Airships, as a kind of suspending aircraft, have been widely used in the civil and military fields. The airship gasbag is a typical of membrane structure. In the cases of pitching and steady swerve, gasbag deformation conform the deformation rule of thin plate. During the analysis of aero craft structures, software of international popularity and authorization, such as NASTRAN、 ANSYS、 ALGOR、 COSMOSM、 ADINA, have the abilities of solving nonlinear problem.The paper's engineering background was Non-rigid airs...