在金属枝晶的单向凝固过程中引入具有相同基频的正弦波、三角波和方波振动，发现其对枝晶生长形态的影响依次增强。结果分析表明，这与振动干扰频谱与固液界面的特征频域是否耦合及振动能量在该频域内的分布有关。由此可以说明振动对凝固影响的一些实际现象。 In the unidirectional solidification process of metal dendrites, sinusoidal, triangular and square wave vibration with the same fundamental frequency are introduced, and the influence on the dendrite growth morphology is enhanced in turn. The analysis of the results shows that this is related to whether the vibration frequency spectrum is coupled with the characteristic frequency-frequency domain of the solid-liquid interface and the distribution of the vibration energy in the frequency domain. This can explain some of the actual phenomenon of vibration on the solidification.