Luo-Kareem Paper — 2022 ASCE J. James R. Croes Medal

April 25, 2022

ASCE announced that the 2022 ASCE J. James R. Croes Medal is awarded to Xihaier Luo and Ahsan Kareem for their paper titled “Dynamic Mode Decomposition of Random Pressure Fields over Bluff Bodies,” published in the Journal of Engineering Mechanics, April 2021.

Xihaier Luo is a research associate at Brookhaven National Laboratory and a graduate of the University of Notre Dame. Ahsan Kareem is a co-PI at the NSF NHERI SimCenter, leading wind and water hazard simulations, in addition to being the Robert M. Moran Professor of Engineering in the Department of Civil & Environmental Engineering & Earth Sciences at the University of Notre Dame.

Kareem comments that “this paper introduces dynamic mode decomposition (DMD) for analyzing dynamical systems. DMD, like other traditional tools such as Proper Orthogonal Decomposition (POD), reduces the dimensionality of a random field, such as wind-induced pressures around buildings. However, DMD also computes a set of dynamic system modes and frequencies and adds an important feature of dynamic system temporal evolution. Consider the following analogy to better understand the distinction between POD and DMD: POD is a tool for image processing analysis, whereas DMD is a tool for video processing.

“The DMD modes can record the evolution of aerodynamic features such as vortices and other energetic flow structures that cause damage to the building envelope. It is a useful tool for advancing wind-resistant design in extreme winds and other applications that go beyond wind to other natural hazards.”

Access the paper from the ASCE library.

Citation: Luo X., and Kareem A. (2021). Dynamic Mode Decomposition of Random Pressure Fields over Bluff Bodies. Journal of Engineering Mechanics, ASCE, 147(4), 04021007,