Multi-body layout optimization of an unmanned quadramaran
To address the issue that navigational drag perform-ance of an unmanned quadramaran is affected by both longitu-dinal and lateral separations of multi-bodies,the entire layout of an self-designed unmanned quadramaran is optimized by comprehensively comparing drag coefficients of various schemes under different navigation conditions.Firstly,a vari-ety of layout schemes are constructed to compare and analyze calm-water resistance coefficients under three different speed conditions by using computational fluid dynamics numerical simulation methods and Fluent solver.Secondly,a compre-hensive resistance coefficient evaluation function is designed to optimize the layout scheme considering resistance perform-ance.Finally,the improvement effect of layout optimization on the overall navigation performance is further verified by com-paring the wave height and surface pressure before and after optimization.Simulation results show that the longitudinal dis-tance is the main factor affecting the overall navigation resist-ance of quadramaran,while the optimized layout of multi-bodies reduces the comprehensive resistance coefficient by 12.9%compared to that before optimization,thereby effec-tively reducing wave height and surface pressure of the un-manned quadramaran during navigation.
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