The axial locus of the rotor systems is a steady circle after full decay.
振动经过充分衰减后，转子系统轴心轨迹是比较稳定的圆。
This paper has proved that a plane curve cis a circle if and only ifc is the locus of a moving point that has a constant second power average of distances from n fixed points.
本文提出了确定内燃机配气机构刚度的三种数据处理方法，并对处理结果作出了分析、比较，确认二次刚度平均法是一种较好的实用方法。
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