Several recent model tests of tension leg platforms (TLP's) are described. Some new and challenging design problems which are unique to tension leg platforms have become the focal points of these tests. These have required the development of new modeling techniques and methods of data processing. A general review of TLP characteristics and modeling requirements is presented along with a description of recent test programs and modeling techniques. Research areas of particular interest in the recent tests are described and some recommendations for future research are made.

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Capabilities for generating waves in model basins have advanced from unidirectional regular waves to unidirectional random waves and recently in several facilities to multidirectional regular and random waves. The history of this development is reviewed briefly. The motivation for conducting model tests in multidirectional waves is discussed along with some sample applications. The principle for generating multidirectional waves is outlined and the facilities for performing this function at Offshore Technology Corporation are described.