Shock and Vibration / 2019 / Article / Tab 4

Research Article

An Alternative Solution of Train-Track Dynamic Interaction

Table 4

Evaluations of computational accuracy and calculation time of different methods.

MethodComputational accuracyCalculation time
DescriptionLevelDescriptionLevel

ATo write vibration equations, complicated structures are simplified in large extent; moreover, inapparent mistakes in the written codes are difficult to find outMiddleCompiled programs are highly efficient in solving TTIFast
BRail random irregularity is hard to be accurately consideredLowComputational efficiency is low due to the implicit integration algorithm in FE softwareSlow
CNonlinear characteristics of tracks and foundations cannot be consideredMiddleAdopting the algorithm of multibody dynamics and mode superposition method or modal synthesis method, computational efficiency can be ensuredMiddle
DDue to the changes of mass stiffness matrices, nonlinear properties of substructures cannot be consideredMiddleCompiled programs are highly efficient in solving TTIFast
Proposed methodDisadvantages of the above methods are settledHighHybrid explicit-implicit integration method is adopted to efficiently solve TTIMiddle

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