Ceramic material had better performance than steel and copper and the shorter the stack, the lower the initial temperature for oscillation. 而从热声振动的方式来看，强制振动比自激振动具有更低的起振温度。
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。
