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Abstract: To overcome difficulty of high computational cost in difference sensitivity analysis, efficient derivatives are obtained using “approximate-difference” strategy based on combined approximation method. Combined approximation method is fit for reanalysis in both temperature and thermo-structural analysis
models, and accurate sensitivity is obtained under small disturbance
which is verified by numerical examples. Virtual displacements of
control point are selected as design variables, shape optimization model
of thermo-structural steady response is established. Some numerical
examples are provided and results are discussed. Results are shown to demonstrate the feasibility and validity of the proposed method and model.
Key words: Thermal response Thermal stress
Shape optimization Sensitivity analysis
Approximate reanalysis
Combined approximations
CLC No: TH122
国防重点预研基金资助项目(40402010105). Received 20060704, received in revised form 20070329
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