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From a statistical point of view, the vibration of 70 ~ 80% is due to the cause of the rotor mass distribution.
从统计学来看，振动的70 ~ 80%是由于转子质量分布的原因引起的。
The relations between material characters combining with loading-strength and fragment mass distribution are also discussed.
还结合壳体材料性质及载荷强度，对破片的断裂特征及尺度分布进行了讨论。
The corresponding generalized mass matrix depends on both the mass distribution and the geometrical constraint characteristics of the system.
相应的广义质量矩阵既决定于体系的质量分布，又决定于几何约束特性。
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