Research On The Examination Method Of Structural Dynamic Model About Passenger Vehicle's Inner-swing Door

Structural dynamic analysis in automobile engineering has two basic methods—finite element analysis method and test model analysis technology, they all have their own advantage and defect, recently, some put forward to combine finite element analysis method and test model analysis technology, take length mutually and mend short, in order to analysis and calculate the dynamical character of the structure. It is in this texts that this thesis uses mode shape of test model and calculating to draw the systematic dynamic information, when the mode frequencies have been corresponded which receives from testing and computational mathematical model, set up the relevant analytical rneihod suitable for dynamical analysis, and go on the relevant analysis between the finite element calculating model and test model.We are used to check finite element dynamic model with mode frequencies, and only use mode shape picture to contrast mode shape simply. We don't use a quantity to measure mode shape. It is because when we use mode shape contrasting we must expand test model's degrees 01 curtail calculating model's degrees first, then we can make mode relevant analysis. But there have difficulty in degrees expanding or curtailment.In this thesis, the author foims a matrix to estimate the model's relevant degree, tiased on test model's degrees matching with calculating model's degrees, the author puts forward a method to compute the model's relevant degree. It can not only compute one mode's relevant out also analysis the relevant degree of whole model. Then the author realized the relevant analysis of models. This paper aim is making the model relevant degree becomirg a quantity and using the quantity to checking model. By unceasing the parameters of the model to improve the model's dynamical characteristic we can get a calculating model which is the most according with the fact.