Аннотация. Для расчета характеристик распределенного волноводного гасителя гидродинамического шума необходимо знание величины модуля объемной упругости материала «металлическая резина» (МР) и резины с наполнителем из металлических шариков, заполняющим пространство в гасителе между податливой резиновой стенкой и жестким корпусом. В работе рассмотрен расчетноэкспериментальный метод определения модуля объемной упругости образцов МР и всего материала в волноводном гасителе. Ключевые слова: металлическая резина, гидрод инамический шум, волноводный гаситель, модуль объемной упругости, частотный диапазон.
Aluminum alloys continue to be among the promising materials for manufacture of drill pipes and risers for deepwater and ultra-deepwater environment. Steel tool-joints attached to aluminum alloy pipes increase the number of make-ups and break-outs. Currently, aluminum drill pipes (ADP) are assembled by “cold” or “hot” methods. By the first method, the pin and box are screwed on the pipe with a “sufficiently” high specified make-up torque. By the second method, the pin and box of the tool joint are heated and screwed on the ends of the pipe without effort. After cooling, the shrinkage of the tool joint units creates a reliable permanent threaded “pipe – tool joint” connection. The first method is easier than the second one; however the comparative strength of these ADP connections has not been enough clear. The paper presents the results of comparative strength analysis of both types of connection after assembly at applying tensile load and alternating bending load. The theoretical aspect of the study includes a detailed FEA of “hot” and “cold” assembly connections at applying tensile load and alternating bending load with SCF evaluation. The experimental data are presented as the results of tensile testing of small-scale specimens, removed from different aluminum pipe sections that were heated during “hot” assembly. Finally, full-scale specimens of both types of connections were tested for tensile capacity and fatigue. The comparative strength of both types of connections is concluded.
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