Study On Vibration Of Bionic Conch Structure For Wave Power Generation

At present,the world economy is developing rapidly,but the rapid economic development brings a lot of environmental pollution,and the traditional energy is exhausted,so it is necessary to develop new energy to replace the traditional energy,which can not only reduce environmental pollution,but also reduce the development and utilization of mineral resources.And the ocean is rich in energy,so the development and utilization of marine energy is of far-reaching significance for the sustainable development of energy.Based on the above environment,this paper proposes a kind of sea wave power generation device,which uses the shell shape of conch ingeniously to design the power generation structure,and the device also uses resonance system to improve the wave conversion efficiency.Firstly,this paper introduces the research situation of wave power generation devices at home and abroad,and classifies the wave power generation devices which have been successfully developed at present according to the structural characteristics,and introduces the micro amplitude wave theory and the Froude krailov hypothesis method in detail,which is the theoretical basis for calculating the wave force.By comparing the wave force and energy absorption rate of three different shapes of floating bodies,i.e.horizontal cylinder floating body,vertical cylinder floating body and spherical floating body,the combination of vertical cylinder and spherical floating body is determined as the floating body shape through the final optimization,and the displacement change of the floating body after the wave force is calculated according to the shape of the combination after the optimization.Secondly,the three-dimensional solid modeling of the sea snail like wave power plant is carried out by using Solid Works.The working principle and the characteristics of the sea snail like wave power plant are mainly introduced.On this basis,the key parts of the sea snail like wave power plant and the design process of the hydraulic oil circuit are introduced.Finally,the selection of the generator type and the structure size are detailed Analysis and calculation.Then,based on the Lagrange equation of motion,the generalized coordinates of the system are established,and the dynamics and kinematics equations of the system are obtained by using the generalized coordinates.Then,Adams is used to simulate the kinematics and dynamics of the hydraulic cylinder in the involute structure,ANSYS is used to simulate the dynamics of the floating body of the power generation device,and the motion law of the structure is analyzed by the simulation results and theoretical calculation.Finally,the vibration analysis of the wave power generation device is carried out,the equivalent model of the vibration system is established according to the mechanical vibration theory,and the main vibration mode of the vibration system is obtained,then the steady-state solution,spring stiffness coefficient and damping coefficient of the vibration system are calculated.And MATLAB is used to simulate the vibration system,and the amplitude frequency response characteristic curve of the system is finally obtained.Through the characteristic curve,the motion law of the vibration system can be displayed more intuitively.