The availability of tools for safety evaluation of a pressure liner is a relevant issue in both structural and hydraulic engineering. A suitable design of a steel liner may involve a significant reduction in the investment cost of a hydropower plant and may also ensure its future integrity, avoiding prolonged stoppages in the operation stage. First, a review of the design methods for steel pressure liners is outlined and certain key aspects for the critical buckling load assessment are pointed out. Second, a numerical modeling and analysis procedure of a steel pressure liner is presented. The methodology is based on 3D nonlinear finite element modeling procedures, involving both liner constraining and the effect of stiffeners. In addition, both large displacements and a surrounding elastic medium are assumed in the model. Besides, some types of geometric imperfections such as weld-induced ones, initial gap, ovality, and wall-thickness loss due to corrosion are taken into account in this work. Finally, some conclusions are drawn regarding the role of imperfections in the calculated critical pressure of a steel liner.
Consideration of Geometric Imperfections in Three-Dimensional Finite Element Model Analysis of Stiffened Steel Liners Subjected to External Pressure
Escuela de Ingenieros de Caminos,
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received March 4, 2014; final manuscript received October 21, 2014; published online February 20, 2015. Assoc. Editor: Spyros A. Karamanos.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Valdeolivas, J. L. G., and Mosquera, J. C. (August 1, 2015). "Consideration of Geometric Imperfections in Three-Dimensional Finite Element Model Analysis of Stiffened Steel Liners Subjected to External Pressure." ASME. J. Pressure Vessel Technol. August 2015; 137(4): 041202. https://doi.org/10.1115/1.4028893
Download citation file:
- Ris (Zotero)
- Reference Manager