Numerical Simulation And Experimental Study Of Impact Load On Tensioned Membrane Structure

The membrane structure was composed of membrane and the support frame.The membrane will deform greatly when it is subjected to an impact loading.In this paper these problems were studied systematically and the main research process and the results were as follows:1.The deformation response of an orthotropic rectangular membrane structure under the impaction of a small ball was studied by finite element numerical simulation method.The numerical simulation results show that when the other constraints are not changed,as the pretension of the rectangular film increases,the shorter the time for the film surface to reach the maximum amplitude,the maximum deformation of the film surface will also decrease.Under the same pretension condition,the larger the incident velocity of the small ball,the larger the maximum displacement of the film deformation.2.An experimental scheme for the response of an orthotropic rectangular film to an impact load was designed.The impact load was applied to the membrane with a small ball shouted from a spring gun,the deformation of the film is measured using a non-contact laser measurement method and a dynamic signal test system.The test results showed that: the maximum displacement in the collision point decreased with the increase of the pretension of the membrane and increase with the speed of the small ball.The experimental results were close to the numerical simulation results,which verifies the correctness of the numerical simulation method and the factor for the errors between the in results from the experiment and the numerical simulation were discussed.3.The response of membrane structure with saddle shape and the planer shape under the impact load were simulated respectively.The results show that the saddle-shaped membrane structure has less deformation when subjected to the same impact load at different locations of the film than the flat membrane structure,and the saddle-shaped membrane structure has the ability to resist deformation caused by impact loads than the flat membrane structure.It is proved that the saddle membrane structure is superior to the planar membrane structure in resisting deformation caused by impact load.