Methods for Solution of Dynamic Contact Problems.
Abstract
Methods for treating dynamic soil-structure interaction in large three-dimensional, nonlinear finite element settings are first compared. Frequency domain methods, nonlinear material models without contact models, and constraint methods such as Lagrange multiplier and penalty methods are included in the discussion. Nonlinear material models possessing tension cut-off capability would seem to most easily satisfy the soil-structure interaction requirement. However, such a formulation does not provide for more general requirements involving contact conditions of structural components. Thus the report focuses on constraint-type methods in addressing the spatial aspects of the problem of implementing dynamic contact behavior into large-scale finite element calculations for civil-structural systems. Of the constraint-type methods, one in particular known as the augmented Lagrangian formulation, is deemed most appropriate to the specified class of problems. This method is a combination of the Lagrange multiplier and penalty formulations and aims at retaining only the best characteristics of both methods.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1985
- Accession Number
- ADA163553
Entities
People
- Robert L. Taylor