Through grey prediction GM (1, 1) model calculation and Matlab software prediction, the prediction of ground motion response of 400 m ³ storage tank is studied.First, the liquid height difference of the reservoir is set to 0.5 m, the total force, the base bending moment of the storage tank and the axial stress of tank wall under the horizontal earthquake are predicted under the different height of liquid storage.The prediction absolute error map is drawn, and the influence of earthquake intensity on the prediction error is obtained. Then, in order to further reduce the prediction error, the prediction effect is improved and the liquid height difference of the storage tank is adjusted to 1.0 m，reprediction the dynamic response of the storage tank. It is concluded that the interval of the high liquid difference data sequence of the storage tank increased from 0.5 m to 1.0 m. The relative error of the prediction results of the total horizontal seismic force and the base bending moment of the storage tank is reduced, after improvement, the prediction effect of bending moment and the axial stress of tank base are good.

The direct discontinuous Galerkin (DG) method was applied to calculate the soil instable temperature field of underground heated pipeline. This method applied partial integration from each computational cell for the heat transfer equation and obtained weak formulation.The direct DG was obtained by building appropriate numerical flux. The ordinary differential equations were gained by solving spatial discretization by means of the explicit Euler method. Through the calculation of the radial temperature field of heated pipeline ,its results coincide with other references'. Thus means that the direct discontinuous Galerkin method is an efficient and accurate numerical method for the calculation of instable temperature field.