Orcaflex contact stiffness values
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The analytic catenary solver can now be used for line step 1 statics. Selecting quick statics here restores the behaviour prior to version 11.0a. The choice of line reset representation on the general data form determines how line shapes should be calculated in reset state. This permits effects such as seabed contact and buoyancy to be seen in the 3D view before the static calculation has been performed. The analytic catenary solver can now be used to determine the shape of lines in reset state. Before this time, any warnings associated with the BEM method failing to converge will not be reported. New turbine results are available: blade deflections, tower and line clearances, rotor aerodynamic load and power, rotor aerodynamic thrust and power coefficients, rotor swept area, skew angle, disc averaged wind velocity and extra BEM output.Ī convergence monitoring start time can now be specified. To model structural damping on turbine blades, Rayleigh damping coefficients can now be specified. Previously, slave objects were always connected to the turbine hub. Slave objects can now be connected to either the turbine hub or to a given blade at a specified arc length. Results that have changed include the node angular motions and the blade load components reported at end A. Blade node results that were reported with respect to the node B-frame have changed to be reported using this new frame. This frame accounts for the user-specified structural twist at the node arc length and is used for drawing and reporting. Turbine blade nodes now carry a new frame known as the node structural frame.
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Existing external function pitch controllers will need to be adapted in order to take advantage of individual pitch control. If individual pitch control mode is selected then each blade has an independent pitch value.
![orcaflex contact stiffness values orcaflex contact stiffness values](https://www.researchgate.net/profile/Menglan-Duan/publication/287745370/figure/fig8/AS:1088647549976598@1636565210267/Configuration-result-comparison-between-DRICAS-and-Orcaflex.jpg)
If common pitch control mode is selected, then all blades share the same pitch angle, as was the behaviour in previous versions. This feature is enabled by the new data item pitch control mode. This accounts for the time that the turbine's wake takes to adjust to a change of flow conditions.īlade pitch angle can now be controlled for individual blades. The Øye dynamic inflow model can optionally be used when calculating the rotor aerodynamic loading. Based on potential theory, these models allow the tower's influence on the undisturbed wind field, due to the so-called tower dam effect, to be accounted for. The turbine can now be associated with a tower by choosing from two tower influence models. We are sure that users will have many other feature requests, and we look forward to receiving such feedback and prioritising future developments. We will address that in the next development cycle. We are aware that, for large meshes, performance can be greatly improved using iterative solvers. Perhaps most significantly, the program currently uses direct matrix solvers. This is the first release of OrcaWave and so there is still some desirable functionality that we have not yet had time to implement.
ORCAFLEX CONTACT STIFFNESS VALUES FULL
Full details of OrcaWave's capabilities can be found in the documentation. Hydrodynamic data from OrcaWave output files can be imported seamlessly by OrcaFlex. OrcaWave can perform single body and multibody analyses, and first and second order calculations. If you have a licence of OrcaFlex, then you have access to OrcaWave. OrcaWave is licensed as part of the OrcaFlex product. OrcaWave is a diffraction analysis program which calculates loading and response for wet bodies due to surface water waves via potential flow theory. In order to use OrcaFlex version 11.0, or later, with Distributed OrcaFlex you must be using Distributed OrcaFlex 6.1 or later. A number of changes have been made to the structure and layout of the installation directory which have an impact on Distributed OrcaFlex.