Umbra, an Object-Oriented Simulation and Integration Framework

This paper describes a modeling, simulation, and integration framework developed at Sandia National Laboratories with support from ORION International Technologies, Inc. This framework, called Umbra, increases the efficiency for developing new applications and for integrating new and/or existing applications. A process for rapidly and effectively developing new modeling and simulation applications to reduce time and cost is discussed. This goal is achieved by using a time-tested object-oriented modular design, object-oriented design patterns and the implementation of a novel construct called World Modules. Umbra developers have embraced axiomatic design as a guiding principle. This paper describes the approach used to develop Umbra, lists representative projects, and describes specific examples illustrating how quickly and efficiently complex systems representations can be built in Umbra.