 analysi low-aspect-ratio aircraft structur analysi low-aspect-ratio aircraft structur method present analysi complex low- aspect-ratio aircraft structur method provid arbitrari extern load gener respect orient structur member permit arbitrari boundari condit purpos analysi structur ideal network flexur member interconnect torsion box method set linear equat express boundari condit member deflect equat equilibrium requir slope-compat relationship term deflect intern forc solut deflect intern forc form product invers structur matrix column matrix load function second method condit boundari assembl column matrix transfer step by-step fashion entir structur opposit boundari transfer accomplish success multipl squar matric compos independ transfer rang final oper invers small matrix solut unknown boundari condit comparison theoret experiment data electr-analog solut favor 