在动态情况下，运动通常为谐运动。
本文考虑一类振动落砂机简化力学模型的次谐运动、稳定性与分叉问题。
The subharmonic motions, stabilities and bifurcation problems for a simplified model of shaker are considered.
对于两端固定输流管道在基础简谐激励下的单模态系统，利用凹槽滤波器对系统的混沌运动进行了控制。
The chaotic motion of a pipe single mode system of the fixed supported at two ends under base excitation is actively controlled by introducing the feedback of notch filter.
本文分析了内燃机曲柄连杆机构往复运动件的高谐次运动对轴系惯量变化和固有频率的影响，并对一多缸机轴系进行了扭振计算。
The effects of high order motions of reciprocating parts on the variation of inertias and natural frequencies of crankshaft system are discussed in this paper.
再次，利用多尺度法分析船舶在波浪中接近主共振、亚谐共振和超谐共振时的非线性横摇运动，并给出三种共振的近似解。
Moreover, the multiscale method was used to study the main, ultraharmonic and subharmonic resonances of nonlinear rolling in waves, and the approximate solutions of the three resonances were given.
然后模拟了二维矩形液箱做简谐横摇运动引起的液体受迫晃荡，计算结果以箱壁不同高度处的压强时间历经给出，并与实验结果进行了定量比较。
Then, the forced sloshing in a two-dimensional rectangle box is simulated, and the time course of pressure at different height of the wall was gotten and compared with that of experimental result.
基于通用简谐梯形组合运动规律的构成方法，建立了凸轮机构从动件无因次通用曲线方程。
On the basis of a composing method of universal harmonic trapezoid motion laws, nondimensional general curve formulation of driven cam is built.
采用有限项谐函数作为凸轮机构从动件运动函数，称之为凸轮机构谐综合。
Harmonic syntheses of CAM mechanism is to use the sum of limited terms of harmonics as the transmission function of a CAM follower.
设粘弹性板的轴向运动速度为常平均速度与简谐涨落的叠加，建立轴向加速运动粘弹性矩形薄板的运动微分方程。
The axially moving speed is a simple harmonic fluctuation about a constant mean speed, the differential equation of motion of axially accelerating viscoelastic plate is established.
设粘弹性板的轴向运动速度为常平均速度与简谐涨落的叠加，建立轴向加速运动粘弹性矩形薄板的运动微分方程。
The axially moving speed is a simple harmonic fluctuation about a constant mean speed, the differential equation of motion of axially accelerating viscoelastic plate is established.
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