Research will involve designing and performing studies of the time- and frequency-domain response of both simple and complex mechanical systems to high-amplitude, short duration impulsive loads. The studies are encouraged to incorporate all aspects of structural dynamics research: experimentation, analysis, and simulation. Opportunities exist to study one or more of the following: (1) direct simulation and/or experimental validation of transient time- and frequency-domain system response (using such methods as modal analysis and joint time-frequency analysis); (2) estimation of the dynamic state of the system using model-based estimation techniques; (3) exploration of frequency-domain spectral constitutive modeling of materials and structures; (4) development of reduced-order models of nonlinear response of mechanical systems, including such techniques as spectral element methods; (5) development of novel experimental testing methods for evaluating the shock-survivability and response of materials, sensors, electronics, and mechanical interfaces; (6) development of methods and metrics to characterize the internal mechanical environment of a complex electromechanical system under impulsive loading; (7) modeling and design of highly-coupled experiments (i.e., design of experiments), which could include multiphase physics (e.g., blast-driven impact); and (8) development of innovative methods for increasing computational efficiency and accuracy of transient dynamic simulations, with specific focus on propagation through interfaces with parametric variance (i.e., uncertainty in interface properties).

 

key words

Structural dynamics; Transient modeling; Joint time-frequency analysis; Shock; Vibration; Nonlinear dynamics; Impact experiments; Design of experiments; Model-based estimation; Dynamic state estimation; Dynamics simulation; Mechanical wave propagation; Reduced-order modeling;

Citizenship:  Open to U.S. citizens

Level:  Open to Postdoctoral and Senior applicants