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Air bending processes are analyzed in JCO forming for X80 welded pipe using plane strain element by the Finite Element Analysis Software Abaqus. In bending deformation, the springback is various for different punch radius and the final pipe geometries obtained are influenced. The residual stress and equivalent plastic strain distributions after unloading for five punch radius is discussed using static...
In this paper, the engine optimal matching is done to improve the efficiency of supercharging lean burn LPG engines by optimizing the compression ratio and the distribution phase of camshaft. The gas consumption and emissions of LPG engine are reduced. A whole engine model is set up on one-dimensional simulation software. The optimal compression ratio is determined by comparing the simulation computed...
Multi-step bending is the key manufacturing technology of large-diameter straight seam submerged arc weld (LSAW) pipes JCO. The aim of this search is to predict the precise final geometry of the pipe after forming because the considerable elastic recovery during unloading leading to springback affects the precision in dimension. In this study the JCO forming process for X-80 pipe with wall thickness...
In order to eliminate the disadvantage of traditional substructure mobility analysis method, a kind of object-oriented knowledge representation model of power flow in vibration isolation system is proposed in this paper. The model can deal with the static and dynamic knowledge of power flow in isolation analysis effectively. In the model, foundation, machine and floating raft are three types of the...
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