Hydrodynamic Analysis Of Bionic Propulsion Mechanical

Since more and more attention paid to the marine environmental protection andmarine resource exploitation, a variety of unmanned marine robots have been widelyused in many fields such as marine science expedition, marine engineering, marineaquaculture and so on. The remote-controlled robots and Autonomous UnderwaterVehicles (AUV) are the most common types of underwater robots. However, the twotypes of robot’s propulsive power was propeller, so there are many disadvantages suchas low energy efficiency, poor mobility, poor hovering ability, considerable vibrationand acoustic noise in these two types of robots. The problem that unmanned oceanobserver is lack of enegy for a long time can be solved by bionic propulsionmechanism drived by waves directly, which has the advantages of low-carbon, nopollution and no noise. So the unmanned ocean observer can sail and observe for longtime on the big seas. The enegy of bionic promoting motion can be provided byreciprocating and heaving motion of wave to avoid the loss of energy.The two devices, a kind of propulsion device imitating ducks’ flippers and a kindof propulsion device drived by wave power directly, were studied in the research.Based on movement form and movement pattern of both, a water dynamics analysissoftware (Fluent) was used to analyze the hydrodynamic problem for both devices.And the contents about the research mainly include three parts, which were thehydrodynamic analysis about propulsion device imitating ducks’ flippers, thepropulsion device drived by reciprocating and heaving motion of wave and thehydrodynamic simulation about underwater propulsive mechanism of motor buoy.Ducks’ sports and flippers structural characteristics in the water were analyzed indetails. Based on the principle of bionics, a new type of underwater robot wasdesigned, which could imitate ducks’ movement form. Furthermore, a new propulsiondevice simulated the ducks’ web was designed, which was driven by the wavesdirectly. Meanwhile, a kind of software (Matlab) was used to analyze the simplifiedvibratory model and influence to system about the design parameters.Since the motor buoy driven by the wave directly was made in the laboratory, thehydrodynamics simulation was analyzed to get the overall driving force, acceleration,velocity and other parameters when they were under the action of waves. At last,compared with the experimental data, the feasibility of institutions was demonstrated.