基于 CADMesh 的蒙特卡罗自动建模方法及应用

摘要

为开展复杂结构场所辐射场蒙特卡罗模拟研究，使用开源的 CADMesh 接口程序实现一种将三维CAD 数据模型导入 Geant4的自动建模方法。对某废物处理设施进行自动建模，使用 Geant4内建的基于命令的统计功能计算周围剂量当量率分布。将周围剂量当量率分布模拟结果与实际测量结果进行对比，模拟结果在50％误差范围内与实测数据基本符合，初步验证了该自动建模方法的适用性。%An automatic modeling method which can import three‐dimensional CAD models into Geant4 was implemented using open‐source CADMesh interface program in order to carry out the Monte Carlo simulation research of complex structure sites’ radia‐tion field .A waste disposal facility was automatically modeled and then the distribution of ambient dose equivalent rate was simulated using the built‐in command‐based scoring in Geant4 .The simulation results of ambient dose equivalent rate distribution were com‐pared with the actual measurement results .It shows good agreements between simula‐tion results and the measurement results within 50% error . The applicability of the automatic modeling method was validated preliminarily .