Applied Structural Dynamics

Applied Structural Dynamics (ASD), Inc., (est. Feb. 1998) is a team of highly innovative and experienced engineers that specialize in design, analysis, and testing of complex structural/mechanical systems. These systems include launch vehicles, spacecraft, payloads, pressurized modules, launch vehicle umbilicals, launch vehicle platforms, turbomachinery, and other structural/mechanical systems. ASD operates in the aerospace, defense, civil, power, and biomedical industries and is engaged in conceptual and detailed design, finite element modeling, transient coupled loads analysis, multibody coupled loads analysis, random/vibro-acoustic and shock prediction analyses, rotordynamics, and testing.

ASD is also engaged in advanced methods and commercial software development. ASD engineers are the developers of multiple advanced methods utilized by NASA, DoD, contractors, and commercial software. These include the Henkel-Mar pad separation, the nonlinear contact/friction algorithms for transient and random environments, the Generalized Mass Attenuation (GMA) and force limiting methodology for random vibrations (co-developed with NASA/JPL), the Norton-Thevenin Fast coupled loads analysis (co-developed with NASA/Goddard), Accelerance Decoupling (co-developed with NASA/Goddard), the Transient Finite Energy Shock Predictor (co-developed with NASA/Goddard), the Multibody frame work for nonlinear coupled loads analysis, and the Residual Flexibility Mixed Boundary dynamic reduction method (the default in MSC/NASTRAN).

ASD has the distinction of being selected by NASA and Lockheed Martin to conduct Space Shuttle/payloads mission critical nonlinear transient coupled loads analyses (CLAs) for payload flight certification (2005 – 2011, final flight). ASD was also selected by the NASA Engineering and Safety Center (NESC) to execute nonlinear CLAs for the Space Launch System (SLS). This work included utilizing ASD's Multibody CLA capabilities to simulate the SLS umbilical hose dynamics/separation during the vehicle's pad separation event to determine clearances. ASD has received numerous awards and distinctions from NASA for its nonlinear CLA work including the prestigious NASA Engineering Excellence Award.

Expertise

ASD's expertise along with our advanced and efficient processes allow us to develop state-of-the-art engineering products and design solutions for our customers at significant discounts and with expedited schedule. Our expertise includes:

• Structural Dynamics
• Linear Coupled Loads Analysis
• Nonlinear Coupled Loads Analysis
• Random Vibration Analysis
• Rotordynamics Analysis
• Finite Element Modeling
• Testing
• Design of Isolation Systems
• And more!