As a new kind of autonomous underwater vehicle, bionic submersible has many merits such as high efficiency and low costs. To simulate the shapes of marine animals and apply them to the design of artificial underwater vehicle is a good way to obtain such advantages. In this paper, an optimization system of airfoils is proposed by the improved Class function /Shape function Transformation (CST) parameterization method and genetic algorithm (GA). The appearance of a manta-ray-inspired underwater vehicle is rebuilt using the optimal sectional airfoils obtained by the proposed optimization system. Computational simulations are carried out to investigate the hydrodynamic performance of the submersible using the commercial Computational Fluid Dynamics (CFD) code Fluent. The results demonstrate that the maximum thickness of the vehicle increases by 9%, which means the loading capacity is increased. Moreover, the underwater vehicle shows better hydrodynamic performance, and the lift-drag ratio of initial design is increased by more than 10% using the presented optimization system of airfoils.
This document explains and demonstrates how to analyze the stress of the axle, modify the rear wing and SolidWorks dynamic simulation analysis for the F1 Race Car. It offers a variety of results visualization tools that allow investigators to gain valuable insight into the design of the F1 race car, and makes it easy to share analysis results effectively with everyone involved in the F1 race car product development process.
This document explains and demonstrates how to design the structure and analysis its strength for the underwater propulsion manipulator. Through comparison, the structural design program of the manipulator is determined, With the solidworks software, its strength is checked up, and the forces are analyzed by the dynamic simulation solidworks.
Currently, friction stir welding has had a wide application in connection of aircraft panels. However, researches are rarely carried on in domestic aeronautics field, which involves the differences between FSW panels and traditional riveted panels in aspects of strength and stabilities under various working conditions such as shear and tension and compression. Picture frame fixture was used in this research for comparison test between two types of aircraft panels, which were connected to stringers by riveting and friction stir welding (FSW). Finite element models were established to simulate the panels in the shear tests which proposed a method to simulate the connection types. It is found that the FSW connection performs better than riveted connection in aspects of limiting load and initial buckling load, which proved that panel connected by FSW is better than riveting in mechanical properties. The test result is proved by FEM simulation, and vise versa.
The automobile elevator sedan frame is composed of the main sedan and the vice-sedan frame. Main sedan with vice-sedan by respective putting up the uppert beam, the straight beam, the under beam to be composed separately, connection mode by bold fastening primarily. Using Solidwoks software to design the main components of a sedan modeling and the completion of the necessary mechanical calculation.
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