磁流变技术在引信延期解除保险机构中的应用研究

发布时间：2018-02-10 11:32

本文关键词： 引信磁流变液延期解除保险机构延期解除保险时间流场分析　出处：《南京理工大学》2011年硕士论文　论文类型：学位论文

【摘要】：磁流变液延期解除保险机构将磁流变液应用于引信延期解除保险机构中,具有安全性高,解除保险可靠性高,延期解除保险时间可调,结构简单等优点。但目前对引信磁流变液延期解除保险机构的研究还处在理论探索阶段,且存在设计理论不完善,磁流变液材料易发生沉淀现象等问题。采用理论分析、数值仿真和实验验证相结合的方法,对磁流变液在引信延期解除保险中的应用进行了以下几方面研究： 1.在先前研究的基础上,通过理论分析与计算,设计并加工了引信磁流变液延期解除保险机构样机。 2.根据磁流变液流体动力学理论,建立了引信磁流变液延期解除保险机构延期解除保险时问数学模型,得出了机构的延期解除保险时间公式。同时运用Ansys软件仿真分析了延期解除保险时间公式的正确性。仿真结果表明：该公式可以作为机构设计时的参考公式。 3.针对磁流变液的沉淀性问题,结合引信使用环境对磁流变液的要求以及本机构的特点,提出几种提高磁流变液沉淀稳定性的措施,并对商用磁流变液进行改进,配制出新的磁流变液,试验结果表明配制的磁流变液很好地解决了沉淀稳定性问题,适用于该引信磁流变液延期解除保险机构。 4.设计并完成了机构样机的静态试验与动态试验。静态试验研究机构的安全性能与解除保险可靠性能。采用自制的试验测试系统,研究了弹丸转速、泄流孔径、磁流变液参数、温度对机构延期解除保险时间的影响规律,试验结果表明影响规律与理论及仿真分析结果一致。按照兰利法设计了动态试验方案,完成了机构动态试验。试验结果表明：在1959年式130毫米加农榴弹炮发射环境下,机构的延期解除保险距离大于100m,机构的安全性、可靠性、延期解除保险距离符合设计要求。最后,对本文研究工作进行了总结,介绍了论文完成的主要工作和创新点,并对未来研究工作进行了展望。
[Abstract]:The magnetorheological fluid delay release insurance mechanism applies the magnetic rheological fluid to the fuze delay release insurance mechanism, which has the advantages of high safety, high reliablity and adjustable delay release time. However, the research on the delayed release mechanism of fuze magnetorheological fluid (MRF) is still in the stage of theoretical exploration, and the design theory is not perfect and the magneto-rheological fluid materials are prone to precipitate. With the combination of theoretical analysis, numerical simulation and experimental verification, the application of magnetorheological fluid in fuze deactivation is studied as follows:. 1. On the basis of the previous research, the prototype of the magnetorheological fluid (MRF) deactivation mechanism for fuze is designed and manufactured by theoretical analysis and calculation. 2. According to the theory of magnetorheological fluid hydrodynamics, the mathematical model of delay release of fuze magnetorheological fluid is established. At the same time, the correctness of the delay release time formula is analyzed by using Ansys software. The simulation results show that the formula can be used as the reference formula for mechanism design. 3. Aiming at the precipitation problem of magnetorheological fluid, combined with the requirement of fuze environment to MRF and the characteristics of the mechanism, several measures to improve the stability of MRF precipitation are put forward, and the commercial MRF is improved. A new magnetorheological fluid is prepared. The experimental results show that the prepared magnetorheological fluid solves the problem of precipitation stability well and is suitable for the fuze magnetorheological fluid delay release mechanism. 4. The static and dynamic tests of the prototype of the mechanism are designed and completed. The safety and reliability of the mechanism are studied by static test. The rotational speed of the projectile, the diameter of discharge and the parameters of the magnetorheological fluid are studied by using the self-made test system. The effect of temperature on the delay release time of the mechanism is studied. The experimental results show that the influence law is consistent with the theoretical and simulation results. The dynamic test scheme is designed according to Langley's method. The dynamic test of the mechanism has been completed. The test results show that under the environment of 130mm cannon-howitzer launched on 1959, the delay release distance of the mechanism is more than 100m, and the safety, reliability and the distance of the delayed release of the mechanism meet the design requirements. Finally, this paper summarizes the research work, introduces the main work and innovation of the paper, and prospects the future research work.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH112

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