Structural optimization of elliptical-tip star propellant grain using sub-problem approximation

Muhammad Adnan; SUN Bing; ZHANG Jian-wei; Ali Sarosh

Structural optimization of elliptical-tip star propellant grain using sub-problem approximation

School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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- 文章访问数: 1222
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出版历程
- 收稿日期: 2011-03-28
- 修回日期: 2011-10-12
- 刊出日期: 2012-02-28

Structural optimization of elliptical-tip star propellant grain using sub-problem approximation

School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: A method is presented here for structural optimization of elliptical-tip star grain.The grain structural integrity was improved by minimizing the most critical area of inner bore hoop strain during cool down.Optimization was done by sub-problem approximation method in conjunction with finite element analysis.Both radii of the ellipse were varied during optimization to find the optimal ellipse.The optimization resulted in grain geometry having minimum level of Inner bore hoop strain without violating the preset limits of burning perimeter.The von mises strain at grain inner bore was also reduced in resultant grain.
- solid propellant grain /
- star grain /
- viscoelastic analysis /
- structure optimization /
- sub-problem approximation
Abstract: A method is presented here for structural optimization of elliptical-tip star grain.The grain structural integrity was improved by minimizing the most critical area of inner bore hoop strain during cool down.Optimization was done by sub-problem approximation method in conjunction with finite element analysis.Both radii of the ellipse were varied during optimization to find the optimal ellipse.The optimization resulted in grain geometry having minimum level of Inner bore hoop strain without violating the preset limits of burning perimeter.The von mises strain at grain inner bore was also reduced in resultant grain.
- solid propellant grain /
- star grain /
- viscoelastic analysis /
- structure optimization /
- sub-problem approximation

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参考文献(12)

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[2]	Brooks W T.Solid propellant grain design and internal ballistics.NASA SP-8076,1972.
[3]	Chyuan S W.Nonlinear thermoviscoelastic analysis of solid propellant grains subjected to temperature loading[J].Finite Elements in Analysis and Design,2002,38(7):613-630.
[4]	Chang I S,Adams M J.Three dimensional,adaptive unstructured,mesh generation for solid propellant stress analysis.AIAA 96-3256,1996.
[5]	Milos P.Geometry optimization of star shaped propellant grain with special attention to minimization of stress and strain[J].FME Transactions,2007,35(1):35-40.
[6]	Whitehouse A,Dongug P,Mangeston J.Structural assessment of solid propellant grains.France:Neuilly-Sur-Seine,Advisory Group for Aerospace Research & Development,AGARD-AR-350,1997.
[7]	Dutch S.Mohr circles and conic sections.University of Wisconsin-Green Bay,http://www.uwgb.edu/dutchs/STRUCTGE/MOHR004.HTM,2000.
[8]	Haftka R T.Elements of structural optimization[M].3rd ed.Dordrecht,Netherlands:Kluwer Academic Publishers,1992.
[9]	Chen W,Zhang Y Z,Zhang C J,et al.Thermo-mechanical simulation and parameters optimization for beam blank continuous casting[J].Materials Science and Engineering:A,2009,499(1-2):58-63.
[10]	ZHANG Jiantao,ZHU Hua,ZHAO Chunsheng.Combined finite element analysis and subproblem approximation method for the design of ultrasonic motors[J].Sensors and Actuators-A Physical,2010,163(2):510-515.
[11]	Durelli A J,Parks V J.Photoelasticity methods to determine stresses in propellant-grain models[J].Experimental Mechanics,1965,5(2):33-45.
[12]	Fourney M E,Paramerter R R.Parametric study of rocket grain configurations by photoelastic analysis.AFSC Report No.AFRPL-TR-66-52,1966.

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Structural optimization of elliptical-tip star propellant grain using sub-problem approximation

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Structural optimization of elliptical-tip star propellant grain using sub-problem approximation

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Structural optimization of elliptical-tip star propellant grain using sub-problem approximation

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Structural optimization of elliptical-tip star propellant grain using sub-problem approximation

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