Distributed Substructure Testing Method With Finite Element Softwares

As an effective combination of physical testing, numerical simulation and networktechnology, distributed substructure testing is developing rapidly in recent years, it isdrawing great attention in the field of hybrid simulation. This paper proposes adistributed substructure testing system by involving finite element software as tools ofnumerical simulation, which significantly improve the efficiency of numericalcalculation. Corresponding iteration methods are also proposed to solve the boundarycompatibility problem. The main contents are summarized as follows:The software system of distributed substructure testing is built. With simple andexplicit I/O format of the substructural boundary coordinator, this system is compatiblewith different finite element software through different interface modules. The interfacemodules for ABAQUS and OpenSEES are developed in this paper.Boundary compatibility conditions consist of the force equilibrium and kineticcompatibility at the boundary. Two iterations method are proposed in order to satisfy theboundary compatibility condition, which are presented in this paper.In distributed substructure algorithm based on kinetic parameters iteration, bothexplicit and implicit integration method are available. For implicit integration method,compatibility can be satisfied with displacement, velocity or acceleration iteration. Asfor in explicit integration method, only velocity and acceleration iterations can be usedto achieve compatibility. Numerical simulation results demonstrate excellent accuracyfor both methods.Distributed substructure algorithm based on force iteration requires thecompatibility of one of the three motion parameters. The other two parameter willachieve compatibilities automaticlly after iteration. Numerical simulation results showthe excellent accuracy of force based method.