abaqus 壳单元接触分析出现问题？

Surface assembly_surf-3 includes edges. Except for shell edge loading, surfaces which include edges cannot be used with *dsload, *dsflux, *sfilm, *sradiate, *dsflow, *sflow, *dsecharge, *dsecurrent, *simpedance or *incident wave.

模型为三维壳单元，做接触分析