In the regenerative liquid propellant gun,the coupling oscillation of the fluid sys-tem in the reservoir including free vibration and forced vibration may be formed. 在再生式液體發射葯火炮中，貯液室流體系統可能發生由自激振動與強迫振動構成的耦合振蕩，在噴射結束期很可能形成共振。
Based on the previous work, this paper analyses the reason for small self-excited vibration of the aerostatic x-y stage, which reduce the positioning accuracy. 摘要以前期研究工作為基礎，分析了氣浮式工作台由於微小自激振動的產生，而引起其定位精度劣化的內在原因。
Any system capable of a free vibration without external force is a counter example, e.g. a wire in the piano. 任何一個無外力而能自由振動的系統就是一個反例，譬如鋼琴中的一條鋼絲。
The free transverse vibration in an axially moving beam on fixed support is investigated by wave propagation. 摘要用波傳播法分析研究了兩端固支軸向運動梁的橫向自由振動。
