本人新手，做abaqus作业遇到问题，求助各位前辈

做一道作业题，

Snow on a roof supported by thetruss shown below can be approximated as a distributed load of 250 N/m.Determine the reaction forces at A and E and the maximum vertical displacement.Each truss is made of steel rod with diameter 5 mm

我建立模型，分析后得到的结果。。。为什么力没有传到下面杆的感觉，而且上面变形好夸张啊。。。求各位前辈指导啊