对于下接头的负载情况，主要是下接头内部的压力，以及ACME螺纹带给下接

对于下接头的负载情况，主要是下接头内部的压力，以及ACME螺纹带给下接头的最大拉力50t，换算成力的话为490000N，以及最大扭矩10000N.m,内部压力为35Mpa进行有限元分析。其中添加负载后如图3.3所示，其中红色箭头表示内部压力,粉色箭头表示扭矩，蓝色箭头表示拉力。

For the load condition of the lower joint, it is mainly the pressure inside the lower joint and the maximum tensile force of the acme thread to the lower joint of 50t, which is 490000 N and the maximum torque of 10000 n m. The internal pressure is 35MPa for finite element analysis. After adding the load, as shown in Figure 3.3, the red arrow represents the internal pressure, the pink arrow represents the torque, and the blue arrow represents the tension.

The load of the lower joint is mainly the internal pressure of the lower joint, and the maximum pulling force of ACME thread to the lower joint is 50t, which is 490,000 N when converted into force, and the maximum torque is 10000N.m and the internal pressure is 35Mpa for finite element analysis. After the load is added, it is shown in Figure 3.3, where the red arrow indicates the internal pressure, the pink arrow indicates the torque and the blue arrow indicates the pulling force.