Influence of the key parameters of suspended structures on the inherent frequency of oil and gas pipelines

摘要: Abstract Inherent frequency is an important parameter that reflects the dynamic stability of fluid-conveying pipelines. In engineering applications, inherent pipelines usually increased to improve their stability. The flow velocity and pressure oil gas cannot be altered freely. Among all parameters affect suspended pipelines, flexural stiffness stiffening girder, tensile force cable system, pipe-axial precompression are most important. Revealing influence laws these three could provide theoretical support for designs. this paper, a crossing pipeline project was simplified as Hetenyi׳s elastic foundation model. girder system were G K , respectively. regularities T on analyzed. According numerical simulation results, ranks in descending order importance . During construction, should much possible. If needs improved while have already been built up, it firstly considered increase values higher than zero if On basis, further improvement achieve better result.