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喷水推进是一种高性能的船舶推进方式.针对当前船舶推进器存在的问题,介绍了一种新型以正排量泵为核心的喷水推进方式,比较分析了正/负排量泵喷水推进两者的优缺点,得出正排量泵喷泵喷是一种能进一步改善船只性能的推进技术.  相似文献   
2.
It can be beneficial to reduce vibrations in shipboard piping, so the authors designed a new kind of piping damper with a plunger-type accumulator. Special requirements for the piping damper included low impact displacement, low speed, as well as an appropriate locking speed. Inside the damper, a plunger-type accumulator was installed and on the outside of the piston rod, a tube with exposed corrugations was added. Between the piston and the cylinder, a clearance seal was added. Using mathematical modeling, the effects of the dynamic performance of the damper’s impact displacement on vibrations were observed. Changes to the clearance between the piston and the cylinder, the stiffness of the spring in the accumulator, the throttle valve size, and locking speed resistance of the damper were respectively simulated and studied. Based on the results of the simulation, dampers with optimal parameters were developed and tested with different accumulator spring stiffnesses and different throttles. The simulation and experimental results showed that parameters such as seal clearance between piston and cylinder, accumulator spring stiffness and throttle parameters have significant effects on the damper’s impact displacement, low speed resistance and locking speed.  相似文献   
3.
文章构建了炮兵作战能力的指标体系,运用综合模糊评判对数字化炮兵和机械化炮兵的作战能力进行评估,通过比较得出数字化促使炮兵作战能力由一般向极高的结论。  相似文献   
4.
文章分析了昼夜变化、季节变化、太阳黑子和耀斑等太阳活动对天波通信的干扰,并提出路相应对策。  相似文献   
5.
基于MGIS的炮兵阵地选择模型分析   总被引:2,自引:0,他引:2  
分析基于军事地理信息系统(MGIS)的炮兵阵地选择需要考虑的效能因素和安全因素,建立炮兵阵地选择的模型,并对炮兵阵地的选择结果进行了分析。  相似文献   
6.
数字化炮兵战斗力要素效能权重评估研究   总被引:1,自引:1,他引:0  
利用数理分析法研究了数字化炮兵战斗力要素效能权重评估问题,提出了评估原则,构建了评估模型,得出了评估结论,对提高我军数字化炮兵的整体作战效能有一定的指导意义。  相似文献   
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