空间上采用有限元线法进行半离散化，采用已有的轴对称单元、平面单元；
Using Finite Element Method of Lines smash the area in semidiscretization with plane or axial symmetry element which is develop by the postgraduate last session;
本文选用锥壳单元，介绍了轴对称旋转壳模态分析方法。
Model analysis method with cone shell element for axisymmetric shell is discussed in this paper.
采用轴对称有限元法计算了油罐的整体应力，引入接触单元法模拟地基与底板的相互作用。
The axisymmetric finite element method was proposed to calculate the whole stress of tank. This method applied the contact element to simulate the interaction between foundation and tank bottom.
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