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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 universal Monte Carlo package whose computational models can be described in Geometrical Description Markup Language (GDML), however relying on manual modeling is time consuming and error prone. In this paper, a Geant4 automatic modeling method based on computer aided design (CAD) is proposed, which can automatically convert complex CAD geometric model into GDML geometric model supported by Geant4. This method is realized on the MCAM platform of multi-physics coupled analysis automatic modeling software. The test and verification of the test cases including FDS-Ⅱ are validated. The correctness and validity of the method are verified.