Kenneth B. Morrill, P.E., G.E.
Mr. Morrill has over 24 years of experience in the analysis of aerospace and civil structures subjected to static and dynamic loads. Most of this experience involves finite element analysis of the response of structures to seismic ground motions, aero and blast loads.
His expertise in earthquake engineering includes damage surveys of reinforced concrete structures involved in major earthquakes, development of seismic criteria, and analytical simulations of seismic response of surface and underground structures using both finite element and classical hand analysis methods. Mr. Morrill has analyzed and evaluated the response of a wide variety of structures including underground subway tunnels, subway stations, hospital buildings, bridge overcrossings and underground pipelines.
Mr. Morrill has extensive experience as a strength analyst working on the DELTA III and TITAN IV launch vehicles. He was responsible for analysis of the composite interstage and payload fairing using the latest versions of MSC/NASTRAN and PATRAN. Stress and buckling analyses (including geometric nonlinearities) were used to evaluate margins of safety for stress, shear crimping and general instability.
His experience with blast and shock includes development of design methodologies for hardened tunnels and performance of numerous nonlinear finite element tunnel response calculations for both pretest predictions and posttest analysis of test data. He has over 15 years of experience involving large-scale underground field test programs at the Nevada Test Site. Mr. Morrill was Stress and Thermal Analysis Manager for the Delay Barrier System (BDS) that was developed for the USAF Rail Garrison missile basing system. The dynamic analyses performed included nonlinear direct integration using enforced displacement time histories and modal analysis using both shock spectra and random vibration power spectral density (PSD) input. The type of load conditions analyzed involved nuclear and conventional weapon effects, as well as transportation shock and vibration environments where structural fatigue is an important consideration. Thermal analyses performed included heat transfer within the railcar and the determination of thermal operating environments of electronic equipment. Both ADINA and ANSYS finite element codes were used in this effort.