Ali Dehghanian - hypdro aerostatic Depl, -Air Naval Research Center- MT University -Shiraz
Kambiz Alempour - hypdro aerostatic Depl, -Air Naval Research Center- MT University -Shiraz
Hassan Kadivar - S۱ilRA.Z UfiTVERCITY-School of enailleering-Mechanic Dept

Amphibious1 701,er-a-afils Suppoi-ferdo tallj~b y its air cushion with a flexible skirt system arou~idir s Pcripliery to Seal the cushion air. '4 ir cusl7ion vehicle are generally ropelled byfiee or d7.1cteda propellers,obry ducted fans.Air duct increase the perjrol-r~ianceo f 1;eliicle Tl7iwst .The srr-uctural weight of hovercraft duct, is an ir77po1.tanr designpar.ar77eterjou tl-il~ai nd stability considerearion. In this article air duct sri-uctural 1vc.igl7t 0;1fiir7iration iz.as used for a real nod el of ducr by usir9g genetic algorirhin and tl;e loc~tiono frib a~:din ternalfiarne of duct have been derermincd by GA method.

Hovercraft , Air Dust , Structure ,Optimization , Genetic Algoritm