Three dimension finite element method is used to calculate the stress state of the cantilever during each construction stage.
因此对桥悬臂施工过程进行了三维有限元计算，分析了各个施工阶段的应力状态。
Based on the dynamic characteristics obtained with three dimension finite element method, the reduced mechanical model and parameters of lift ship structure can be modified and obtained.
利用三维有限元方法计算的结构动力特性和简化结构动力特性相等的原则修正升船结构简化力学模型，并确定了等效的升船机简化结构模型和系统参数。
For the multiphase flow measuring system on-line based on three dimension finite element method (3d FEM), the capacitance-based multiphase flow which is connected to the oil pipeline is a column.
基于三维有限元法的在线多相流测量系统，所接入输油管道的电容式多相流为圆柱形。
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