大型回转负载作为陆上弹射试验中的发射主体,其发射后跌落至落地区所受的冲击载荷分布情况,将直接影响到其主体结构是否可以重复使用。本文利用MSC.Dytran软件,通过对大型回转负载结构进行流固耦合数值仿真计算的方法,研究结构和发射姿态等对负载跌落时的关键部位强度、整体应力和应变等的影响。研究结果表明,大型回转负载局部弱连接结构,可充分消耗其跌落至落地区所受到的冲击载荷,保护主体结构;沿负载应力分布方向密度递增式加强筋分布,可确保整体结构强度;发射角越大,跌落时负载受损情况越小。数值仿真结果和实际的试验结果均表明,通过结构优化设计,可使大型回转负载实现陆上弹射试验后的重复使用,能够大幅降低试验和制造成本。
Large rotary load is the main launching body in the land ejection test, the distribution of the impact loads that fall to the drop area after launch will directly influence whether the large rotary load can be reused. In this paper, using MSC.Dytran software, the method of numerical simulation of fluid-solid coupling is used to calculate the rotary load, and to study the influence of rotary load structure and launching attitude on the key parts' structural strength, overall stress and strain of the rotary load when it falls. The result show that the local weak joint structure of rotary load, can fully consume the impact load of it falling to the drop area, and protect the main structure. The strength of the whole structure can be ensured by increasing the density of reinforcement along the direction of stress distribution. The bigger the firing angle is, the less damage the missile suffers when falling. Both the numerical simulation and the actual test results show that the large rotary load can be reused after launching test on land through structural optimization design, which can greatly reduce the test and manufacturing cost.
2019,41(3): 88-92 收稿日期:2018-09-01
DOI:10.3404/j.issn.1672-7649.2019.03.017
分类号:V416
作者简介:王君(1981-),女,工程师,研究方向为潜载导弹水下发射技术
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