We are sure that many of our clients, like us, are experiencing significant changes in their day-to-day lives in these difficult times.
Those of you who have been in touch with us recently will already have realised that we are now almost exclusively home-working. This means that we are no longer offering face-to-face training or customer visits. However, we are continuing to offer our normal technical support service. We are not currently able to offer technical support over the telephone, but would be more than happy to respond to any queries through email.
We are also still able to ship out dongles for those setting up new OrcaFlex licenses and apply dongle updates (e.g. activating or de-activating a lease, licence transfer, or adding new licences). However, to limit the requirement for a staff presence in our office, this service will only be available on Mondays and Wednesdays. We appreciate that this may be slightly inconvenient in some circumstances and ask for your patience and understanding.
Finally, we hope that you, and your friends and families, stay safe and healthy, wherever you are in the world
Back in November 2019, we released OrcaFlex version 11.0. This included the initial release of our diffraction analysis program OrcaWave.
At the time of release, we had performed extensive validation of OrcaWave, by comparing its results to theoretical predictions where possible, and also by comparing results from OrcaWave to results from Wamit. We have now written up this validation work and published it in a comprehensive validation report.
The report (including all input files and meshes) can be downloaded from the validation page.
Back in 2016 we published An introduction to the Python interface to OrcaFlex. This is a high level overview and introduction to the Python interface that attempts to fill in some of the gaps not covered by the reference documentation.
We have just released an updated and extended version of this document. The document now covers some functionality that has been added to OrcaFlex since its original release in 2016, specifically frequency domain and diffraction. Additionally, we have added sections covering extreme value statistics and fatigue analysis.
The updated version of the document can be downloaded from our documentation page.
We also offer a single day introductory workshop devoted entirely to the Python interface to OrcaFlex.
We have just released a minor upgrade to OrcaFlex, version 11.0c. Version 11.0c introduces some minor new functionality and fixes a number of bugs. Full details of the changes are described in the documentation:
We recommend that all users of 11.0 upgrade to 11.0c.
A patch to upgrade from 11.0a or 11.0b to 11.0c can be downloaded here. The full installation program can also be downloaded from your Orcina download page. Please contact us if you do not have the link to your Orcina download page.
Microsoft support for Windows 7 ended on the 14th January 2020. As a consequence of this, we are no longer supporting our software products on Windows 7. Our internal IT policies mean that we no longer have any Windows 7 machines on which to test our products, and are therefore unable to officially support our products on Windows 7.
Note that this change does not mean that our products will stop working on Windows 7 in the near future. Existing versions of our software that are known to work on Windows 7 will of course continue to do so.
Future releases of our products are also likely to continue to work perfectly well on Windows 7. Our underlying code base is very stable and we rarely make changes that lead to incompatibilities with operating system versions. However, because we are no longer able to test our products on Windows 7, there may come a time when we release new versions of our software that are not compatible with Windows 7.
We have just released a minor upgrade to OrcaFlex, version 11.0b. Version 11.0b introduces some minor new functionality and fixes a number of bugs. Full details of the changes are described in the documentation:
The bug fixes are particularly important for OrcaWave and so we especially recommend that you install this upgrade if you are using OrcaWave.
A patch to upgrade from 11.0a to 11.0b can be downloaded here. The full installation program can also be downloaded from your Orcina download page. Please contact us if you do not have the link to your Orcina download page.
We have just released a minor upgrade, version 10.3e, which introduces support for Python 3.8, and fixes a number of bugs. Full details of the changes are described in the documentation. We recommend that users of 10.3 upgrade to 10.3e.
A patch to upgrade from earlier versions of 10.3 can be downloaded here. The full installation program can also be downloaded from your download page. Please contact us if you do not have the link to your download page.
Some OrcaFlex users have reported program crashes when trying to execute embedded Python code. These crashes causes OrcaFlex to close without reporting any error message.
If Python scripts are used for OrcaFlex post calculation actions, user defined results or external functions, OrcaFlex must launch a Python interpreter to run the input scripts. We refer to this mode of operation as running embedded Python.
Some clients make use of Anaconda products as their installed Python. However, Anaconda’s packaging of Python 3.7 fails to initialise when OrcaFlex wants to run some embedded Python code, leading to a program crash.
This issue can usually be resolved by creating a new environment variable, PYTHONHOME, and setting its value to your Anaconda Python installation directory.
You can find the environment variables by starting with the System Properties window:
and add PYTHONHOME by selecting New… from the User Environment Variables list:
OrcaFlex version 11.0 provides the Python home directory information to embedded Python automatically. Updating OrcaFlex to version 11.0 will therefore resolve the issue without requiring you to modify environment variables.
We would like to thank all of our users who brought the problem to our attention, and also helped us to find the solution!
We are very pleased to announce the release of OrcaFlex version 11.0. The software was finalised and built on 28th November. All clients with up-to-date MUS contracts should receive, by e-mail, instructions on how to download the new version.
Version 11.0 introduces much new functionality, including:
- Diffraction analysis
- Enhanced wind turbine modelling
- Wind drag loading for 6D buoys
- Enhanced wind specification
- Disturbed sea state results for vessels
- New results variables
- Hysteretic constraint stiffness
- Enhancements for 3D views
- Software licensing
These are the most significant developments, in our opinion. As always there are more enhancements that are not listed here. All new features are fully documented in the what’s new topic for 11.0.
Continue reading “OrcaFlex 11.0 released”
OrcaFlex 10.3 introduced the turbine object, used to model horizontal axis wind turbines.
A key issue for wind turbine analysis is the modelling of the generator and blade control systems. Because these control systems are typically proprietary, OrcaFlex does not offer any built-in control system functionality. Rather, the user must specify the control systems through external functions.
When we released 10.3d, we updated the documentation to include some example external function controllers. The pertinent help topics are:
These documentation topics contain links to the controller examples which can also be downloaded directly.
Other useful sources of information for turbine modelling: