散体力学在引信准流体机构性能分析中的应用

【作者】 邱亚兰；

【导师】 王雨时； 闻泉；

【作者基本信息】 南京理工大学 ， 机械制造及其自动化， 2008， 硕士

【摘要】 准流体机构是一种典型的引信机构,主要起延期解除保险作用。因具有低成本、定时散布小的特点,故应用日渐广泛。但是关于引信准流体机构的分析与设计理论未见深入、系统地研究。准流体作为一种微小颗粒,在形态上属于颗粒体,具有散体的某些性质。为了更好地对准流体结构进行研究,参考散体力学中对散料在筒仓内的流型划分理论,将引信准流体在其腔室内的流型初步划分为侧孔流和中心流;借用散体力学中的侧压系数分析方法,给出了准流体侧压系数值;利用散体力学中Janssen分析方法,建立了准流体在腔室内的轴向压力和侧向压力计算公式;结合前人总结的散体在管道内的流量计算公式,针对引信准流体不同流型,提出了准流体加速度势的概念,分析和建立了引信准流体流量计算公式。通过侧孔流和中心流两种试验装置下准流体的流动试验,验证了准流体流型划分的正确性。最后将所得出的理论应用于制式引信产品,理论分析结果与实测值较为一致。更多还原

【Abstract】 The quasi-liquid device is a typical fuze device whose function is mainly to delay arming. It has been used gradually widely for its characters of low cost and narrow time spread. However, the analysis and design theory on the fuze quasi-liquid device have not been studied systematically and thoroughly.As a kind of exiguity granule, quasi-liquid has a form of granule body and some characters of bulk solid. In order to study the quasi-liquid arming device more systemically, the flow patterns of quasi-liquid in the conduits is partitioned into lateral flow pattern and central flow pattern according to the theory of flow pattern of bulk solid in silos. The lateral pressure coefficient is given consulting with the analysis method used in granular mechanics. The formulas for axes and lateral direction pressure of quasi-liquid in the conduits are established referring to Janssen’s analysis method. Combining with the flux formulas in the conduit of bulk solid summarized by former, the concept of acceleration potential is proposed and the quality flux formulas of the quasi-liquid in different flow patterns when flowing are analysed and setted up in allusion to the lateral flow pattern and central flow pattern. And the partition theory of flow pattern is proved by the experiments in both lateral and central pattern sets of devices. Finally, the formulas are applied to calculate the products for customization and the results of the calculation are agreed with the survey value.更多还原