火工品压药设备机电一体化研究

对火工品压药设备进行了研究，将压力检测，控制装置与机械设备有机结合，实现了火工品压药设备机电一全化，经生产验证提高了火工品压药密度一致性和产品质量。     

火工药剂细化技术评价与展望

论述了国内外火工药剂细化技术的研究概况 ,针对敏感起爆药的特殊性 ,借鉴其他领域超细材料制备方法 ,提出用微乳液合成法制备超细敏感起爆药。     

单试件多次加荷三轴抗剪强度试验方法研究

本文介绍了在三轴抗剪强度试验中采用单试件多次加荷的方法取得的结果是可靠的     

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目前，世界海洋天然气年产量4500×108m3，占世界天然气年总产量的21％。海上天然气的开发不仅环境严峻、技术复杂、投资巨大，而且建设周期长、现金回收晚，风险性较大。到目前为止，开发的都是一些大型的商业性天然气田。而大量的边际气田一般为地处偏远的海上中小型气田，如采用常用的固定式平台进行开发，收益较低，风险太大，对投资者无足够的吸引力。浮式液化天然气生产储卸装置(FPSO)是一种新型的边际气田开发技术，具有投资低、建造周期短、可重复使用的优点。文章介绍了浮式液化天然气生产储卸装置的概念，结合国际上最新的设计方案对该装置的液化流程、LNG储存系统、卸货系统以及总体布局进行了说明。     

Development of a new loading test apparatus for microfocus X-ray CT and its application to the investigation of soil behavior surrounding driven open-section piles

In recent years, X-ray CT scanners with task-specific modifications, such as microfocus and/or a synchrotron, have been widely implemented in a variety of fields, including medical and industrial fields. Since microfocus X-ray CT systems enable the visualization of whole samples, and also yield a relatively high resolution of the region of interest in the sample, they are commonly utilized in the fields of soil mechanics and geotechnical engineering. This paper describes a novel loading test apparatus that is specifically designed for microfocus X-ray CT systems capable of performing loading tests to investigate soil behavior during the installation of driven open-section piles. The loading tests were designed to take the micro-level spatial resolution of microfocus X-ray CT systems into account. Digital image correlation (DIC) is subsequently implemented to analyze the obtained CT images, making it possible for measurements to be taken of the displacement fields in the ground following installation of the model pile. Finally, the versatility of this novel test apparatus is proof of its high potential for application in different types of loading tests.     

基于AMESim的比例溢流阀加载系统建模与分析

设计了比例溢流阀加载系统,分析了系统的工作原理,运用AMESim建立了系统的仿真模型,然后通过改变主阀芯和先导阀芯的质量以及主阀芯的黏性阻尼系数,研究各参数对加载系统动态特性的影响,为比例溢流阀加载系统的设计提供了参考。     

Dynamic rock tests using split Hopkinson (Kolsky) bar system e A review

Dynamic properties of rocks are important in a variety of rock mechanics and rock engineering problems. Due to the transient nature of the loading, dynamic tests of rock materials are very different fr...     

偶然荷载工况作用下LNG储罐荷载的选取及组合

偶然荷载工况作用下大型液化天然气储罐的结构分析是大型LNG储罐技术研发的重要组成部分,而目前偶然荷载工况的荷载取值无据可依。本文针对这一问题,参考了欧洲标准、美国规范以及建筑荷载规范中的相关规定,指出了偶然荷载工况作用下所需考虑的荷载类型,并提出了具体可行的荷载组合公式,以服务于国内大型LNG储罐的开发和设计工作。     

螺旋板载荷试验操作及资料整理

通过实例介绍了螺旋板载荷试验的具体操作及注意事项,并对数据资料进行整理及分析,对试验地层给出了准确的工程设计参数,为该原位测试应用于具体工程项目中提供了指导。     

3D-CFD analysis of diffusion and emission of VOCs in a FLEC cavity

This study is performed as a part of research that examines the emission and diffusion characteristics of volatile organic compounds (VOCs) from indoor building materials. In this paper, the flow field and the emission field of VOCs from the surface of building materials in a Field and Laboratory Emission Cell (FLEC) cavity are examined by 3D Computational Fluid Dynamics (CFD) analysis. The flow field within the FLEC cavity is laminar. With a total flow of 250 ml/min, the air velocity near the test material surface ranges from 0.1 to 4.5 cm/s. Three types of emission from building materials are studied here: (i) emission phenomena controlled by internal diffusion, (ii) emission phenomena controlled by external diffusion, and (iii) emission phenomena controlled by mixed diffusion (internal + external diffusion). In the case of internal diffusion material, with respect to the concentration distribution in the cavity, the local VOC emission rate becomes uniform and the FLEC works well. However, in the case of evaporation type (external diffusion) material, or mixed type materials (internal + external diffusion) when the resistance to transporting VOCs in the material is small, the FLEC is not suitable for emission testing because of the thin FLEC cavity. In this case, the mean emission rate is restricted to a small value, since the VOC concentration in the cavity rises to the same value as the surface concentration through molecular diffusion within the thin cavity, and the concentration gradient normal to the surface becomes small. The diffusion field and emission rate depend on the cavity concentration and on the Loading Factor. That is, when the testing material surface in the cavity is partially sealed to decrease the Loading Factor, the emission rate become higher with the decrease in the exposed area of the testing material. PRACTICAL IMPLICATIONS: The flow field and diffusion field within the FLEC cavity are investigated by CFD method. After presenting a summary of the velocity distributed over the surface of test material and the emission properties of different type materials in FLEC, the paper pointed out that there is a bias in the airflow inside the FLEC cavity but do not influence the result of test emission rate, and the FLEC method is unsuitable for evaporation type materials in which the mass transfer of the surface controls the emission rate.