Analysis of crash response of a typical blended wing body aircraft under various emergency landing attitudes
XIE Jiang
CHENG Siwuwei
HE Junlong
SHI Xiaopeng
Abstract：[Objective]In order to investigate the structural response of a blended-wing-body aircraft under various emergency landing attitudes,a full-scale finite element model of the BWB aircraft was established,encompassing the main structural components of the aircraft,including frames,stringers,cargo floor,cabin floor,support column,and fuselage ribs,among others.[Methods]Numerical simulation studies were conducted under pitch attitudes of 0°,+3°,+6°,+9°,and+12°,with a focus on analyzing the preservation of cabin space,acceleration loads at the seat track locations,and the impact characteristics of the main load-bearing structures under different conditions.[Results]The results indicate that the cabin area of the lifting body fuselage remains essentially intact under various conditions,with the survivable space maintained;the blended-wing-body configuration aircraft generates higher acceleration loads during crashes,and the crash attitude significantly affects the loads experienced by occupants.Touching down first in the non-pressurized tail area can effectively reduce the acceleration loads experienced by passengers during a crash event.Acceleration loads near the central aisle are greater than those on the sides of the fuselage.In the field of structural energy absorption,the frame is the primary energy-absorbing structure,followed by the cargo floor and its supporting components.
Keywords：Blended wing bodyCrashworthinessFailure modeAcceleration responseNumerical simulation
Publication Date：2026-07-31
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：10( 166-175 )