کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5474220 | 1520646 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An hp-adaptive discontinuous Galerkin method for modelling snap loads in mooring cables
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی دریا (اقیانوس)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: An hp-adaptive discontinuous Galerkin method for modelling snap loads in mooring cables An hp-adaptive discontinuous Galerkin method for modelling snap loads in mooring cables](/preview/png/5474220.png)
چکیده انگلیسی
This paper focuses on modelling snap loads in mooring cables. Snap loads are a known problem for the established oil and gas industry, and they pose a major challenge to robust mooring design for the growing industry of wave energy conversion. We present a discontinuous Galerkin formulation using a local Lax-Friedrich Riemann solver to capture snap loads in mooring cables with high accuracy. An hpâadaptive scheme is used to dynamically change the mesh size h and the polynomial order p, based on the local solution quality. We implement an error indicator and a shock identifier to capture shocks with slope-limited linear elements, while using high-order Legendre polynomials for smooth solution regions. The results show exponential error convergence of order p + 1â2 for smooth solutions. Efficient and accurate computations of idealised shock waves in both linear and nonlinear materials were achieved using hpâadaptivity. Comparison with experimental data gives excellent results, including snap load propagation in a mooring chain. Application on a wave energy device using coupled simulations highlights the importance of the touch-down region in catenary moorings. We conclude that the formulation is able to handle snap loads with good accuracy, with implications for both maximum peak load and fatigue load estimates of mooring cables.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ocean Engineering - Volume 144, 1 November 2017, Pages 266-276
Journal: Ocean Engineering - Volume 144, 1 November 2017, Pages 266-276
نویسندگان
Johannes Palm, Claes Eskilsson, Lars Bergdahl,