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The measurement of vertical and lateral forces on electric overhead cranes during operation.Engelbrecht, S.W.H. 20 January 2015 (has links)
This dissertation is a practical investigation into the
magnitude of the vertical and lateral forces exerted,
by electric overhead travelling cranes, on their
supporting structures during operation.
The method of measuring the forces and the equipment
used for the actual measurements are discussed, as well
as the equipment used for the processing of the
recoided date.
The forces measured during the experiments, executed in
two stages namely controlled conditions and normal
operation, are discussed under the headings of vertical
forces due to the weight of the crane and lead handled,
and the lateral forces due to cross travel movement,
skewing of the crane and acceleration/deceleration of
the crane.
It is shown that the vertical misalignment of the
rails, together with the stiffness of the crane
structure, has a large influence on the magnitude of
the vertical forces.
Drive wheel slip, tested under controlled conditions on
two E-type cranes, proved to cause high lateral forces.
Comparisons are made with the existing Codes of
Practice as well as with the theoretical models
of crane behaviour.
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Stability analysis of mobile boom cranesRauch, Andreas. January 2008 (has links)
Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2009. / Committee Chair: William Singhose; Committee Member: Nader Sadegh; Committee Member: Wayne J. Book. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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The design of a tower crane attachmentWellens, Edgar A. January 1964 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1964. / eContent provider-neutral record in process. Description based on print version record. Bibliography: l. 68.
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Study of crane boom deflectionsBarp, Bruno. January 1963 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1963. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaf 57).
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The crane problem : scheduling with sequence-dependent set-up and processing times.Clark, David, Dominic January 1998 (has links)
A research project submitted to the Faculty of Science, University of the
Witwatersrand, Johannesburg, in partial fulfillment of the requirements for the
degree of Master of Science. / The problem of scheduling with sequence-dependent set-up times in a
dynamic environment is investigated by studying how various dispatching rules
perform when used to schedule two cranes. Motivated by a practical
scheduling problem, the effect on production by delays due to the conflicts that
result between cranes is examined. The problem is formalized, and it is shown
that it can be classified as a problem of scheduling with both sequence-dependent
set-up and processing times. The effectiveness of simple
dispatching procedures that are used in machine scheduling and for the control
of automated guided vehicles is studied, using a simulation of a crane aisle
with jobs arriving dynamically. In addition, a dispatching rule, which explicitly
uses information regarding the state of the second crane, is examined. The
simulation results confirm the non-dominance of certain dispatching
procedures, and show how performance is improved as the rules are provided
more information regarding the state of the scheduling environment. It is shown
that when there are sequence-dependent processing times, a scheduling
heuristic that uses global information does significantly better than more
commonly used local heuristics. / AC2017
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Über Schwerlast-Drehkrane im Werft- und HafenverkehrSchürmann, Eugen. January 1904 (has links)
Thesis (doctoral)--Königliche Techische Hochschule zu Berlin, 1904. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
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Experimental design and results of 2D dynamic damping of payload motion for cranes /Ramesh, Periyakulam S., January 1994 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 98-110). Also available via the Internet.
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Optimal control of a high speed overhead crane including hoistingMehta, Urmish R. January 1992 (has links)
Thesis (M.S.)--Ohio University, August, 1992. / Title from PDF t.p.
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Über Schwerlast-Drehkrane im Werft- und HafenverkehrSchürmann, Eugen. January 1904 (has links)
Thesis (doctoral)--Königliche Techische Hochschule zu Berlin, 1904. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
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Anti-sway control of a construction crane modeled as a two-dimensional pendulum /Ruddy, Thomas A., January 1994 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 85-87). Also available via the Internet.
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