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Efficient Multidisciplinary Analysis and Optimization of Hypersonic Vehicles Using Multi-Fidelity Surrogate Models
Efficient Multidisciplinary Analysis and Optimization of Hypersonic Vehicles Using Multi-F...
Efficient Multidisciplinary Analysis and Optimization of Hypersonic Vehicles Using Multi-Fidelity Surrogate Models

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211153050
ISBN  
9798346380337
DDC  
790
저자명  
Needels, Jacob Troy.
서명/저자  
Efficient Multidisciplinary Analysis and Optimization of Hypersonic Vehicles Using Multi-Fidelity Surrogate Models
발행사항  
[Sl] : Stanford University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
123 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-05, Section: B.
주기사항  
Advisor: Alonso, Juan.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2024.
초록/해제  
요약The trade between computational cost and model accuracy is a fundamental challenge in engineering design: models of higher fidelity (i.e. physical accuracy) typically require additional cost. Resource constraints fundamentally limit the amount of high-fidelity information available to engineers during design cycles, often requiring decisions to be made with incomplete information. Simply substituting in simplified, low-fidelity tools may guide the system to a non-optimal or infeasible configuration, introducing risk in the design process.The design of hypersonic glide vehicles exemplifies these challenges. The challenges involved with experimental testing place a strong reliance on numerical models for design insight, but com- putational fluid dynamics simulations of aerodynamic and aerothermal conditions, capturing all relevant physics, are computationally expensive. Furthermore, the tight coupling between trajec- tory performance and vehicle configuration necessitates analysis at a wide range of flight conditions, exacerbating computational cost by requiring a large number of simulations. This thesis examines the use of multi-fidelity modeling strategies to reduce the cost of multidisciplinary analysis and op- timization of hypersonic vehicles while retaining a level of accuracy in results consistent with the highest level of fidelity.A multi-fidelity framework for aerodynamic and aerothermal modeling of hypersonic vehicles is introduced and applied to the simulation of a hypersonic glide vehicle. An integrated, low- fidelity modeling framework for parametric geometries, SHARPE, is developed, providing comparable predictions to the SU2 computational fluid dynamics solver for hypersonic conditions, but with significantly reduced computational cost. Predictions from these tools are used to construct surrogate models using multi-fidelity Gaussian process regression. The resulting surrogate models are then used in the trajectory simulation of a notional hypersonic glide vehicle, and the impact of surrogate accuracy on trajectory performance is examined.Given the observation that realized trajectories comprise a small subset of the vehicle state space, strategies for using trajectory information to improve sampling efficiency are explored. A methodology for sampling based on sequentially refined estimates of the true trajectory is developed, and shown to reduce range prediction error relative to a uniform sampling policy. The sensitivity of trajectory quantities to aerodynamic parameters is efficiently computed using the adjoint equations of the vehicle dynamics. A sampling algorithm combining trajectory and sensitivity information is presented and applied to aerodynamic surrogate models, resulting in consistently more accurate range predictions than other policies examined.Finally, multi-fidelity aerodynamic and aerothermal surrogate models trained over a joint ve- hicle design-state-control space are integrated into a simple hypersonic glide vehicle optimization framework. Multi-fidelity predictions of range performance and thermal protection system sizing are shown to be substantially modified from low-fidelity alone predictions by employing a small amount of multi-fidelity data.
일반주제명  
Design optimization
일반주제명  
Heat
일반주제명  
Reynolds number
일반주제명  
Geometry
일반주제명  
Normal distribution
일반주제명  
Altitude
일반주제명  
Design
일반주제명  
Fluid mechanics
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 86-05B.
전자적 위치 및 접속  
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MARC

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■020    ▼a9798346380337
■035    ▼a(MiAaPQ)AAI31643309
■035    ▼a(MiAaPQ)Stanfordfw426xc4025
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a790
■1001  ▼aNeedels,  Jacob  Troy.
■24510▼aEfficient  Multidisciplinary  Analysis  and  Optimization  of  Hypersonic  Vehicles  Using  Multi-Fidelity  Surrogate  Models
■260    ▼a[Sl]▼bStanford  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a123  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-05,  Section:  B.
■500    ▼aAdvisor:  Alonso,  Juan.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2024.
■520    ▼aThe  trade  between  computational  cost  and  model  accuracy  is  a  fundamental  challenge  in  engineering  design:  models  of  higher  fidelity  (i.e.  physical  accuracy)  typically  require  additional  cost.  Resource  constraints  fundamentally  limit  the  amount  of  high-fidelity  information  available  to  engineers  during  design  cycles,  often  requiring  decisions  to  be  made  with  incomplete  information.  Simply  substituting  in  simplified,  low-fidelity  tools  may  guide  the  system  to  a  non-optimal  or  infeasible  configuration,  introducing  risk  in  the  design  process.The  design  of  hypersonic  glide  vehicles  exemplifies  these  challenges.  The  challenges  involved  with  experimental  testing  place  a  strong  reliance  on  numerical  models  for  design  insight,  but  com-  putational  fluid  dynamics  simulations  of  aerodynamic  and  aerothermal  conditions,  capturing  all  relevant  physics,  are  computationally  expensive.  Furthermore,  the  tight  coupling  between  trajec-  tory  performance  and  vehicle  configuration  necessitates  analysis  at  a  wide  range  of  flight  conditions,  exacerbating  computational  cost  by  requiring  a  large  number  of  simulations.  This  thesis  examines  the  use  of  multi-fidelity  modeling  strategies  to  reduce  the  cost  of  multidisciplinary  analysis  and  op-  timization  of  hypersonic  vehicles  while  retaining  a  level  of  accuracy  in  results  consistent  with  the  highest  level  of  fidelity.A  multi-fidelity  framework  for  aerodynamic  and  aerothermal  modeling  of  hypersonic  vehicles  is  introduced  and  applied  to  the  simulation  of  a  hypersonic  glide  vehicle.  An  integrated,  low-  fidelity  modeling  framework  for  parametric  geometries,  SHARPE,  is  developed,  providing  comparable  predictions  to  the  SU2  computational  fluid  dynamics  solver  for  hypersonic  conditions,  but  with  significantly  reduced  computational  cost.  Predictions  from  these  tools  are  used  to  construct  surrogate  models  using  multi-fidelity  Gaussian  process  regression.  The  resulting  surrogate  models  are  then  used  in  the  trajectory  simulation  of  a  notional  hypersonic  glide  vehicle,  and  the  impact  of  surrogate  accuracy  on  trajectory  performance  is  examined.Given  the  observation  that  realized  trajectories  comprise  a  small  subset  of  the  vehicle  state  space,  strategies  for  using  trajectory  information  to  improve  sampling  efficiency  are  explored.  A  methodology  for  sampling  based  on  sequentially  refined  estimates  of  the  true  trajectory  is  developed,  and  shown  to  reduce  range  prediction  error  relative  to  a  uniform  sampling  policy.  The  sensitivity  of  trajectory  quantities  to  aerodynamic  parameters  is  efficiently  computed  using  the  adjoint  equations  of  the  vehicle  dynamics.  A  sampling  algorithm  combining  trajectory  and  sensitivity  information  is  presented  and  applied  to  aerodynamic  surrogate  models,  resulting  in  consistently  more  accurate  range  predictions  than  other  policies  examined.Finally,  multi-fidelity  aerodynamic  and  aerothermal  surrogate  models  trained  over  a  joint  ve-  hicle  design-state-control  space  are  integrated  into  a  simple  hypersonic  glide  vehicle  optimization  framework.  Multi-fidelity  predictions  of  range  performance  and  thermal  protection  system  sizing  are  shown  to  be  substantially  modified  from  low-fidelity  alone  predictions  by  employing  a  small  amount  of  multi-fidelity  data.
■590    ▼aSchool  code:  0212.
■650  4▼aDesign  optimization
■650  4▼aHeat
■650  4▼aReynolds  number
■650  4▼aGeometry
■650  4▼aNormal  distribution
■650  4▼aAltitude
■650  4▼aDesign
■650  4▼aFluid  mechanics
■690    ▼a0389
■690    ▼a0204
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g86-05B.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164813▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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