基于光滑粒子与有限元耦合算法的放射性废液运输容器跌落分析

基于光滑粒子和有限元耦合算法,利用显式动力学分析软件LS-DYNA,对装载放射性废液的车载式废树脂接收装置在三种不同跌落方式下的跌落冲击过程进行了数值分析。以装置水平跌落为典型算例,对其在跌落过程中所受的动态激励、装置的压力变化和装置的应力状态进行了分析。结果表明,光滑粒子和有限元耦合算法对于解决装载放射性废液的运输容器在跌落冲击过程中流固耦合问题是有效的。同时,基于有限元分析结果,提出了一种按照RCC-M《压水堆核岛机械设备设计和建造规则》等规范对放射性物质运输容器跌落冲击过程进行应力强度评定的方法,并依据该方法对装置的结构强度进行了评定,结果显示装置在三种不同跌落方式下的应力强度均满足要求。

Dropping analysis of radioactive liquid waste transport container based on finite element method coupling with smoothed particle hydrodynamics method

Background:Dropping impact resistance property is a key characteristic for the transportation safety of transport container filled with radioactive liquid waste. Therefore, it is necessary to carry out dropping impact analysis of the transport container with the appropriate method during research and develop process. Purpose:Dropping impact analysis with appropriate method for the transport container filled with radioactive liquid waste was carried out to verify its dropping impact resistance property. Methods:Based on smoothed particle hydrodynamics method coupling with finite element method, dropping impact analysis of travelling spent resin incepting device filled with radioactive liquid waste in three different ways was carried out with LS-DYNA code which was an explicit dynamic analysis software. Besides, a stress strength assessment method for the device structure based on RCC-M and other rules was proposed, and the stress strength assessment was also performed with the method. Results:The dynamic excitation, the pressure variety and the stress of the device during dropping impact process were obtained in the paper. Conclusion:Smoothed particle hydrodynamics method coupling with finite element method is suitable for solving the fluid-structure interaction question during dropping impact process for the device filled with radioactive liquid waste. Furthermore, the strength of the device satisfies the requirement in three different ways of dropping.