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.
对层状晶体，由于振动的膜效应，使得沿平面层方向的格林乃森参量在某些温度范围内出现负值，而一般晶体的格林乃森参量总为正值。
Second, for layer crystals the Grüneisen parameter along the plane may be negative for some temperatures because of vibration film effects, but for other crystals is positive always.
意思是说，振动总相契合的。
利用声辐射阻力矩阵和振动面上的速度矢量预报了结构声辐射的总功率。
The acoustic radiation resistance matrix is combined with the velocity vector on a vibration surface to predict the total sound power radiated from the structure.
控制振动板结构的体积速度是降低结构总声功率和振动能量的一种有效策略。
Controlling the volume velocity of vibration plate has previously been shown to be a good strategy to reduce its overall sound radiation and vibration energy.
几乎对所有初始振动态，得到的总衰变宽度比线宽测量外推数据低约30％。
Nearly all of the computed decay widths are consistently underestimated by about 30% than those extrapolated from linewidth measurements.
控制振动板结构的体积位移是降低结构总声功率的一种有效策略。
Controlling the volume displacement of vibration plate has previously been shown to be a good strategy to reduce its overall sound radiation at low frequency.
发动机的各种故障会引起个别气缸气体作用力减小，导致总的反倒力矩平衡性恶化，致使发动机横向摆动加大，出现怠速异常振动。
It is pointed that engines various faults can make the gas acting pressure lower in individual cylinders, lead to worsen the balance of gross overturn moment, and wobble the idling engine.
发动机的各种故障会引起个别气缸气体作用力减小，导致总的反倒力矩平衡性恶化，致使发动机横向摆动加大，出现怠速异常振动。
It is pointed that engines various faults can make the gas acting pressure lower in individual cylinders, lead to worsen the balance of gross overturn moment, and wobble the idling engine.
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