14-1 Simple Harmonic Motion (SHM)简谐振动 14-2 Amplitude Period Frequency phase简谐振动的振幅,周期,頻率和位相 14-3 The Energy of SHM简谐振动的能量 14-4 Damped Vibration& Forced Vibration Resonance阻尼振动受迫振动共振 14-5 Superposition of two SHM with same Frequency in same Direction同方向同頻率的简谐振动的合成 14-6 Superposition of two Perpendicular SHM相互垂直的简谐振动的合成
Two different points of view in analyzing problems in mechanics The Eulerian view(欧拉观点) and the Lagrangian view(拉格朗日观点) Flow classification Streamline(流线)Pathline(迹线)& Flowfield (流场)流线方程计算流谱 Surface force(表面力) and body force(质量力,体积力)
Chapter3 Integral Relations(积分关系式) for a Control Volume in One-dimensional Steady Flows 3.1 Systems(体系) versus Control Volumes(控制体) System: an arbitrary quantity of mass of fixed identity. Everything external to this system is denoted by the term surroundings, and the system is separated from its surroundings by it's boundaries through which no mass
Boundary layer(边界层) Although frictional effects in slightly viscous fluid are indeed present, they are confined to a thin layer near the surface of the body, and the rest of the flow can be considered inviscid. (1904, Prandt/)
Chapter 4 Differential Relations For Viscous Flow 4.1 Preliminary Remarks Two ways in analyzing fluid motion (1)Seeking an estimate of gross effects over a finite region or control volume. Integral ()Seeking the point-by-point details of a flow pattern by analyzing an infinitesimal region of the flow