The anvil configuration model was established for impact system of 1200 kJ underwater pile driving hammer. By the numerical simulation of impact system with different configuration anvil, the rule between dynamic performance of impact system and the configuration parameters of anvil was discovered. On the basis of radial basis function, the approximate functions between dynamic performance and configuration parameters were obtained, and then the optimization model of anvil configuration was established. The optimization model was solved by the nonlinear optimal tool fmincon in MATLAB, whose results were analyzed by numerical simulation. The maximum relative error between optimized results and numerical results is 1.69%, which stated that the approximate functions established were valid. The optimized results meeting the dynamic strength were obtained for the impact system of 1200 kJ underwater pile driving hammer.
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