| With ocean energy is used worldwhile, the turbine as a generator converted water into electrical energy, the hoisting operation is an important link to enter the water installation in the construction process of hydraulic turbine.and the hoisting operation almost accord to the experience of the people.These things will be directly related to the accuracy and security of the turbine, must be calculated by theory and simulation, obtains its movements and parameters, prediction, avoid and prevent the risk occurs, so that the whole project is economic and reliable. On the other hand, through calculation and simulation, and obtains all kinds of forces, its interaction and the motion parameters between the turbine and the water, then checks the strength of the turbine,it is convenient to optimize the structure of hydraulic turbine. And on this basis, based on the software Flow 3D and Lab Windows, develops the user interface, integrates the set of wind flow and other parameters and the output of turbine force, gesture and real-time sea in the same interface, forming a convenient, simple and intuitive simulation system.Based on the system dynamics, fluid mechanics, numerical calculation methods and software engineering as the foundation, based on research results at home and abroad, take full account of the motion characteristics of marine structures under the action of wind flow, the development of the turbine lifting into the water system has carried on the theoretical analysis, modeling, simulation and user interface is studied. The concrete research contents and conclusions are as follows:Firstly, based on the CFD software Flow3D,3D numerical wave flume model for simulation of hydraulic turbine lifting into the water process is built. By using VOF model for free surface tracking method, RNG k-εmodel for simulation of turbulent, has a good performance of the wave and the wave dissipation, can simulate the 3D wave propagation well.Then simulate the gesture of the turbine when lifting into the water. Before the simulation, on the three-dimensional motion system is analyzed and a three-dimensional model is established based on the marine turbine in our laboratory. And the 3D model is optimized, the conditions is selected for the simulation of gesture. Through the turbine gesture and coordinate data, turbine in different position, the swing posture of the turbine in different position were relatively stable, lifting accuracy is high, and there is no structural damage or construction safety hazards.Then simulate the stress of turbine and on the basis of it, check the strength of the hydraulic turbine. By analyzing the results obtained in this paper, the force of hydraulic turbine are coincided with actual situation, and the maximum stress of the turbine is less than the allowable stress, so to meet the engineering practice of strength and stiffness requirements.Finally, based on the software Lab Windows, using C language, develops the user interface. The set of all the parameters in the simulation process and the output of the results are integrated in the same interface, simple and intuitive, easy to operate.Through this research, we can simulate the gesture of the system, force of turbine or other offshore structures in the offshore installation work and other parameters and show the result visual and clear.it not only provide the scientific basis for making decision, made the sea engineering more safe and reliable, but reduce the risk of operating personnel and property. |
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