Thesis (Ph. D.)--University of Michigan, 1929. / Ohio State University studies. "Graduate school series." "Selected bibliography": p. 275-278. "Table of cases cited": p. 279-284.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1963. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (p. 188-199).

Thesis (M. Arch.)--University of Detroit Mercy, 2006. / Includes bibliographical references (p. 112).

Inaug.-diss.--Bern.

Thesis (M.S.)--University of Wisconsin--Madison, 1964. / eContent provider-neutral record in process. Description based on print version record. Essay on selected sources: leaves 103-106.

Thesis (M.S.)--University of Wisconsin--Madison, 1935. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

No description available.

The most important areas of interest concerning air cored linear machines (ACLM), their design, development and application to guided ground transportation are presented. A description of the origins of high speed guided ground transportation (HSGGT) is given which covers tracked air cushion vehicle and linear induction motor development, as well as the electromagnetic and electrodynamic systems of levitation. ACLM began as the favoured propulsion option for the electrodynamic system, and the machine characteristics of the linear synchronous motor (LSM) are discussed with optimization techniques given for choice of wavelength. Stress factors for rectangular coils with tight corner radii can be calculated using a circular coil equivalent. The linear commutator motor (LCM) provides a means of achieving high local track power density without degrading overall machine performance. Several forms are examined and the trade off and comparison with LSM made. The system comparison of the electrodynamic and electromagnetic systems (EDS and EMS) of magnetic levitation indicates that specifying Just lift to drag ratio and specific energy Intensity is an insufficient base. Comparison is made of the German EMS and EDS designs, together with a comparison of other groups' EDS vehicles. The German EDS design is found to be heavily penalised by excessive low speed suspension weight. Several variations of a new type of ACLM using on board flux pumping are proposed. The advantages are that a passive track structure is possible, and a cryogenically cooled winding can be used as a cost effective alternative to a superconducting coll. Application of ACLM to propulsion of advanced duorail vehicles is set out together with the possibility of speed extension with reduced track wear and Initial capital coat, as well as reduced manning and maintenance cost. An Advanced Passenger Train with LSM would appear to be a feasible option for future transport needs, and extension to a low speed urban vehicle using for example liquid nitrogen cooled pool boiling coils would similarly present a low cost system. An indexed bibliography containing over 400 HSGGT references is included, with a bias to EDS and ACLM.

No description available.

Ground vibration from trains is an increasingly important environmental problem. This study investigates the various excitation mechanisms of ground vibration. An existing semi-analytical model, TGV, which considers both the quasi-static excitation due to moving axle loads and the dynamic excitation due to vertical rail irregularities, has been validated by an extensive measurement campaign. This involved the determination of soil properties at two sites with soft clay soil. These were found to exhibit an inversion of the wave speed profile. Good agreement was found between measurements and predictions of vibration due to train pass-bys. The relative importance of the dynamic and quasi-static excitation mechanisms has been investigated for a range of conditions including changes to track and vehicle parameters. The dynamic excitation mechanism is found to dominate the results above about 10 Hz and at all frequencies for distances beyond 10 m from the track. In order to study other excitation mechanisms a new hybrid model has been developed. This combines a wheel/track interaction model working in the time-spatial domain and an axisymmetric layered ground model working in the wave number-frequency domain. In the time domain model a ‘circular’ track is introduced to allow longer responses to be calculated. The model is then validated by comparison with the existing TGV model. A reasonable agreement is found. The hybrid model has then been used to investigate the relative importance of quasi-static loads, dynamic loads and some other excitation mechanisms for trains running on the ground. The sleeper-passing effect is investigated for both constant and variable sleeper spacing but it is found to give much lower responses than those due to roughness. Variable ballast stiffness is also investigated and found not to be significant. Impact forces caused by the passage of wheels over dipped welds and stepped joints are found to generate ground responses that are considerably larger than roughness excitation in the region close to these track defects. However the response decays more rapidly with distance than that due to roughness.