20 research outputs found

    Biomass pyrolysis technologies based on infrared heating and key parameters of reaction device

    No full text
    生物质是一种清洁的可再生能源,生物质快速热解技术对生物质的利用很重要.本文提出将红外加热应用于生物质热解反应.根据生物质及其热解过程中的大分子中间产物的红外光谱图分析确定生物质热解过程中的红外吸收带,选择红外涂料.设计出基于红外加热的生物质热解反应器的炉体结构,应用Ansys Fluent对炉体燃烧室进行燃烧数值模拟,确定了最佳温度场分布

    Deformation and Failure of Polymer Bonded Explosives

    No full text
    The deformation and failure of pressed polymer bonded explosives under different types of loads including tension, compression and low velocity impact are presented. Brazilian test is used to study the tensile properties. The microstructure of polymer bonded explosives and its evolution are studied ..

    Experimental Study of the Impact Damage of Composition B and Plastic Bonded Explosive

    No full text
    A long pulse low velocity gas gun with a gas buffer is used to induce impact damage in cast Composition B and hot pressed PBXN 5. To obtain different damage states, a range of projectile velocities are used by controlling the launching pressure of gas gun. The stress history during impact loading..

    铸装B炸药的隔板实验数值模拟

    No full text
    本文对点火与增长化学反应速率模型进行了改进,采用DYNA2D程序对铸装B炸药的隔板实验过程以及热点的作用进行了二维数值模拟,并和实验结果进行了对照

    冲击压缩3DC/SiC复合材料的破坏波传播

    No full text

    用巴西实验评价炸药的力学性能

    No full text
    对巴西实验的原理、特点及其在炸药力学性能研究中的应用现状进行了介绍。设计了巴西实验装置,用巴西实验对炸药的力学性能进行了实验研究,对巴西实验进行了粘弹性近似分析。巴西实验能够比较准确、敏感地反映炸药的力学性能,具有试样制备简单、实验费用低等优点,是评价炸药力学性能的可行方法

    爆轰合成纳米超微金刚石的特性表征

    No full text
    用炸药爆轰的方法制备了纳米超微金刚石.用X射线衍射、透射电镜、激光拉曼光谱、红外吸收光谱、差热和热失重等表征了纳米金刚石超微粉的特性分析了合成条件对纳米金刚石结构和性质的影响纳米超微金刚石兼具纳米颗粒和超硬材料的双重特

    混凝土围堰拆除爆破切口参数计算与翻转运动分析

    No full text
    对三峡三期混凝土围堰拆除的爆破切口参数进行了计算 ,并对堰体的翻转运动进行了描述和分析 ,给出了堰体失稳、翻转的条件。此外 ,还提供了堰体翻转角 -时间(φ -t)和角速度 -时间 (ω -t) 的关系曲线

    Ultrasonic Evaluation of the Impact Damage of Polymer Bonded Explosives

    No full text
    The damage properties of polymer bonded explosives under dynamic loading were studied by using ultrasonic evaluation. Explosive samples were damaged by a low-velocity gas gun at different impact velocities. Ultrasonic examination was carried out with a pulse through-transmission method. Spectra anal..

    Experimental study on the impact damage of selected explosives

    No full text
    采用低速气炮对B炸药和PBXN-5高聚物粘结炸药进行冲击损伤加载.通过控制弹速对试样进行不同程度的损伤,同时记录冲击加载过程中应力变化过程.对冲击损伤形貌进行显微观察,同时对冲击损伤前后试样密度和声衰减进行测量.结果表明,B炸药和PBXN-5炸药均表现出脆性材料的损伤特征,但其材料组成上的不同也导致了二者损伤特征有所差异
    corecore