Abstract
The mercury target at the Spallation Neutron Source (SNS) in Oak Ridge National Laboratory, Tennessee, works under a number of severe conditions: high temperature, radiation, mercury flow, and proton beam pulse pressures. Insufficient strength and durability of the target stainless steel vessel from beam pulse and thermal cyclic loads can lead to mercury leaks and premature target life termination. The parametric and non-parametric shape optimization tools (Isight, Tosca) from Dassault Systemes Extended Abaqus Package have been adopted at SNS to develop robust and reliable target designs. The durability evaluation with recognized leading Fe-Safe (structural fatigue) and Verity (weld fatigue) software is also included in optimization process. Design of Experiment (DOE) was performed to create the response surface for steel vessel structure. The response surfaces are used for design exploration on a basis of Abaqus and Fe-Safe different analyses results. The shape optimization of steel vessel filled with mercury was performed first time using Tosca optimization tool. Obtained complex results enable the consideration of possible trade-offs for the most feasible design.
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