Exactly and Easily Applying Experimental Boundary Conditions in Computational Structural Dynamics

Technical Report · Wed Sep 11 04:00:00 EDT 2019

DOI:https://doi.org/10.2172/1763230· OSTI ID:1763230

Bunting, Gregory ^[1]; Crane, Nathan K. ^[1]; Day, David M. ^[1]; Dohrmann, Clark R. ^[1]; Ferri, Brian Anthony ^[1]; Flicek, Robert C. ^[1]; Hardesty, Sean S. ^[1]; Lindsay, Payton ^[1]; Miller, Scott T. ^[1]; Munday, Lynn Brendon ^[1]; Stevens, Brian Lynn ^[1]; Walsh, Timothy F. ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Most experimental setups and environment specifications define acceleration loads on the component. However, Sierra Structural Dynamics cannot apply acceleration boundary conditions in modal transient analysis. Modal analysis of these systems and environments must be done through the application of a huge artificial force to a large fictitious point mass. Introducing a large mass into the analysis is a common source of numerical error. In this report we detail a mathematical procedure to directly apply acceleration boundary conditions in modal analyses without the requirement of adding a non-physical mass to the system. We prototype and demonstrate this procedure in Matlab and scope the work required to integrate this procedure into Sierra Structural Dynamics.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
• DOE Contract Number: AC04-94AL85000; NA0003525
• OSTI ID: 1763230
• Report Number(s): SAND--2019-10728; 679294
• Country of Publication: United States
• Language: English

Related Subjects

97 MATHEMATICS AND COMPUTING