Oscillations
Oscillations
Agenda Today 1 Simple harmonic motion 2 Pendulum 3 Damped harmonic motion
Agenda Today 1 Simple harmonic motion 2 Pendulum 3 Damped harmonic motion
Oscillation(振动)： The movement that repeat itself Simple harmonic motion:(简谐振动) Any oscillation that could be expressed as a sinusoidal function
Oscillation(振动）: The movement that repeat itself. Simple harmonic motion:(简谐振动） Any oscillation that could be expressed as a sinusoidal function
x=Acos(@t+p A:amplitude(振幅) p:phase constant(振动的“初位相”) (otp):phase(振动的“位相”) o:angular frequency(圆频率)
x Acos(t ) A ：amplitude(振幅） ：phase constant(振动的“初位相 ”) （ t+ ) ：phase(振动的“位相 ”) ：angular frequency(圆频率）
Frequency (频率)v:the number of oscillations that finished in one second. 2π Period(周期)T:the time needed to finish one oscillation 2π
Period （周期）T：the time needed to finish one oscillation 2 Frequency （频率）：the number of oscillations that finished in one second. 1 2 T