Nonlinear Mechanical Vibration Of Isosceles Triangular Cross-section Hybrid Energy Harvester

With the need of real-time monitoring in engineering,military,medical and other fields,a kind of energy harvester,which uses energy acquisition technology to convert the energy obtained from environmental energy into electric energy and supplies power to monitoring network terminal equipment with low power consumption,came into being.Because environmental energy exists in nature and human life and production,which greatly increases the feasibility of energy harvesting by energy harvester,it has a wide application prospect and market.The energy harvester not only reduces the subsequent maintenance cost of monitoring equipment due to battery replacement,but also the collected environmental energy belongs to clean energy.However,the existing dynamic models of energy harvester are mostly based on linear structure,which can not accurately describe the nonlinear mechanical vibration and average output power of hybrid energy harvester found in experimental research.Therefore,it is necessary to study the nonlinear mechanical vibration and its corresponding average output power of the energy harvester with nonlinear structure as the research object.The specific research contents are as follows:（1）Firstly,based on Hamiltonian principle,the nonlinear partial differential dynamic equation of isosceles triangular cross-section hybrid energy harvester is established,and then the second-order ordinary differential nonlinear dynamic system of isosceles triangular cross-section hybrid energy harvester is obtained by using second-order Galerkin discretization;（2）Secondly,under the condition that the fixed end of the cantilever beam structure energy harvester does not move,the first and second order mechanical vibration and average output power of the isosceles triangular cross-section wind energy harvester are investigated when the wind speed gradually increases from 6m/s to 14m/s,and the difference between the results obtained under the two different conditions of nonlinear structure and linear structure is emphatically compared;（3）Finally,under the condition of periodic vibration at the fixed end of the energy harvester with cantilever beam structure,the effects of different wind speeds on the first-order and second-order mechanical vibration and average output power of the linear and nonlinear structures of the hybrid energy harvester are investigated respectively;B)The influence of different bearing amplitudes on the first-order and second-order mechanical vibration and average output power of linear and nonlinear structures of hybrid energy harvester when wind speed and bearing circular frequency are constant;C)the influence of different bearing circular frequencies on the first and second order mechanical vibration and average output power of linear and nonlinear structures of hybrid energy harvester when wind speed and bearing amplitude are constant;...