Measurement of Polyethylene Pipe Parameters During an Ocean Deployment. Final Report

摘要

Data were acquired on the behavior of the polyethylene upwelling pipe for the GRI/DOE Marine Biomass Biological Test Farm during several phases of pipe assembly and ocean towing and deployment. The pipe is nominally 28 in O.D., 1400 feet long with wall thicknesses of 0.9 and 1.75 inches. The entire effort was conducted over a period of six weeks and was implemented on a strictly non-interference basis with the main Biomass Program. Three types of data were acquired during shore and ocean based operations conducted in the southern California area during the period from 15 September-27 September 1978. Axial strain data were obtained from two rows of 15 transducers each, separated circumferentially by 90 exp 0 and distributed along the entire length of the pipe. Photographic data were also acquired from helicopter, boat and shore stationed cameras. The third type of data acquired were lowering line tension measurements made during the second successful deployment operation. (ERA citation 05:028672)