为了使高方平筛在停车阶段获得较为稳健的减振效果，对采用自调式惯性激振的高方平筛停车过程进行了动力学建模和数值模拟。在考虑三相异步电机制动时的机械特性和滚动轴承摩擦的前提下，建立了筛体、悬吊装置和自调式激振装置所组成系统的非线性动力学模型，运用4阶Runge-Kutta数值算法得到了偏心距不变式和偏心距自调式两种激振方式下停车过程的数值解。分析了自调式激振装置中初始偏心距、刚度和阻尼等对停车时间的影响规律。结果表明：只有在合适的参数匹配下，自调式激振方式才能获得较好的减振效果；适中的初始偏心距是提高减振稳健性的关键因素。该文结果对于振动机械中自调式激振装置的设计具有参考价值。

The method of numerical computation is employed to design a novel inertial exciter whose eccentric distance is self-adjustable for eliminating resonance in square plansifter during stopping process. Considering the mechanical characteristic of three-phase asynchronous motor and the friction torque of bearing, the nonlinear dynamic model of the system which consists of the body of sifter, the suspenders and the exciter is established. Since the eccentric distance of exciter is unchangeable and self-adjustable respectively, the four-order Runge-Kutta method is applied to compute the stopping process. The law of influence of the initial eccentric distance, stiffness and damping of the new exciter on the stopping time is analyzed. The results show that the maximum instantaneous amplitude and the stopping time can be greatly shortened during stopping period by the novel exciter which has the appropriate parameters, and the moderate initial eccentric distance can obtain robust vibration absorbing.