13.OscillatoryMotion振盪性運動(振動)DancersfromtheBandaloopProjectperformonverticalsurfaces,executinggracefulslow-motionjumps.帶個圈計劃的舞者在垂直的面上表演，執行幽雅的慢動作跳躍。Whatdeterminesthedurationofthesejumps?甚麼東西决定這些跳躍的持續時間？Disturbingasystemfromequilibriumresultsinoscillatorymotion.在平衡狀態中的系统受到干擾後就會進行振盪運動。13.1.DescribingOscillatoryMotion描述振盪性運動Example13.1.OscillatingRuler振盪中的尺13.2.SimpleHarmonicMotion簡單和諧運動A,Bdeterminedbyinitialconditions由初始條件確定Amplitude&Phase振幅和相位Velocity&AccelerationinSHM簡諧運動的速度和加速度GOTIT懂嗎?13.1.Application:Swayingskyscraper搖擺的摩天樓Example13.2.TunedMassDamper調諧質塊阻尼器13.3.ApplicationsofSimpleHarmonicMotion簡諧運動的應用TheVerticalMass-SpringSystem垂直式質塊彈簧系统TheTorsionalOscillator扭力振盪器ThePendulum單擺Example13.3.RescuingTarzan拯救泰山GOTIT懂嗎?13.2.ThePhysicalPendulum物理擺(複擺)Example13.4.Walking行走13.4.Circular&HarmonicMotion圓周與諧和運動GOTIT懂嗎?13.3.13.5.EnergyinSimpleHarmonicMotion簡諧運動的能量PotentialEnergyCurves&SHM位能曲線和簡諧運動GOTIT懂嗎?13.4.13.6.DampedHarmonicMotion阻尼諧動Att=2m/b,amplitudedropsto1/eofmaxvalue.t=2m/b時，振幅掉到最大值的1/e。Example13.6.BadShocks爛避震器13.7.DrivenOscillations&Resonance受驅振盪和共振Buildings,bridges,etchavenaturalfreq.建物，橋樑，等都有自然頻率。IfEarthquake,wind,etcsetsupresonance,disastersresult.如果地震，風，等形成共振，結果就是災難。