almost periodic motion

The instability of the unbalanced system motion may result in doubling period bifurcation, almost periodic motion and chaotic motion.

存在不平衡量时，系统失稳可能产生拟周期分岔、倍周期分岔并可能导致混沌振动。

Besides the equilibrium and periodic solution, the almost periodic solution, which sometimes appears as quasi-periodic solution, is also a long term regular motion of nonlinear system.

非线性系统的长期规则运动除了平衡点和周期解以外，概周期解，或有时表现为拟周期解也是一种长期规则运动。

When the initial stress is pressure stress, more complicated responses such as almost-periodic solutions and chaos motion are found in the system.

在顺流向初应力为压应力状态下，系统存在非周期响应，如概周期振动及混沌运动。