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. 在再生式液体发射药火炮中，贮液室流体系统可能发生由自激振动与强迫振动构成的耦合振荡，在喷射结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为基础，分析了气浮式工作台由于微小自激振动的产生，而引起其定位精度劣化的内在原因。
Any system capable of a free vibration without external force is a counter example, e.g. a wire in the piano. 任何一个无外力而能自由振动的系统就是一个反例，譬如钢琴中的一条钢丝。
The free transverse vibration in an axially moving beam on fixed support is investigated by wave propagation. 摘要用波传播法分析研究了两端固支轴向运动梁的横向自由振动。
