Ceramic material had better performance than steel and copper and the shorter the stack, the lower the initial temperature for oscillation. 而從熱聲振動的方式來看，強制振動比自激振動具有更低的起振溫度。
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。
