We provide specialized structural dynamics analysis and consulting services for other structural engineering firms, aerospace engineering companies, and mechanical system design companies that do not have in-house structural dynamics expertise. Examples of our services include:
We served as the structural dynamics analysis consultants for a Large Observation Wheel project. Two large tuned-mass dampers are incorporated into the A-frame supports to provide wind-induced structural load mitigation under storm conditions and improved comfort for the occupants under normal operating-wind conditions. As the dynamics consultant, we provided input to the TMD specification and motion predictions of the Wheel and the TMDs.
An aerospace test facility was experiencing what they thought was vortex-induced motion of a 150-foot tall circular tower and requested a concept design for a tuned-mass damper to provide base bending moment mitigation. We analyzed force pin data recorded during two of the events provided by the client and reviewed historical weather conditions for those days. Our analysis confirmed that wind speeds and air temperatures were consistent with turbulent vortex street formation and produced a vortex shedding frequency that matched the fundamental resonance frequency of the tower. We developed a concept design for a tuned-mass damper that would reduce the base bending moment by about 90%.
The Naval Nuclear Laboratory tests centrifugal pump and pipe loop systems that are part of naval vessel nuclear propulsion systems. They are upgrading their test facility and sponsored a concept design competition to provide concept designs for a platform that would provide significant vibration isolation from ground-borne vibration and be stiff enough to minimize the possibility of pump-excited resonant modes of the platform. Our concept design was selected as the go-forward concept. The final design must provide the ground-borne vibration isolation, critical frequency avoidance, and accommodate significant thermal expansion of the pipe loop during operation while satisfying the stress and strength requirements of the ASME B31.1 Power Piping Code.