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利用动态有限单元法建立和推导二维等参形式四边形动态有限单元，研究了沟埋式管与土的动力相互作用，求得管周土体的静、动应力分布．结果表明，动态有限元法比一般动力有限元法更精确、有效．
The dynamic finite element method is used to establish and derive two-dimensional isoparametric quadrilateral dynamic finite element. The dynamic interaction between buried pipe and soil is studied and the static and dynamic stress distribution of soil around pipe is obtained. The results show that the dynamic finite element method is more accurate and effective than the general dynamic finite element method.