A Method for Large-Scale Parallel Simulation of Reactor Structural Mechanics

The structural mechanics simulation in reactor is an extremely complicated problem, which includes statics, fluid-induced vibration and wear. Because the entire structural mechanics simulation require dividing into 10 billion mesh elements, and then a large number of equations are generated to solve, the demand for high performance computing is urgent. Therefore, we conduct researches on E-class supercomputers, including reactor core geometric modeling, tens of billions of meshing, addition of physical parameters, regional decomposition, and solution of ultra-large sparse matrix equations. Furthermore, we propose a parallel workflow design, function design and architecture design scheme for large-scale parallel simulation of Generation IV reactors structural mechanics based on E-class supercomputer. By combining and optimizing of existing meshing tools and matrix equation solving methods, and finally verified its feasibility and correctness through calculation examples. In addition, the efficiency of the large-scale parallelism has also been significantly improved.