A procedure for the optimization of a catamaran’s sail plan able to provide preliminary optimal appendages configuration is described. The method integrates parametric CAD model, an automatic computational domain generator and Velocity Prediction Program (VPP) based on combination RANS computations analytical models. sailing speed course angle are obtained, with iterative process, solving force...

This research explores the solitary wave solutions, including dynamic transitions for a fractional low-pass electrical transmission (LPET) line model. The fractional-order (FO) LPET mathematical system has yet to be published, and neither it been addressed via extended direct algebraic technique. A computer program is utilized validate all of incoming solutions. To illustrate dynamical pattern ...

Submarine permafrost is widely distributed in polar ocean, which has an important impact on engineering and subsea energy exploitation. According to the frozen porous medium theory, analytical solution of one-dimensional vertically dynamic response submarine derived by using Laplace transform separation variable method. Using general forms partial differential equations pressure acoustics modul...

In the present research, free vibration and modal stress analyses of thin circular plates with arbitrary edge conditions, resting on two-parameter elastic foundations are investigated.  Both Pasternak and Winkler parameters are adopted to model the elastic foundation. The differential transform method (DTM) is used to solve the eigenvalue equation yielding the natural frequencies and mode shape...

the available shear correction factors have mainly been developed for homogeneous isotropic plates and/or assuming that no shear tractions are imposed on the top and bottom surfaces of the plate. in the present research, a more general case of a circular functionally graded plate subjected to non-uniform normal and shear tractions at the top and bottom surfaces is considered. these non-uniform ...

in design of defense structures, concrete are often used to provide protection against incidental dynamic loadings such as the impact of a steel projectile. in the present study, a new analytical model is proposed to predict penetration depth into concrete targets by ogive nose projectile. hence, to ­ develop the model and simulate penetration of high velocity ogive-shape nose steel projectiles...