The logical extension of discrete mass systems is one of an infinite number of masses. In the limit, this is a continuous system. Take the generalized beam-column as a generic representation:

1. Definition of tone Tones are pitch variations, which are caused by the differing rates of vibration of the vocal cords. 声调是由于声带振动的速率的不同而引起的音高变化

Chap. 14: Energy in Thermal Processes Solids, liquids or gases have internal energy t Kinetic energy from random motion of molecules translation rotation vibration

Previously saw (in Unit 19)that a multi degree-of-freedom system has the same basic form of the governing equation as a single degree-of-freedom system The difference is that it is a matrix equation

主要讨论工程结构中易于遇到且机 理相对清楚的横风向风振内容,包括涡 激振动(Vortex-induced- vibration)、驰 振(Galloping)、颤振(Flutter)及抖振 (Buffeting)

I Atom movement in sol ids mechanical movement thermal vibration (short-range migration) Thermal motion diffusion(long-range migration)

§1.1 简谐振动运动学 §1.2 简谐振动动力学 §1.3 阻尼振动 受迫振动和共振 §1.4~§1.5 简谐振动的合成

振动 共振 (简谐振动） 受迫振动 自由振动 阻尼自由振动 无阻尼自由振动 无阻尼自由谐振动