Optim_genesis - Finite Element Based Structural Optimization by GENESIS Outline Design approach Numerical Optimization Advantages Limitations

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Finite Element Based Structural Optimization by GENESIS
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2 Outline ! Design approach ! Numerical Optimization " Advantages " Limitations ! Structural optimization in GENESIS ! Examples " Composite panel design optimization subject to crack propagation constraint " High Speed Civil Transport Wing Problem ! Optimization Errors
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3 Design Approach ! Defined design goal " Minimum weight design: Given load, required strength ! Analyze proposed design, for acceptability ! Change one or more design variables to see if any design improvement can be obtained. ! OK, when the design is a function of only a few variables ! More systematic approach needed: Numerical optimization
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4 Numerical Optimization Advantages (Vanderplaats) ! A major advantage is the reduction in design time – this is especially true when the same computer program can be applied to many design projects. ! Optimization provides a systematic design procedure. ! We can deal with a wide variety of design variables and constraints which are difficult to visualize using graphical or tabular methods. ! Optimization requires a minimal amount of human- machine interaction.
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5 ! Computational time increases as the number of design variables increases. If one wishes to consider all possible design variables, the cost of automated design is often prohibitive. ! It can seldom be guaranteed that the optimization
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This note was uploaded on 06/06/2011 for the course EAS 4240 taught by Professor Peterifju during the Spring '08 term at University of Florida.

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Optim_genesis - Finite Element Based Structural Optimization by GENESIS Outline Design approach Numerical Optimization Advantages Limitations

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