蒙特卡罗仿真计算前处理平台的开发与初步验证

Development and Preliminary Verification of Monte Carlo Pre-processing Platform

当前,核设施与核装备越来越大型化、精细化和复杂化,这种发展趋势将大大增加传统手工编写蒙卡仿真计算模型的难度。针对此问题,本文利用开源几何引擎Open CASCADE开发了蒙卡仿真计算前处理平台,前处理平台提供几何模型的建立与修改、材料模型的创建与输入,以及从CAD模型到蒙卡仿真计算模型的转换等功能,以优化传统手工建模过程。本文主要阐述了前处理平台的总体架构设计、功能模块的实现情况,以及从边界表示法模型到构造实体表示法模型的转换过程,并对不同复杂程度的CAD模型进行了蒙卡仿真计算模型生成验证,初步验证结果表明,前处理平台能自动输出蒙卡仿真计算模型,避免了手工编写计算模型文本,简化了蒙卡仿真前处理过程。

Nowadays nuclear facilities and equipment are becoming larger, more sophisticated and more complex, and this trend makes it much more difficult to manually write the traditional Monte Carlo simulation models. This paper addresses this issue by developing a pre-processing platform for MC simulation using the open source geometry engine Open CASCADE. The pre-processing platform provides functions such as the creation and modification of geometry models, the input and assignment of material models and the conversion of CAD models to MC simulation models in order to optimize the traditional manual modelling process. In this paper, the overall architecture design of the pre-processing platform, the implementation of functional modules and the conversion process from boundary representation model to constructive solid geometry are described,and the MC simulation model generation is verified for CAD models of different complexity. The preliminary validation results show that the pre-processing platform can automatically output the MC simulation model,avoiding the need to write the model text manually and facilitating the MC simulation pre-processing process.