固体火箭技术2024，Vol.47Issue(2)：222-230,9.DOI:10.7673/j.issn.1006-2793.2024.02.010
公路运输过程中固体火箭发动机药柱的累积损伤评估方法
Cumulative damage assessment method for solid rocket motor grain during highway transportation
摘要
Abstract
In order to study the cumulative damage of solid rocket motor(SRM)grain during highway transportation,the con-stant stress reciprocating tensile test of HTPB propellant was designed and carried out,and the fatigue characteristic curves of HT-PB propellant were fitted and analyzed.By processing the power spectral density data of equipment transportation experiments,the acceleration load spectrum of HTPB propellant grains vibration during highway transportation was obtained.A three-dimensional fi-nite element calculation model of the SRM was established,and the stress response of the SRM grain was simulated and calculated.The cyclic load situation was calculated using the rain flow counting method;according to Miner's linear cumulative damage model,the cumulative damage calculation and evaluation of HTPB propellant grains during highway transportation were carried out.It is concluded that during transportation,the maximum stress of the SRM is 0.021 MPa,the maximum strain is 0.031,and the maxi-mum displacement is 19.320 mm,all are located at the front stress release boot.After the SRM is transported by highway for 4000 km,the damage at the front stress release boot of the grain is the largest,with a damage rate of 0.080;The damage at the in-ner hole of the grain is the smallest,with a damage rate of 0.044.关键词
固体火箭发动机/公路运输/HTPB推进剂/结构完整性/累积损伤模型/循环振动载荷Key words
solid rocket motor/highway transportation/HTPB propellant/structural integrity/cumulative damage model/cyclic vibration load分类
航空航天引用本文复制引用
崔家源,强洪夫,王学仁,王广,王稼祥..公路运输过程中固体火箭发动机药柱的累积损伤评估方法[J].固体火箭技术,2024,47(2):222-230,9.基金项目
国家自然科学基金(11772352). （11772352）
