Abstract
Suspension pipe bridge is the key part of oil and gas pipeline system. Liquid loading during the pigging process will cause strong dynamic load of impact, thus the stability of structure will be destroyed. Paper establishes the pipeline pigging model suffered by the stress, analyzes the stress and vibration equation of the pigging pipeline. With the dynamic finite element simulation by the method of variable load, paper analyzes the vibration numeric of the pigging pipeline when the pig goes through the pipeline. The analysis of this paper provides the technical support and theoretical basis for pigging work.
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