基于非线性灰模型下贮油罐上水变形分析

Analysis of oil tank water-pressure deformation based on non-linear gray model

大罐上水过程中的沉降变形具有规律性.利用灰色系统理论,把离散的沉降观测数据按某种序列(或某一约束条件)排列,考虑到大罐充水过程变形形式,分别建立了基于线性和非线性关系下的一阶连续灰微分沉降模型;同时选择上水水位高和上水时间序列作为模型变量分别进行解算,显示了软基础下的大罐,上水速度与罐体沉降变化基本呈线性的特点,就此推导了以连续时间变量序列来拟合与预测大罐上水过程的沉降变形模型.所提出的解算方法,可以方便大罐沉降变形的过程和规律分析,对指导同类上水试验工作具有一定意义.

Tank allusion sinking deformation takes on some orderliness. By the gray theory, changing the discrete sinki condition）, considering the ng de observation data into a sequence with some regulations （or defined formation mode in the process of tank allusion, sinking gray model based on the first-order continuous gray differential equation with linear and non-linear relationship respectively was set up. Both the water height in tank and the time order of allusion were chosen as variables. The calculation result shows that the relationship of the speed of affusion and the tank sinking quantity is linear when tank is located on the soft terrene. Thus, sinking gray model was deduced to fit or predict tank sinking deformation with continuous time sequence as variable of oil tank allusion. This method is easy to simulate and predict the sinking process and is significant to such tank allusion test.