本文選題：一維彈道修正 + 阻力系數(shù)　； 參考：《中北大學(xué)》2016年碩士論文

【摘要】：現(xiàn)代戰(zhàn)爭的作戰(zhàn)模式和戰(zhàn)場空間在很大程度上已發(fā)生改變,為滿足一系列作戰(zhàn)需求,要求彈箭在保證對目標(biāo)精確打擊的同時,最大程度降低對非軍事設(shè)施和平民的附加毀傷。彈道修正彈作為常規(guī)制式彈藥的一種,通過加裝修正控制裝置,對實際飛行彈道參數(shù)進行探測并加以修正,其命中精度高,成本低廉,已成為一種介于導(dǎo)彈與普通炮彈之間的新型精確打擊彈藥,相關(guān)技術(shù)的發(fā)展將成為主導(dǎo)未來戰(zhàn)爭成敗的關(guān)鍵因素。本文以安裝有阻力片的一維彈道修正彈為研究對象,結(jié)合一維彈道修正技術(shù),在分析研究阻力型一維彈道修正機構(gòu)工作原理的基礎(chǔ)上,重點設(shè)計并確定了一種用于提高彈箭飛行阻力的復(fù)合型雙層八片式射程修正機構(gòu)。借助動力學(xué)數(shù)值仿真軟件對其工作可行性和可靠性進行驗證分析,依靠流體力學(xué)仿真軟件對其氣動特性及射程修正能力進行定量分析與初步評估。具體研究工作主要體現(xiàn)為:首先,針對一維彈道修正機構(gòu)的工作原理與運動特性,提出修正機構(gòu)的總體結(jié)構(gòu)設(shè)計方案。以某155mm口徑制式旋轉(zhuǎn)穩(wěn)定彈為研究平臺,利用實體建模軟件Solidworks對修正機構(gòu)進行初步結(jié)構(gòu)設(shè)計與建模,使用ADAMS動力學(xué)仿真軟件建立機構(gòu)的動力學(xué)模型,對機構(gòu)在一定工況下的工作過程進行數(shù)值模擬,驗證了機構(gòu)在高速旋轉(zhuǎn)并承受一定載荷時的動力學(xué)性能及工作可靠性。其次,根據(jù)空氣動力學(xué)及外彈道學(xué)理論,建立計算用一維彈道修正彈氣動模型,利用FLUENT仿真軟件對彈丸加裝修正機構(gòu)前后的繞流流場進行數(shù)值模擬,得出不同工況下彈丸的氣動力參數(shù),重點對修正機構(gòu)的阻力片展開面積、展開時刻、開槽位置與開槽大小等參數(shù)對氣動特性的影響規(guī)律進行研究。最后,再次結(jié)合一維彈道修正技術(shù)及外彈道學(xué)相關(guān)理論,建立標(biāo)準(zhǔn)氣象條件下的一維彈道修正彈質(zhì)點運動模型。采用經(jīng)典四階定步長龍格—庫塔法編寫彈道程序,分析阻力片結(jié)構(gòu)參數(shù)變化、展開面積、展開時刻等因素對彈丸縱向射程修正能力的影響。通過以上研究表明,該修正機構(gòu)展開迅速且工作穩(wěn)定可靠,具有較強的一維彈道修正能力,可為一維彈道修正彈的進一步結(jié)構(gòu)設(shè)計提供數(shù)據(jù)參考。
[Abstract]:The combat mode and battlefield space of modern war have changed to a great extent. In order to meet a series of operational requirements, it is required that the missile and arrow should minimize the additional damage to non-military installations and civilians while ensuring the accurate attack on the target. As a kind of conventional ammunition, the ballistic correction projectile can detect and modify the actual flight trajectory parameters by adding a modified control device. The accuracy of the ballistic correction is high and the cost is low. It has become a new type of precision strike ammunition between missile and ordinary projectile. The development of related technology will be the key factor to dominate the success or failure of future war. In this paper, the one-dimensional ballistic correction projectile with resistive flaps is taken as the research object, and based on the analysis and study of the working principle of the one-dimensional ballistic correction mechanism of resistance type, combined with the one-dimensional trajectory correction technology, A compound double-layer eight-slice range correction mechanism is designed and determined to improve the flight resistance of projectile and arrow. The feasibility and reliability of the system are verified and analyzed with the help of the numerical simulation software of dynamics, and the aerodynamic characteristics and range correction ability are quantitatively analyzed and preliminarily evaluated by the hydrodynamic simulation software. The main research works are as follows: firstly, according to the working principle and motion characteristics of one-dimensional trajectory correction mechanism, the overall structure design scheme of the modification mechanism is put forward. Based on a 155mm caliber rotary stabilized missile, the structure of the modified mechanism is designed and modeled by using the entity modeling software Solidworks, and the dynamic model of the mechanism is established by using the ADAMS dynamic simulation software. The working process of the mechanism under certain working conditions is numerically simulated to verify the dynamic performance and reliability of the mechanism when it rotates at high speed and bears a certain load. Secondly, according to the theory of aerodynamics and exterior ballistics, the aerodynamic model of one-dimensional ballistic correction projectile is established, and the flow field around the projectile before and after the modified mechanism is numerically simulated by FLUENT software. The aerodynamic parameters of the projectile under different working conditions are obtained, and the influence of the parameters on the aerodynamic characteristics of the modified mechanism, such as the expansion area, the opening time, the slot position and the slot size, are studied. Finally, combined with the theory of one-dimensional trajectory correction and the theory of exterior ballistics, the motion model of one-dimensional ballistic modified projectile is established under the standard weather conditions. The ballistic program is compiled by the classical fourth order constant step Runge-Kutta method to analyze the influence of the structural parameters of the resistive sheet, the spreading area and the unfolding time on the correction ability of the projectile's longitudinal range. The results show that the correction mechanism is fast, stable and reliable, and has a strong ability of one-dimensional trajectory correction, which can provide data reference for further structural design of one-dimensional ballistic correction projectile.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TJ413.6

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