摘要
以1,3,5?三氨基?2,4,6?三硝基苯(TATB)基高聚物粘结炸药(PBX)材料为研究对象,在-40～75℃下开展了准静态的单轴拉伸、压缩试验,获得了预设17个温度点下的应力应变关系数据;以温度、应变为自变量,应力为因变量,基于支持向量机(SVM)算法对拉伸压缩条件下的应力应变关系进行了描述,并对构建的关系式进行了误差分析。结果表明,在-40～75℃内,材料的拉伸强度和压缩强度均随温度的升高而劣化,应力应变曲线的非线性和拉压非对称性特征变化明显;同时,采用一组参数基于SVM算法实现了不同温度下TATB基PBX拉伸压缩应力应变关系的描述,解决了模型参数常随温度变化的问题,构建的关系式平均绝对百分比误差不超过7.77%,相关系数均大于0.998,表现出了良好的适用性。
Taking 1,3,5-triamino-2,4,6-trinitrobenzene(TATB)-based high polymer bonded explosive(PBX)material as research object,the quasi-static uniaxial tension and compression tests were carried out at - 40-75 ℃,and the stress-strain rela-tionship data at 17 preset temperature points were obtained. Setting temperature and strain as independent variables,stress as dependent variable,the stress-strain relationship under the tension and compression conditions was described based on support vector machine(SVM)algorithm,and the error analysis of the constructed relationship was carried out. The results show that the tensile strength and compressive strength of the materials deteriorate with increasing the temperature in the temperature range of -40-75 ℃ and the non-linearity of stress-strain curve and asymmetry of tension compression change obviously. Meanwhile,a set of parameters based on SVM algorithm is used to realize the description of the tensile and compressive strain-strain relation-ship of TATB-based PBX at different temperatures,which solves the problem that the model parameters often change with tem - perature. The average absolute percentage error of the constructed relationship is not more than 7.77%,and the correlation coefficients are all greater than 0.998,showing a good applicability.
作者
段晓畅
孙杰
刘迎彬
常双君
赵龙
袁洪魏
唐维
DUAN Xiao-chang;SUN jie;LIU Ying-bin;CHANG Shuang-jun;ZHAO Long;YUAN Hong-wei;TANG Wei(School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China;Institute of Chemical Materials,CAEP,Mianyang 621999,China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2019年第5期410-416,I0005,共8页
Chinese Journal of Energetic Materials
基金
国家自然科学基金资助(11572292)
