Adams法求解涡激振动压电能量获取问题

Solving piezoelectric energy acquisition problem for vortex induced vibration with Adams method

研究流-机-电三相耦合圆柱涡激振动能量获取问题,使用矩阵法求解机电耦合频率和机电耦合阻尼,应用Fluent软件求解机电耦合振动方程得到圆柱振动响应,使用Adams法求解机电耦合输出电压和机电耦合输出功率。研究外接载荷对机电耦合输出电压、机电耦合输出功率的影响,以及尾流干涉下,机电耦合输出电压随外接载荷变化的情况。结果表明:Adams法求解机电耦合输出电压的频率范围更加广泛,机电耦合输出电压与外接载荷成正比,机电耦合输出功率在外接负载R=10~6Ω达到了最大值;在约化速度Ur=5时,尾流干涉下的机电耦合阻尼表现出对下游圆柱振幅起明显的抑制作用。

Here,the energy acquisition problem of vortex-induced vibration in a flow-machine-electricity threephase coupling flow around a cylinder was studied. The electro-mechanical coupled frequency and damping of the system were solved by using the matrix method,and the cylinder vibration response was obtained by solving the electromechanical coupled vibration equation with the software FLUENT. Then the electromechanical coupled output voltage and output power were solved with Adams method. The effects of external load on the electromechanical coupled output voltage and output power were investigated. Besides,the changes of electromechanical coupled output voltage with external load variation under wake interferences were examined. The results showed that the electromechanical coupled output voltage solved with Adams method has a wider frequency range; the electromechanical coupled output voltage is proportional to external load; the electromechanical coupled output power reaches its maximum value when the external load R = 106 Ω;when the reduced velocity Ur is equal to 5,the electromechanical coupled damping has an obvious suppression effect on the vibration amplitude of the downstream cylinder under wake interferences.