SN方法粒子输运计算建模方法研究与系统发展的中期报告摘要基于SN方法（SphericalHarmonicsExpansion-DiscreteOrdinatesMethod）的粒子输运计算是当前核工程领域中广泛应用的一种方法。本文针对SN方法粒子输运计算建模方法进行了研究和探索，并在此基础上开发了相应的系统。本文介绍了该系统的主要设计思想和实现过程，重点讨论了SN方法模型的建立和计算方法的实现，以及系统优化与性能测试。最终，该系统可成功模拟和计算各种类型的辐射场问题，具有良好的精度和计算效率。该工作为SN方法的应用提供了一种新的工具和方法，有望在核工程领域中得到更广泛的应用。关键词：SN方法；粒子输运；计算建模；系统发展；中期报告AbstractTheuseoftheSNmethod(SphericalHarmonicsExpansion-DiscreteOrdinatesMethod)forparticletransportcalculationsisawidelyusedmethodinthefieldofnuclearengineering.Inthispaper,wehavestudiedandexploredthemodelingmethodofparticletransportcalculationbasedontheSNmethod,anddevelopedacorrespondingsystembasedonthis.Thispaperintroducesthemaindesignideasandimplementationprocessofthesystem,focusesontheestablishmentoftheSNmethodmodelandtheimplementationofthecalculationmethod,aswellasthesystemoptimizationandperformancetesting.Finally,thesystemcansuccessfullysimulateandcalculatevarioustypesofradiationfieldproblemswithgoodaccuracyandcalculationefficiency.ThisworkprovidesanewtoolandmethodfortheapplicationoftheSNmethod,andisexpectedtobemorewidelyusedinthefieldofnuclearengineering.Keywords:SNmethod;particletransport;modelingandcalculation;systemdevelopment;mid-termreport