• 2022-07-01
    写出下图问题在极坐标系中上端水平边界的的应力边界条件[img=298x325]1803b3887b4dfb9.jpg[/img]
    A: [img=200x168]1803b388867910a.jpg[/img]
    B: [img=186x168]1803b388916fb99.jpg[/img]
    C: [img=200x168]1803b3889b7e316.jpg[/img]
    D: [img=276x180]1803b388a5860f3.jpg[/img]