Dynamic Simulation And Fatigue Life Prediction Of Gliding Frame

As people’s living standards improve,more and more people like to experience thrilling and exciting amusement projects,making the amusement industry develop rapidly.There are many rides in the playground,and the track gliding project is one of them.The project is characterized by thrill and excitement,attracting many tourists to experience.Track gliding projects are divided into indoor gliding and outdoor gliding.Tourists hold the handles,which are connected to the gliders.The gliders are stuck on the track through the wheel,and the last person glides from the top.In recent years,the gliders have run The occurrence of damage to life and property due to damage in the process occurs from time to time,which is essential for the fatigue life estimation of the glider and reasonable arrangement of maintenance.This article takes glider as the research object,determines the dangerous part of fatigue through dynamic simulation analysis,compiles the stress spectrum of dangerous point,predicts the fatigue life of glider,and provides reference for the use and maintenance of glider.First,reasonably simplify the parts and components,establish a three-dimensional model of the track and glider,and then initially analyze the running state of the glider,and then use the finite element analysis software to conduct a modal analysis of the glider frame to understand the various vibration modes of the glider and make Modal neutral file for glider.Import the assembly model of the glider and track into ADAMS,replace the corresponding rigid body part with the modal neutral file of the glider,establish a rigid-flexible coupling dynamic simulation model,set the relevant parameters and working conditions,and perform simulation analysis.The stress cloud image obtained by processing can understand the magnitude,location and time of the extreme value of stress of glider.Select 7 fatigue danger points in the stress concentration area,including 4 points in the welded part and 3 points on the base metal in the non-welded part to evaluate the fatigue life.Extract the stress time history curve at the fatigue danger point,extract the peak and valley values and wavelet compression of the stress data,count the circulation of the rain flow,and synthesize the rain flow matrix under different working conditions according to the proportion of the number of tourists experience The synthesis matrix is extrapolated by a non-parametric method to obtain a 64x64 level two-dimensional stress spectrum of the full life cycle.The variable mean method is used to convert the two-dimensional stress spectrum of the fatigue dangerous point of the welded part into a one-dimensional stress spectrum,and the equal life method is used to convert the two-dimensional stress spectrum of the non-welded part fatigue dangerous point into a one-dimensional stress spectrum,so that the next step of fatigue Life expectancy.The existing fatigue strength theory is used to estimate the fatigue life of dangerous points on the welding and non-welding parts of the glider.For the welding part,the life estimation is carried out by using the BS standard combined with the stress spectrum.Non-welded parts are evaluated for life using the nominal stress method.Comparing the calculation results of this article with the actual use of the playground,the accuracy of the method used in this article is verified.In addition,it also provides some reference opinions on glider design,manufacturing and maintenance.