Manuel Herduin [IMG] Thesis Multidirectional loading...

Manuel Herduin


Thesis
Multidirectional loading characterisation on a shared suction anchor for Wave Energy Converters

Summary
"This project will develop the science required to predict the geotechnical behaviour of suction caissons (upturned buckets that are sucked into the seabed) under multidirectional alternate cyclic loading. It will also establish the viability of mooring multiple floating renewable energy devices to a single caisson by developing analysis methods for the installation, operation and decommissioning of the anchor. The research aims are to:

Aim 1. Measure and quantify the behaviour of a suction caisson subjected to monotonic loading in alternating directions.

Aim 2. Measure and quantify the behaviour of a suction caisson subjected to periodic phases of multidirectional cyclic loading.

Aim 3. Qualify the suction caisson and mooring line anchoring system as an efficient, practicable solution for anchor sharing of large arrays of ocean energy devices. This will require models for the whole life cycle.

Aim 4. Integrate outcomes from Aims 1, 2 and 3 into a robust framework to design suction caissons for multidirectional alternate cyclic loading.

Why my research is important
This project will establish a geotechnical design framework for shared anchoring systems subjected to multidirectional cyclic loading. This will enable the design of large arrays of floating wind turbines and floating wave energy converters, generating radical cost savings and unlocking Australia’s renewable ocean energy resources."


According to his profile, Manuel Herduin commenced his research under the supervision of Professor Gaudin in August 2015. The submission date for his thesis is in 2018.

If that is the case, CWE should by then have demonstrated Ceto 6 either in Perth or Cornwall.

For the demonstration, I assume they will use the same type of foundation used for Ceto 5, (ie drilled and grouted pylons), until a new system is perfected.

If all goes to plan, by the end of 2018 Ceto 6 will have been proven and construction of a commercial size array ready to commence.

Alternate foundation systems are said to be the best way in which to reduce the cost in commercialising wave energy (foundations can make up to 35% of total cost).

Success here would be a major step forward.