Oscillation and vibration are both simple harmonic motion of a body about a mean position. The difference lies in the force that causes the simple harmonic motion.In oscillation, the force that causes the body to return to the mean position is an external force. For example, gravity in case of simple pendulum.On the other hand, vibration refers to the simple harmonic motion of a body due to the forces developed by virtue of the physical properties of the body. Example the deflectiom of a cantilever beam that results in elastic deformation which in turn causes the beam to vibrate（轉自quora）oscillation是由外力引起的回到平均位置的振動。比如重力作用下的鐘擺vibration是物體本身的性質引起的振動。例如彈性形變的懸臂（cantilever）梁
Oscillation and vibration are both simple harmonic motion of a body about a mean position. The difference lies in the force that causes the simple harmonic motion.In oscillation, the force that causes the body to return to the mean position is an external force. For example, gravity in case of simple pendulum.On the other hand, vibration refers to the simple harmonic motion of a body due to the forces developed by virtue of the physical properties of the body. Example the deflectiom of a cantilever beam that results in elastic deformation which in turn causes the beam to vibrate（轉自quora）oscillation是由外力引起的回到平均位置的振動。比如重力作用下的鐘擺vibration是物體本身的性質引起的振動。例如彈性形變的懸臂（cantilever）梁