still
> no closer to an idea, so I thought I'd write to you to see if you had any
> ideas of what I might be able to do as a mechanical engineer with
> python/scipy.
>
> Something that I think might be plausible might be a simulation or
> computational analysis of some kind, but I would probably need to justify
> using python for whatever I do rather than MatLab, which is the industry
> standard, and the program that my lecturers are already familiar with. I
> have never used MatLab myself, so I'm not sure what it offers.
>
> I would appreciate any thoughts you might have on this. I emailed one of my
> lecturers already, who asked me for more specific details and to give
> thought to the type of project I would like to do.
>
> Kind Regards,
>
> Stephen Kelly
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>
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-- 
Regards,
WH


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