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在实验中以两自由端附集中质量悬臂梁相互碰撞为模型 ,根据梁根部动应力变化规律 ,研究了梁碰撞减振机理。文中指出 ,从能量角度来说 ,梁主要通过碰撞转移及损失一部分能量来达到减振目的 ;从响应叠加角度来说 ,因碰撞时 ,脉冲力反相作用 ,使振动变小 ,达到减振目的。另外在实验中还观察到碰撞后阻尼增大的现象
In the experiment, the two free ends with concentrated mass cantilever beam collided with each other as a model, according to the variation law of dynamic stress at the root of beam, the vibration mechanism of beam collision was studied. It is pointed out from the energy point of view that beam mainly achieves the purpose of damping by transferring collisions and losing a part of energy. From the point of view of response stacking, due to the opposite effect of impulsive force during collision, the vibration is reduced and the object of damping is achieved . In addition, the experiment also observed the phenomenon of increased damping after the collision