讨论了平面运动刚体上惯性力系的简化问题；

This paper discusses the problem of the reduction of inertial force system of rigid body in plane motion .

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将造波水槽内二维浮体牵引弹簧回复液压缸的受力系统简化为弹簧—质量—阻尼器系统，建立数学模型，并根据牛顿第二定律得到运动方程式。

The model of a kind of wave energy device moored on seabed is simplified into a spring-mass-damping system, and then its motion equation is built according to Newton's second law.

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建立了带有TCR的单机无穷大系统的非线性状态方程，用以简化和模拟实际电力系统。

Nonlinear state equation of single machine infinite bus system with TCR is established to simplify and simulate real power system.

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