Flexible riser is a class of flexible pipes which is used to connect subsea pipelines to floating offshore installations, such as FPSOs (floating production/storage/off-loading unit) and SS (semisubmersible) platforms, in oil and gas production. Flexible risers are multilayered pipes typically comprising an inner flexible metal carcass surrounded by polymer layers and spiral wound steel ligamen...

− This paper describes the principle of harmonic excitation of strain gages in bridge configuration. This system’s properties are mathematically determined and measurements are conducted with commutated excitation, AC and harmonic excitation with and without filtering. The possibility of increasing the accuracy of output bridge voltage measurement by using harmonic excitation is shown.

First posted February 28, 2023 For additional information, contact: Director, Oklahoma-Texas Water Science Center U.S. Geological Survey 1505 Ferguson Lane Austin, TX 78754–4501 Contact Pubs Warehouse Floods are one of the most frequent and expensive natural disasters that occur across United States. Rapid, high-water events in local areas––flash floods––are especially difficult for emergency m...