强辐射棒料提升翻转机构抗震性分析及优化

Seismic analysis and optimization of lifting-turnover mechanism of strong-radiation rods

提升翻转机构是某强辐射棒料后处理系统的关键设备,根据相关设计规范,地震工况下要保证棒料不发生破坏,并且保证机构的安全功能和运行性能正常。为验证机构的抗震性能,采用基于ANASYS Workbench的分析方法,对该后处理系统中包含卷扬机组、钢丝绳、料仓架料仓、翻转小车及上/下导轨在内的提升翻转机构建立有限元模型并进行抗震计算,再根据ASME规范对主要部件及重要螺栓进行了应力评定和强度校核,同时对上导轨安装螺栓数进行了优化。结果显示,优化后的提升翻转机构满足核电抗震设计要求。

The lifting-turnover mechanism is the key equipment of the post-processing system of the strongradiation rod.According to the relevant design specifications,it is necessary to ensure that the rods does not break under seismic conditions and that the safety function and running performance of the mechanism are normal.To verify the seismic performance of the mechanism,based on ANASYS Workbench,finite element models of the lifting-turnover mechanism containing a hoist,a steel-wire rope,a silo rack-silo part,a rolling-over vehicle and upper/lower rails in the post-processing system,are established for seismic evaluation.Then,the stress assessment and strength check of the main units and the major bolts are carried out according to ASME codes,and the number of bolts installed on the upper rail is optimized.The simulation results show that the optimized lifting-turnover mechanism meets seismic design requirements of nuclear power plants.