The invention discloses a high-energy beam
welding stress deformation
simulation optimization method based on a pinhole effect, and aims to solve the problems of low
simulation precision, poor calculation efficiency, difficulty in
process optimization and the like in the prior art. Accurate
simulation and efficient optimization are realized through three core modules: a dynamic
molten pool behavior modeling module is coupled with energy interaction and dynamic evolution of
metal steam in a
small hole and a high-energy beam, and a dynamic heat
source model is constructed; the stress simulation module is combined with a
grain orientation model and a Newton-Raphson iterative
algorithm, so that the stress calculation precision is improved; the
welding structure rapid simulation module is based on a
hybrid grid technology, and adopts an algebraic multi-grid
algorithm to improve efficiency and balance precision and efficiency. According to the method, the
welding stress deformation can be accurately predicted (the error is smaller than or equal to 10%), the simulation efficiency of a large structure is greatly improved (the simulation efficiency is improved by 1-2 orders of magnitude), the
trial and error experiment cost is reduced by 30% or above, and the method is suitable for various high-energy beam welding processes and materials and can be widely applied to the high-end manufacturing fields of
aerospace, weaponry and the like.