Name : PyNAT.exe Size : 63.5 MB Language : Python Libraries used : NumPy, Matlibplot and SciPy Packaged using : Pyinstaller Paradigm : Object Oriented Model Platform : Developed for Windows 10, Needs re compilation of source code to work cross platfom, Stand alone application

PyNAT is a Python based Naval Architecture tool written to compute

Hydro-statics at even keel and and at given trim angles
Cross curves of stability (KN Curves)
GZ curves at a given Load Cases (i.e., Mass and VCG)

The following hull forms can be analysed,

Only Mono Hulls with port / starboard symmetry
Hull form must be definable using station curves along the length
Hull forms with chines and knuckles
Hull forms with discontinuous curves (near bow and stern)

No installation is required to use this CUI application. The application comes as an executable program, that only reads, computes and writes data to its parent directory.

A preliminary validation showed reasonable accuracy. A more in depth validation is to be performed.

The Script is written in object oriented paradigm. One can experiment with the script and improve the speed and accuracy. Typical parameters that one can experiment with,

The fit type / interpolation techniques
Order of curve fitting / interpolation
Spline smoothing
Integration techniques
Extending to perform advanced calculations
Consider advanced hull forms like catamarans

Link: https://github.com/praveen-kch/Py-NAT

The GitHuB Repository contains the following :

The Python Source Scripts
The Application "PyNAT.exe"
User Guide
Demo video links
Test Cases for KVLCC2 and CAD/Excel templates to help prepare the input files

-Praveen Kumar Ch praveench1888@gmail.com