建立发动机气门振动的运动微分方程，该模型杆端作支承运动，考虑阻尼和较复杂的边界条件。
Considering damping and complicated boundary conditions for the valve support movement, the dynamic equation of the valve vibration of engine is found.
分析了含间隙运动副副元素的碰撞分离过程，指出线性弹簧阻尼模型不能满足接触边界条件并产生力突变；
This paper points out the disagreement of boundary conditions that generate force discontinuity in the linear spring damping contact model by analyzing the contact modulation of the clearance joint.
通过阻尼层与壳体作用的边界条件求解流固耦合振动方程，解得辐射声场的表达式。
Through the border conditions of damping layer combined with the shell the coupled oscillation equation was solve, and radiation sound field expression was shown using the shell displacements.
研究了具阻尼及动态边界条件的弹性板的指数可稳定性。
The elastic plate with damping and dynamical boundary feedback controls was studied.
因而用本方法可用来解决结构表面阻尼处理后的声辐射预测问题，应用边界条件非常广泛。此功能是一般商用软件所不能实现的。
Said method can solve acoustic radiation prediction after structure surface damping process with wide range application boundary condition which can not be realized by normal commercial software.
因而用本方法可用来解决结构表面阻尼处理后的声辐射预测问题，应用边界条件非常广泛。此功能是一般商用软件所不能实现的。
Said method can solve acoustic radiation prediction after structure surface damping process with wide range application boundary condition which can not be realized by normal commercial software.
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