In　order　to　investigate　the　dynamical　deformation　modes,　load-bearing　capability　and　energy　absorption　behavior　under　different　conditions,　the　finite　element　models　of　grid　cylindrical　structures　filled　with　stagger-arranged　and　regular-arranged　triangular　cells　were　established.　The　results　indicate　that　the　deformations　of　both　grid　structures　with　different　arrangements　are　gradually　concentrated　to　the　impacted　end　with　increasing　the　impact　velocity,　while　cell　wall　thickness　has　little　effect　on　deformation　modes.　The　bearing　capacity　and　stiffness　of　the　staggered　arrangement　is　larger　than　the　regular　arrangement　because　of　the　different　deformation　modes.　At　the　lower　impact　velocity,　the　energy　absorption　capacities　of　the　grid　structures　with　different　arrangements　are　approximately　the　same.　With　the　impact　velocity　or　the　cell　wall　thickness　increasing,　both　of　the　grid　structures　have　stronger　energy　absorption　capabilities　and　efficiencies,　and　the　grid　structure　with　stagger-arranged　cells　has　better　energy　absorption　capability　than　one　with　regular-arranged　cells.　Most　of　the　energy　absorbed　by　grid　structure　is　converted　into　internal　energy,　while　kinetic　energy　has　a　less　proportion.