發(fā)布時(shí)間：2018-02-10 00:30

  本文關(guān)鍵詞： 折流板 結(jié)構(gòu)優(yōu)化 拓?fù)鋬?yōu)化 運(yùn)動(dòng)機(jī)構(gòu)　出處：《中國(guó)艦船研究院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：在新型發(fā)動(dòng)機(jī)研發(fā)的過(guò)程中,折流板裝置可以保證發(fā)動(dòng)機(jī)尾噴試驗(yàn)的安全進(jìn)行。隨著發(fā)動(dòng)機(jī)類型的多樣化,現(xiàn)有裝置已無(wú)法滿足試驗(yàn)過(guò)程中的使用要求,因此有必要對(duì)新型折流板裝置進(jìn)行研究。本文針對(duì)現(xiàn)有裝置的不足,提出兩種新型折流板裝置的總體方案,并對(duì)其進(jìn)行結(jié)構(gòu)優(yōu)化研究。有限元分析及結(jié)構(gòu)優(yōu)化技術(shù)逐漸成為現(xiàn)代結(jié)構(gòu)設(shè)計(jì)的重要手段,其中拓?fù)鋬?yōu)化技術(shù)更是當(dāng)前結(jié)構(gòu)優(yōu)化研究的重點(diǎn)與熱點(diǎn)。文章在對(duì)結(jié)構(gòu)拓?fù)鋬?yōu)化基本原理進(jìn)行研究的基礎(chǔ)上,探討不同數(shù)值算法在拓?fù)鋬?yōu)化中的計(jì)算效率。并對(duì)優(yōu)化過(guò)程中的數(shù)值不穩(wěn)定現(xiàn)象產(chǎn)生原因與解決方法進(jìn)行研究,通過(guò)算例對(duì)比不同過(guò)濾方法對(duì)拓?fù)鋬?yōu)化結(jié)果的影響。在對(duì)不同數(shù)值算法及過(guò)濾方法的研究基礎(chǔ)上,文章對(duì)折流板裝置中運(yùn)動(dòng)質(zhì)量最大的車輛通過(guò)面進(jìn)行結(jié)構(gòu)優(yōu)化。首先對(duì)其進(jìn)行拓?fù)鋬?yōu)化,并根據(jù)拓?fù)鋬?yōu)化結(jié)果設(shè)計(jì)車輛通過(guò)面的具體結(jié)構(gòu)形式。接下來(lái)對(duì)其進(jìn)行尺寸優(yōu)化,在滿足使用要求的前提下,兩新型方案車輛通過(guò)面較優(yōu)化前質(zhì)量分別下降29.4%及26.6%。對(duì)機(jī)構(gòu)優(yōu)化設(shè)計(jì)的方法進(jìn)行研究,在此基礎(chǔ)上建立折流板運(yùn)動(dòng)執(zhí)行機(jī)構(gòu)運(yùn)動(dòng)學(xué)及動(dòng)力學(xué)分析的數(shù)學(xué)模型、優(yōu)化目標(biāo)及評(píng)判準(zhǔn)則,并選取合適的優(yōu)化算法,對(duì)新型裝置的運(yùn)動(dòng)執(zhí)行機(jī)構(gòu)進(jìn)行優(yōu)化。首先分析機(jī)構(gòu)連桿質(zhì)量及長(zhǎng)度對(duì)最大驅(qū)動(dòng)力的影響,在此基礎(chǔ)之上確定優(yōu)化變量,進(jìn)而對(duì)運(yùn)動(dòng)執(zhí)行機(jī)構(gòu)進(jìn)行優(yōu)化。接下來(lái)對(duì)兩新型裝置的直接驅(qū)動(dòng)方案進(jìn)行優(yōu)化,最后從運(yùn)動(dòng)學(xué)及動(dòng)力學(xué)兩方面對(duì)各驅(qū)動(dòng)方案進(jìn)行對(duì)比分析。
[Abstract]:In the research and development of new engine, the baffle device can ensure the safety of engine tail injection test. With the diversification of engine types, the existing equipment can no longer meet the requirements of the test. Therefore, it is necessary to study the new baffle device. In view of the deficiency of the existing device, this paper puts forward two general schemes of the new type baffle plate device. Finite element analysis and structural optimization technology have gradually become an important means of modern structural design. Among them, the topology optimization technology is the focus and hot spot of the current structural optimization research. In this paper, the basic principle of structural topology optimization is studied. This paper discusses the computational efficiency of different numerical algorithms in topology optimization, and studies the causes and solutions of numerical instability in the optimization process. The effects of different filtering methods on topology optimization results are compared by an example. Based on the study of different numerical algorithms and filtering methods, This paper optimizes the structure of the most moving vehicle passing surface in the baffle. Firstly, it is topology optimized, and according to the result of topological optimization, the specific structure form of the vehicle passing surface is designed, and then the size optimization is carried out. On the premise of satisfying the requirements of use, the mass of the two new scheme vehicles is reduced by 29.4% and 26.6before compared with the ones before the optimization. The method of the optimum design of the mechanism is studied. On this basis, the mathematical model of kinematics and dynamics analysis of baffle motion actuator is established, the optimization target and criterion are optimized, and the appropriate optimization algorithm is selected. First, the influence of the mass and length of the linkage on the maximum driving force is analyzed, and then the optimization variables are determined. Then the motion actuators are optimized. Then the direct drive schemes of the two new devices are optimized. Finally, the kinematics and dynamics of the drive schemes are compared and analyzed.
【學(xué)位授予單位】：中國(guó)艦船研究院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TK407

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本文編號(hào)：1499227