TY - GEN
T1 - Multidisciplinary design optimization of stratospheric airship
AU - Alam, Mohammad Irfan
PY - 2016
Y1 - 2016
N2 - This paper describes a methodology for shape optimization of the envelope of an airship for long endurance missions at stratospheric altitudes. Gertler Series-58 shape generation scheme is selected for optimization studies, in which the envelope shape is driven by four shape parameters and fineness ratio. The values of these parameters are obtained by satisfying the condition of airship geometry. Effect of operational parameters viz. location, altitude, wind etc. on sizing of airship are discussed. For multidisciplinary design optimization (MDO) A composite objective function is formulated which incorporates the value of envelope volumetric drag coefficient (CDV), circumferential hoop stress (σhoop) on the envelope, area of solar array and envelope surface area. The optimization is carried out using an open-source implementation of a robust stochastic algorithm, viz., Genetic Algorithm.
AB - This paper describes a methodology for shape optimization of the envelope of an airship for long endurance missions at stratospheric altitudes. Gertler Series-58 shape generation scheme is selected for optimization studies, in which the envelope shape is driven by four shape parameters and fineness ratio. The values of these parameters are obtained by satisfying the condition of airship geometry. Effect of operational parameters viz. location, altitude, wind etc. on sizing of airship are discussed. For multidisciplinary design optimization (MDO) A composite objective function is formulated which incorporates the value of envelope volumetric drag coefficient (CDV), circumferential hoop stress (σhoop) on the envelope, area of solar array and envelope surface area. The optimization is carried out using an open-source implementation of a robust stochastic algorithm, viz., Genetic Algorithm.
KW - Genetic algorithm
KW - High altitude airship
KW - MDO
KW - Sensitivity analyses
UR - https://www.scopus.com/pages/publications/85013679162
M3 - Conference contribution
AN - SCOPUS:85013679162
T3 - 30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016
BT - 30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016
PB - International Council of the Aeronautical Sciences
T2 - 30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016
Y2 - 25 September 2016 through 30 September 2016
ER -