Dissertation > Excellent graduate degree dissertation topics show

Based collaborative optimization and single discipline feasible method for reliability design optimization

Author: YuHui
Tutor: HuangHongZhong
School: University of Electronic Science and Technology
Course: Precision instruments and machinery
Keywords: Reliability Based Design Optimization (RBDO) Reliability Based Multi-disciplinary Design Optimization (RBMDO) Reliability analysis Collaborative Optimization Individual Discipline Feasible
CLC: TB114.3
Type: Master's thesis
Year: 2008
Downloads: 280
Quote: 1
Read: Download Dissertation

Abstract


Design optimization is a crucial element in engineering design. Most modern engineering design problems are related to large scale, complex and multi-disciplinary systems. Therefore, a very active research area called Multidisciplinary Design Optimization (MDO) has been developed specifically for the problem of this kind. The main idea of MDO is to consider the coupling effects among different disciplinary and reach the optimized solution through interactions and collaborations among all areas. However, in engineering practice, uncertainties associated with many important engineering factors, such as applied loadings, material properties, component geometry and other environmental factors, must be considered when we are formulating an optimization model and solving for the optimal solution. Hence, it is very desirable to include uncertainties into MDO for realistic engineering problems.Conventionally, a“safety factor”approach has been used. Although this method can simplify the design process and reduce the computational cost, it sometimes arrives at an over-designed solution that compromised the design performance for design safety. To this end, we must develop a new optimization method that is based on reliability so that the optimized solution will satisfy the required levels of uncertainty.There are a few important research topics in this thesis:(1) Reliability Based Single-disciplinary Design Optimization:Based on the concept of Collaborative Optimization (CO), single disciplinary reliability based design optimization problems with multiple constraints are converted into a series of RBDO problems with single constraint and the original objective function is optimized at the upper level. A cantilever design example is presented to demonstrate the effectiveness of this approach.(2) Reliability analysis under Multi-disciplinary systems:Because Reliability analysis is very expensive during Reliability Based Multi-disciplinary Design Optimization (RBMDO), a method using CO is proposed. Numerical examples are included to illustrate its efficiency. (3) Reliability Based Multi-disciplinary Design Optimization:Due to the complexity of multi-disciplinary systems, when consider reliability in MDO, the problem becomes very complicated. We incorporated Sequential Optimization and Reliability Assessment (SORA) into RBMDO in order to improve its computational efficiency.

Related Dissertations

  1. The mechanical hydraulic Confined Piston Engine multidisciplinary collaborative optimization design support environmental research,TP311.52
  2. Ozone disinfection equipment reliability analysis and design,TH771.4
  3. EMU bogie bearing reliability analysis and fault diagnosis technology research,U269
  4. Reliability Analysis for the Equal Vavle Used in Shanghai Metro Line 1 DA01 Vehicles,U270.35
  5. The Stability Study and Reliability Analysis of Rock Slope,P642
  6. Studies on Corrosion Mechanism and Anti-Corrosion Methods in the First Atmospheric and Vacuum Distillation Unit of Karamay Petrochemical Company,TE986
  7. Research of Multi-Objective Tolerance Design on LED Street Lamp Driver,TM923.34
  8. Reliability Analysis and Fatigue Analysis for CNG Storage Gas Pressure Vessel Using Finite Element Method,TH49
  9. Questionnaire for Psychological flexibility and its preliminary application,B841.7
  10. Changsha Electric Power Bureau employees empirical studies of organizational commitment and job performance relationship,F426.61;F224
  11. Reliability Analysis of Uncertain Hysteretic Systems,TB114.3
  12. Large thin-walled transport fixture design method,TG75
  13. Research on the Reliability Design and Method System of Shaft Lining Through Deep Surface Soil,TD262
  14. Study of Longshou Mine Deep Piping Reliability and Expansion Technique Project,TD853.34
  15. Research on Working Reliability of 5KW Off-grid Small Wind Driven Generator,TM315
  16. Consider the effects of human error reliability analysis Falsework,TU755.2
  17. Drilling fluid solid control system research and Reliability Analysis,TE921
  18. Study on Human Reliability Analysis Method under the Influence of Organizational Factors,C936
  19. Research on Collaborative Optimization of Engineering Technology and Equipment Technology,TU71
  20. Study on Electrical Distribution Network Planning Optimization Based on Reliability of Cost-Benefit Analysis,TM715
  21. Study on Urban Distribution Network Planning of Zhangjiagang,TM727.2

CLC: > Industrial Technology > General industrial technology > Engineering and basic science > Engineering Mathematics > The application of probability theory, mathematical statistics > Reliability theory
© 2012 www.DissertationTopic.Net  Mobile