Dynamic Analysis And Experimental Research Of Rapidly Assembled Helipad

With the development of the times and the improvement of people’s living standards,disasters also occur frequently.Aviation emergency rescue is playing an increasingly important role as an effective means of rescue.However,the complex geographic environment has brought many problems to the helicopter’s take-off and landing.How to ensure the helicopter’s safe take-off and landing has become an urgent problem to be solved.It is urgent to study a highly reliable apron that can be quickly laid.At the same time,dynamic analysis and experimental research are carried out to ensure the reliability of the apron.First of all,according to the design requirements,design the improved connection and splicing scheme of rapidly assembled helipad.After that,based on the response surface method,multi-objective optimization of the size of the final plan is carried out,and a feasible solution with minimum strain and stress as the goal is sought.With reference to various splicing methods,the idea of staggered splicing was proposed to improve the overall rigidity of the rapidly assembled helipad.Secondly,based on the explicit dynamic analysis method,the landing position and landing environment design conditions of skid and wheeled helicopters are simulated and analyzed.Relying on ANSYS Workbench and Ls-prepost to complete the helicopter landing dynamics model,using LS-DYNA to achieve the solution,obtain the results,and verify the guarantee capability of the rapidly assembled helipad against different geological and landing conditions,and the reliability of the bolt connection method.Then,analyze the helicopter landing problem based on Sim Mechanics.According to the related research of viscoelastic mechanics,the helicopter landing problem is simplified to vibration problem,and its inherent characteristics and maximum deformation are analyzed and studied.Simulate two soil materials,concrete and gravel ground,and perform vibration simulation analysis on them.Finally,three kinds of field environment are simulated in the laboratory for loading tests.The experimental plan is designed to carry out a heavy load test on the rapidly assembled helipad prototype.Test the load-bearing capacity of the apron deck and connecting components,and the deformation of the apron deck.Analyze the test results and verify them through static simulation,discuss the relationship between deck deformation and loading size,foundation conditions,loading test location,and whether there is a deck.The helicopter flight test was carried out,and the assembly experiment was carried out on the concrete and grass ground.Completed the multi-environment take-off and landing application test of the helicopter to verify the feasibility of the rapidly assembled helipad.