二维浅水水流的一种新型三角形网格FVM计算格式

将三角形网格良好的边界拟合性能与有限体积法守恒性质好、求解速度快的优点相结合，构造了适用于三角形网格的有限体积计算模式，模式以交替方向隐式(ADI)求解．采用长江三峡工程河段水流资料对模型进行验证计算，将实测值与计算值作了对比，结果令人满意．

A new triangular-grid FVM algorithm for 2-D shallow water flow

The feasibility of two usual engineering measures of setting peripheral joints and base joints to prevent cracking and yielding of high arch dams is studied for arch dam design. Different nonlinear material models of dam bodies, joints, and dam foundations are adopted in the calculation. With the Xiaowan arch dam, 292m in height, as an example, the displacement field, stress field, and cracked and yield region of the dam in the absence and presence of joints in the dam body are compared, with emphasis placed on the influences of joints on the cracking and yielding of the dam body. The results show that without joints, large areas of cracking and yielding occur in the cushions near the dam foundation, and that peripheral joints and base joints obviously reduce the cracking and yielding in cushions and near the dam heel, while on two sides of base joints, especially at the ends of the joints, the yielding in the cushion is more serious than that without joints. It is also concluded that the effect of peripheral joints is superior to that of base joints, and that joint setting should be limited to the regions where joint face cracking occurs.