Development of OPASS Code for Dynamic Simulation Mooring Lines in Contact with Seabed

The mooring system of a floating platform keeps the structure in the desired sea location and can also contribute to the system stability. It consists of several cables attached to the platform in a point called fairlead, and with the lower ends anchored to the seabed. A new code for the dynamic simulation of mooring lines on wind turbines based on Finite Elements is presented. The code, called OPASS (Offshore Platform Anchoring System Simulator), includes effects as inertia, added mass, hydrodynamic drag, structural damping and contact and friction with seabed. The equations of motion are integrated in time using the Runge-Kutta-Nystr ¿om scheme. It has been loosely coupled with the FAST code for the simulation of offshore floating wind turbine dynamics. OPASS has been verified with semi-empirical expressions and with other codes as 3DFloat and SIMO-RIFLEX. Simulations prescribing a harmonic horizontal motion with 5m amplitude at the fairlead with different periods were performed with the objective of evaluating the importance of dynamic effects. In these simulations, dynamic effects on the lines are more important at moderate line tensions and can increase the tension up to 60% in comparison with the static tension. For taut lines dynamic effects are smaller and the quasi-static model could be an acceptable approximation. A comparison with FAST quasi-static mooring lines model has been also performed for a spar-buoy floating platform. The dynamic model predicts an important increase (30%) in the tension peaks of the cable with respect to the quasi-static approach and the consideration of dynamic effects can also have influence on the global motions of the platform. In particular, the quasi-static model can underestimate the surge damping

Proyecto PARTIC : cliqueando vamos avanzando

El trabajo no ha sido publicado. El resumen está basado en una ficha elaborada por los autores o el responsableSe ha realizado en el colegio San José-Niño Jesús, centro al que pertenecen el coordinador y los 27 profesores de educación infantil y primaria implicados en el proyecto. Los objetivos de este son mejorar el nivel de implantación de las TIC en la practica habitual del proceso de enseñanza y aprendizaje, llevar la informática al aula, llevar a la clase a la sala de informática, y mejorar la formación del profesorado en TIC. Para estos se han seguido tres pasos: formación del profesorado en TIC; llevar las TIC al proyecto curricular; manejo de aplicaciones CLIC. Se ha realizado una encuesta a los 21 profesores asistentes a la última sesión, de la que cabe destacar que considera como 'muy bien' la 'elevación el nivel de usuario en TIC', y el trabajo con las 'actividades CLIC'; además se cree que favorece el aprendizaje de los alumnos.Consejería de Educación y Juventud de CantabriaES

Delaying surgery for patients with a previous SARS-CoV-2 infection

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