本文利用拟板法对正交正放类、两向斜放类和三向类网架的动力问题进行了研究，导出了一般的振动控制方程。
In this paper, the dynamic problems of three kinds of space trusses are studied and the general vibration equations are derived by the plate analogy method.
用拟壳法建立了正三角形网格三向扁锥面单层网壳的轴对称非线性动力学基本方程。
By using the method simulated shells, the axisymmetrical non-linear dynamic equations of three-dimensional single-layer shallow conical lattice shells with equilateral triangle mesh are founded.
用拟壳法建立了正三角形网格的三向扁锥面单层网壳的非线性动力学微分方程。
Using the method of simulated shell, non-linear dynamic differential equation of three-dimensional single-layer shallow lattice shell with equilateral triangle mesh is established.
侵彻时的应力状态与压入法测硬度相似，靶内应力状态为三向压应力。
The penetration process is similar to Vickers hardness test, it is triaxial compressive stress condition in the target.
介绍一种研究岩体软弱结构面抗剪强度的新的试验方法———梯形试体三向千斤顶直剪试验法。
The distortion process of the rock bedded slope with weak structure surface is analyzed by RFPA-slope limited element procedure.
介绍一种研究岩体软弱结构面抗剪强度的新的试验方法———梯形试体三向千斤顶直剪试验法。
The distortion process of the rock bedded slope with weak structure surface is analyzed by RFPA-slope limited element procedure.
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