Our software technology directly benefits national security, the public’s health and safety and advances in computer hardware. And we’re continuing to build on that foundation.

David Vaughan is a key member of the Weidlinger Applied Science practice. He primarily focuses on the development and application of computational methods for simulating large scale wave propagation and structure-media interaction problems as well as the transfer of high fidelity modeling concepts to fast-running engineering models. With more than 40 years of experience, David is an innovator in software development and is largely responsible for the firm’s reputation as a leader in the field.

High Fidelity Simulation Software
David is the primary architect and designer of Weidlinger’s FLEX family of simulation programs, which he began in 1981. These high-technology programs are licensed commercially and support the firm’s applied science and investigations projects as well as its protective design services. They represent the best-in-class in their respective fields: NLFlex for blast and impact response of structures, PZFlex for electro-mechanical/piezoelectric device modeling and EMFlex for electromagnetic wave applications. NLFlex was used to perform Weidlinger’s award-winning analysis of the World Trade Center collapses, and it currently supports projects of national priority for the Department of Defense and the Department of Homeland Security. PZFlex is acclaimed by medical diagnostic device manufacturers around the world.

Tools for Progressive Collapse
David has also led efforts to improve progressive collapse models for buildings, developing innovative high fidelity and rapid assessment simulation tools and testing methods. This included the first-ever progressive collapse test conducted in a centrifuge. The centrifuge provided properly scaled gravitational forces on a subscale reinforced concrete multistory building. Explosive removal of several support columns resulted in partial collapse of the structure. These types of tests provide valuable data for validating simulation models.

Outside of Work
David and his wife, Jenny, have five grown children and nine grandchildren living in the U.S. and New Zealand. They spend time together in New Zealand each year, enjoying the local lifestyle. In his free time, David keeps abreast of evolving technologies, such as developments in drones, computer software and mobile devices.

Expertise
• Computational structural dynamics
• Multi-physics software technology
• Progressive collapse analysis
• Blast modeling
• Soil-structure interaction
• Fast running engineering models for blast effects