Michlet 8.06 Released

[Leo Lazauskas]

Michlet 8.06 is now available for free from:
http://www.cyberiad.net/michlet.htm.

Some minor modifications have been made in preparation for better
communication with Martijn van Engeland's program FREE!Ship.

* Maximum ship displacement has been increased to million tonnes.

* Maximum speed has been increased to 52.0 m/sec for no particular
reason, except that "Optimal, 100-knot, million tonne cat" sounds
cool.

* The method of calculating Michell P,Q functions in infinite
depth water has been improved. These functions are now exact for
hulls with piece-wise quadratic waterlines and piece-wise
quadratic sections, for example, parabolic struts and Wigley
hulls. For some optimisation problems that involve wave-making but
not skin friction, very few stations and waterlines are required
to represent the hull. The tet6.mlt tetrahull example that comes
with Michlet runs about 10 to 15 times faster with this
improvement.

* Updated skin friction line based on Grigson's Method. Changes
are fairly minor and will be only be apparent at low Reynolds
numbers, typically below about 2 million.

* Uncrippled the "Ship ID" objective function. GODZILLA can search
for a hull or arrangement of hulls that makes a user-specified
wave pattern. The program is limited to two longitudinal wave
cuts at present.

* Bottom pressure signature calculations uncrippled but still need
validation and checking.

Have fun!
Leo.

[dumbass]

As of 8.04, Michlet had four variants: Demo, Basic, Pro, and ProSig - since I didn't see any reference to them on the website, have all but one been dropped?

[Leo Lazauskas]

Originally Posted by dumbass

As of 8.04, Michlet had four variants: Demo, Basic, Pro, and ProSig - since I didn't see any reference to them on the website, have all but one been dropped?

Yes, there is just one version now. I gave up maintaining different versions and made it free. My life immediately became simpler.

Leo.

[yipster]

SUPERCOOL

[jam007]

What a program!!

The "Mostly minor modifications ... for better communication with ... FREE!Ship" sounds great for one that just has spent hours editing offset exports from FREE!Ship and turning them into Michlet input.
I would love to know more about the FREE!Ship - Michlet communication plans.

Anders M

[CGN]

You can model you hull in Freeship and export to michlet from Freeship, Freeship will create the in.mtl file so Michlet reads directly from it.

cheers

[Leo Lazauskas]

Originally Posted by jam007

What a program!!

The "Mostly minor modifications ... for better communication with ... FREE!Ship" sounds great for one that just has spent hours editing offset exports from FREE!Ship and turning them into Michlet input.
I would love to know more about the FREE!Ship - Michlet communication plans.

Anders M

It's a game of ping-pong at the moment. Martijn has coded up an export function that (as CGN mentioned in another post) creates an in.mlt file that Michlet can use. Once that version of Free!Ship is released I'll have a look at what more I can do to make the interaction easier. For example, I'm still trying to figure out how to build in a "design draft" parameter suggested many years ago by Tom Speer. The concept itself is not difficult, but it makes the optimisation routines a bit of a pain to program.

Also, the in.mlt file created by Free!Ship doesn't yet support GODZILLA. The first part of a GODZILLA file is just the standard in.mlt file but I still need to work out how to add the tail end part of the file, or at least make it easy for users themselves to include the optimisation section of the file.

Regards,
Leo.

[jam007]

Thanks!

Anders M