用hypermesh畫的網(wǎng)格（地基為實(shí)體單元，上部建筑物為殼單元），導(dǎo)入abaqus后無法選中地基導(dǎo)入odb文件來平衡地應(yīng)力，提示我The selected region contains mixed dimensionalities. Stress cannot be used with these configurations.是什么原因？應(yīng)該怎么解決呢？