运用边界元方法求解了重力场中部分充液偏置贮箱内液体晃动的三维边值问题，并将系统运动的联立微分方程组交换后化为广义特征值问题来求解。
The boundary element method is applied to solve the three dimensional boundary value problem. The differential equations are transformed to a generalized eigenvalue problem to be solved.
本文给出了一般开链弹性机器人机构动力学方程。该方程是由关节广义坐标和杆件模态坐标联立的非线性微分方程组。
In this paper the governing equations of flexible manipulators are derived, which are nonlinear simultaneous differential equations of joint variables and link elastic modal coordinates.
本文将铁路轨道看作由钢轨和轨枕组成的双层弹性系统，用两个偏微分方程联立描述其振动。
In this paper the railway track is considered as a double elastic system of both rails and sleepers and the vibration is described in detail with two partial differential equations.
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