Force Analysis of an Anchored Inshore Pipeline

Zhang, S.; Liu, L., and Zhang, Q., 2015. Force analysis of anchored inshore pipeline.

This paper mainly analyzes the optimal anchorage length of a straight-laid inshore pipeline. To begin with, several ways of how to fix a pipe are ticked off, and the way with discontinuous anchor is chosen for the specific analysis. Mathematical model is built to analyze the stress state of the pipeline, which is fixed with the screw anchor, and the main failure mode of pipeline-excessive-yield-failure mode-is checked; thus we gain the maximum anchorage distance of the pipeline. To get a more exact result, a finite element model of the pipeline is built. With the software ANSYS, the model is analyzed under wave conditions. The results reveal that the maximum anchorage distance differ in different determinants, namely distance, stress and strain; the stress of the pipeline first exceeds the allowable range when anchorage distance increases.