哈尔滨地区，一般属良好或较良好的工程地质区，但是由于各种原因在不同地貌单元上分布着黄土状土，也称类黄土。
The engineering geologic property in the region of Harbin is commonly well, but for many reasons there is loess-like soil distributing on different physiognomy elements.
而且奇异单元刚度矩阵中的各元素可以用较简单的分析式表出。
Furthermore, each element in the singular stiffness matrix can be expressed by some more simple analytic formulas.
采用二维轴对称坐标系和按规定速度运动的任意四边形网格单元，燃烧室可具有较复杂的几何形状。
Two-dimensional axisymmetrical coordinates and mesh cells with the shape of an arbitrary quadrilateral are employed, which can move with a pre-scribed velocity.
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