Due to the superposition of two responses with different frequencies, the ship motion is increased and the rolling motion is not symmetrical.
两个谐波响应的迭加，使横摇和纵摇运动响应显著增加，并且横摇运动不再左右对称。
2
The problem of fixed-point motion of symmetrical rigid-elastic system in gravitational field is studied in this paper.
本文研究了怕对称刚-弹系统在重力场中的定点运动。
3
Dual-piston driven. toothed bar and gear driven, structure is compact, position of assembly is symmetrical. Motion is swift. turning of output axis can be changed through simple reversal of piston.