Geant4是一种应用广泛的通用蒙特卡罗程序包,其计算模型可以用几何描述标记语言(GDML)描述,然而依赖手工建模耗时且容易出错。本文提出了一种基于计算机辅助设计(CAD)的Geant4自动建模方法,该方法能够把复杂的CAD几何模型自动转换为Geant4支持的GDML格式几何模型。本文在多物理耦合分析自动建模软件MCAM平台上实现了该方法,通过了包括聚变反应堆模型FDS-Ⅱ在内的测试例题的测试与校验,初步验证了其正确性和有效性。
Geant4 is a widely used Monte Carlo transport simulation package. Its geometry models could be described in geometry description markup language (GDML), but it is time-consuming and error-prone to describe the geometry models manually. This study implemented the conversion between computer-aided design (CAD) geometry models and GDML models. The conversion program was integrated into Multi-Physics Coupling Analysis Modeling Program(MCAM). The tests, including FDS-]] model, demonstrated its accuracy and feasibility.