耦合摆运动中的位相与机械能流的方向  

Relation between the phase and the direction of the mechanical energy flow in a coupled pendulum movement

作　　者：袁玲[1] 管志莲[1] 

机构地区：[1]合肥工业大学理学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2007年第6期784-786,共3页Journal of Hefei University of Technology：Natural Science

摘　　要：用张紧的弦绳和2个相同的单摆构成的耦合摆振动系统,能直观地将物体间的机械能传递现象突出地显示出来;实验中获取的运动曲线,显示了拍的节点处,两摆的位相是交替变化的,两摆的振幅也跟随着位相而增减,即可得出结论,位相在前的摆,向位相在后的摆输出能量,位相决定了机械能流的方向。The oscillation system, which is constituted by stressed strings and two identical simple pendulums, can display mechanical energy transfer between two objects. A phase diagram obtained from the experimentation shows that phases of two pendulums transform in turn in beat oscillation and the amplitude of the two pendulums increases or decreases with the changing of the phases. The pendulum with the lead phase always transfers energy to the pendulum with the lag phase. In conclusion, the phase determines the direction of the mechanical energy flow in a coupled pendulum movement.

关 键 词：耦合摆 拍振动 位相 机械能流方向 

分 类 号：O321[理学—一般力学与力学基础]