末級發動機 的英文怎麼說
中文拼音 [mòjífādòngjī]
末級發動機
英文
final stage engine-
In this thesis, based on pershing ii surface to surface missile, a new kind of ballistic missile was designed with an additional rocket engine, which can be ignited twice. firstly, aerodynamic computational models of missile body and warhead which reentry with supersonic are built according to the task requirements ; secondly, the propulsion system model of missile is built whose first two stages are solid rocket engines and the third stage is liquid - solid combined rocket engine. the nozzle and the shape of the engine are designed to meet the needs of the populsion project ; thirdly, the trajectory model of the mass point is built and a wavy trajectory is designed & optimized ; finally, the ability of a missile ' s breaking through defence is analyzed
以美國潘興導彈為原型，增加可兩次點火的末級發動機，改裝成具有跳躍能力的地地彈道導彈；首先，根據任務需求，建立了導彈的氣動模型，並建立了彈頭再入時高超聲速氣動模型；其次，建立了導彈推進系統模型，前兩級採用了固體火箭發動機，第三級採用了固?液組合火箭發動機，並在總體方案要求下，對發動機噴管和外形進行了設計；第三部分，建立了導彈質點彈道模型，設計了一條跳躍式彈道，並對跳躍式彈道進行了優化設計；最後，對導彈進行了突防能力分析，從分析的結果可以看出，跳躍式彈道的突防能力比常規的拋物線彈道要強。The worldwide corporate governance movement that the 90 ' s of 20 centuries appear, through 10 years " development, have entered for mature stage, the focus of corporate governance movement changes gradually from the establishment of the corporate governance principle to the practic, namely how an individual listed company establishes corporate governance strategy according to the corporate governance principle, increasing the level of corporate governance, and how the investors decide their investment based on corporate governance. at the end of 90 ' s, standard & poor ' s, clsa, deminor etc. starts to release their corporate governance rating service at the emerging market and the developed market
20世紀90年代出現的全球范圍內的公司治理運動，經過10年的發展，已經進入成熟階段，公司治理運動的焦點逐漸由宏觀層面治理原則的制定轉向微觀實踐，即單個上市公司如何根據公司治理原則制定公司治理戰略，提高公司治理水平，以及投資者如何基於公司治理進行投資決策。相應地，作為公司治理量化指標的公司治理評級在90年代末開始逐步發展起來。 90年代末21世紀初，標準普爾、里昂信貸、戴米諾等評級機構開始在新興和發達市場推出公司治理評級服務。Abstract : solid propellant rocket motors are preferred for most ballistic missiles because they need simple maintenance and can be launched quickly. but the conventional thrust termination devices limit the depletion of every stage ' s grain and increase some extra - weight. an improved method for designing a multi - stage solid rocket based depleted shutdown was provided. in order to solve the problem of lack of thrust termination devices, a device to adjust the burnout angle will match the final burnout velocity and satisfy the desired range. the method can also limit the detection from anti - ballistic missile system
文摘:由於維護簡單和發射快速，彈道導彈多用固體火箭發動機，但繁雜的推力終止裝置使各級裝藥不能耗盡並讓結構增重.提出了一種對基於耗盡關機多級固體火箭概念設計的改進方法，此方法滿足導彈系統主要的戰技要求.為解決無推力終止裝置的末速不準問題，可在末級發動機採用姿態調整裝置，對射角進行調整，配合末速以滿足射程要求.本方法還可抑制敵方反導探測Using the ipga and setting the terminal speed increment of the upper stage and the manufacture cost of cpkm as objective functions, the rocket motor are processed dual - objective optimization design that has six design parameters
採用ipga演算法，以該運載火箭上面級末速度增量最大及cpkm發動機的製造成本最低作為目標函數，對該發動機進行了雙目標優化設計。分享友人