By supposing the displacement shape functions and applying the Galerkin method, the dynamical equations with respect to time were gained.

通过位移形函数假设，采用伽辽金积分方法得到了时间变率的动力学控制方程；

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Sail area is usually planned by boat designers based on the boat's size, displacement (weight), and hull shape and configuration - not the number of masts or sails.

帆面积通常是由帆船设计者根据帆船的尺寸，重量，船底形状和配置来确定的，而非根据桅杆或船帆的数量。

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This thesis deduces computational formulations of displacement sensitivity and stress sensitivity in structural shape optimization considering geometric nonlinear element.

推导了考虑几何非线性项的结构形状优化位移灵敏度和应力灵敏度计算列式。

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