Methods for determining the centre of effort

AuthorSearch for:
TypeTechnical Report
Series titleLaboratory Memorandum
Subjectcentre of effort; six component balance; line of action
AbstractIt is often helpful to calculate a centre of effort to help interpret load data gathered from physical model testing. The centre of effort is taken to be a point where a load consisting of a force and the smallest possible moment must be located if it is to be equivalent to the actual loading on the model. The mathematical equations used to locate the centre of effort cannot specify a point, but do define a line; this line is the line of action of the equivalent load. In an attempt to hold to the traditional view that the centre of effort is a point, a method for selecting a point along the line of action as a point centre of effort is given. The method compares the lines of action from similar test to test is minimized. In some cases, the method can be sensitive to experimental error. The method was applied to data gathered in a test of the hydrodynamic loads acting on a component of a minesweeping system. This application of the method helped to determine what circumstances cause the method to become overly sensitive to experimental error. Two other methods of specifying a point instead of a line were suggested. They set arbitrary restrictions on the location of the centre of effort, and are expected to be roughly as sensitive to error as the method developed here.
Publication date
PublisherNational Research Council Canada. Institute for Marine Dynamics
PlaceSt. John's, NL
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NRC number5270
NPARC number8896043
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Record identifier1b1829fd-c53a-4793-a9c7-b57c78161c98
Record created2009-04-22
Record modified2016-10-03
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