Keywords Arch Dam;Abutment Aseismatic Stability;Rigid body limit equilibrium analysis;Time domain explicit FEM;LDDA;Dynamic contact force iterative algorithm and Calculation efficiency;

• 拱坝;坝肩抗震稳定;刚体极限平衡;时域显式有限元;LDDA;动接触力迭代算法;计算效率;