一種熱氣動彈性的多場耦合方法及其實(shí)現(xiàn)
發(fā)布時間：2018-08-04 19:37
【摘要】：隨著飛行速度的不斷提高,高超聲速流動條件下的熱氣動彈性問題受到越來越多的關(guān)注。與常規(guī)氣動彈性問題不同,熱氣動彈性問題涉及到高溫氣體效應(yīng)、邊界層效應(yīng)、結(jié)構(gòu)熱傳導(dǎo)以及熱輻射等研究內(nèi)容,需要計(jì)算流體力學(xué)(CFD)、計(jì)算結(jié)構(gòu)動力學(xué)(CSD)、計(jì)算熱力學(xué)(CTD)等多門學(xué)科的相互配合才能得以解決。針對上述問題,本文借助多場耦合方法對高超聲速機(jī)翼的熱氣動彈性問題開展了研究。首先研究了氣動加熱對結(jié)構(gòu)振動特征的影響,通過耦合的熱-結(jié)構(gòu)分析,研究了結(jié)構(gòu)在非均勻加熱下振動特征的變化；其次,提出并實(shí)現(xiàn)了一種流體-熱-結(jié)構(gòu)三場耦合方法,應(yīng)用該方法,在計(jì)算機(jī)集群上分析了機(jī)翼在不同加熱強(qiáng)度下的振動特征變化；最后,對上述研究結(jié)果進(jìn)行了總結(jié)。結(jié)果顯示,氣動加熱會明顯的降低機(jī)翼的振動頻率,隨著加熱強(qiáng)度的變化,機(jī)翼的振動模式會發(fā)生比較復(fù)雜的轉(zhuǎn)化。
[Abstract]:With the increasing of flight speed, more and more attention has been paid to the thermo-hydrodynamic elasticity in hypersonic flow. Different from conventional Aeroelastic problems, thermoAeroelastic problems are related to high temperature gas effects, boundary layer effects, structural heat conduction and thermal radiation. In order to solve this problem, the (CFD), of computational fluid dynamics (CFD),) and the calculation of structural dynamics (CSD), thermodynamics (CTD) and other disciplines are needed to solve the problem. In order to solve the above problems, the thermo-hydrodynamic elasticity of hypersonic wing is studied by multi-field coupling method. Firstly, the effect of aerodynamic heating on the vibration characteristics of the structure is studied, and the variation of the vibration characteristics of the structure under non-uniform heating is studied by coupled thermo-structural analysis. Secondly, a fluid-thermal-structure three-field coupling method is proposed and realized. Using this method, the vibration characteristics of the wing under different heating intensity are analyzed on the computer cluster. Finally, the results are summarized. The results show that aerodynamic heating can obviously reduce the vibration frequency of the wing. With the change of the heating intensity, the vibration mode of the wing will undergo a more complex transformation.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：V211.47
[Abstract]:With the increasing of flight speed, more and more attention has been paid to the thermo-hydrodynamic elasticity in hypersonic flow. Different from conventional Aeroelastic problems, thermoAeroelastic problems are related to high temperature gas effects, boundary layer effects, structural heat conduction and thermal radiation. In order to solve this problem, the (CFD), of computational fluid dynamics (CFD),) and the calculation of structural dynamics (CSD), thermodynamics (CTD) and other disciplines are needed to solve the problem. In order to solve the above problems, the thermo-hydrodynamic elasticity of hypersonic wing is studied by multi-field coupling method. Firstly, the effect of aerodynamic heating on the vibration characteristics of the structure is studied, and the variation of the vibration characteristics of the structure under non-uniform heating is studied by coupled thermo-structural analysis. Secondly, a fluid-thermal-structure three-field coupling method is proposed and realized. Using this method, the vibration characteristics of the wing under different heating intensity are analyzed on the computer cluster. Finally, the results are summarized. The results show that aerodynamic heating can obviously reduce the vibration frequency of the wing. With the change of the heating intensity, the vibration mode of the wing will undergo a more complex transformation.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：V211.47
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1 安效民;徐敏;;一種幾何大變形下的非線性氣動彈性求解方法[J];力學(xué)學(xué)報;2011年01期
2 陽峰;程功;;飛行器計(jì)算氣動彈性分析技術(shù)研究綜述[J];航空制造技術(shù);2011年Z2期
3 陳文俊;畢仕冠;;氣動彈性}P構(gòu)優(yōu)化，
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