而用三维空间有限元方法计算总振动固有频率是比较准确的，但是耗费时间和精力都比较多。

The results of three dimensions space FEM model calculation has been proved to be more accurate, but it consumes too much time and money.

youdao

但是却没有变化，总的振动能。

And you see that there's no change in the total vibrational energy.

youdao

意思是说，振动总相契合的。

Which means vibrations are always matched.

youdao