Open post doc position at NGI

Apply here: https://candidate.hr-manager.net/ApplicationInit.aspx?cid=388&ProjectId=175674&MediaId=5

For more info, contact: Hans Petter Jostad Hans.Petter.Jostad@ngi.no

Are you interested in developing a soil-structure interaction framework for mooring lines and anchors subjected to cyclic loading? Do you want to be a part of ground-breaking research contributing to the next generation of floating structures for renewable energy (wind and solar), aquaculture and coastal infrastructure?

We are seeking a post-doctoral researcher interested in developing improved design methods for anchoring systems of novel floating structures. The overarching objective of the position is to be part of the development of new procedures for:

  1. predicting the potential development of seabed trenches caused by repeated motion between the mooring line and the soil
  2. calculation of holding capacity of shared anchors subjected to complex multidirectional cyclic load histories.

The research is part of SFI BLUES, a research-based innovation centre funded by the Research Council of Norway. The centre shall enable Norwegian industry to create new types of floating structures which satisfy the needs and requirements from renewable energy, aquaculture and coastal infrastructure. The post-doctoral position will be based at the Norwegian Geotechnical Institute (NGI) headquarters in Oslo and is available for 12 months. The position is planned to start in the first half of 2022.

NGI is involved in SFI BLUES as a research partner – contributing with geotechnical expertise – and manages Work Package 7 (WP7) on mooring and anchors. WP7 aims to develop solutions to ensure that novel floating structures are kept at the location in a safe, sustainable, and cost-efficient manner. This will be achieved by developing analysis tools and design methods, facilitating innovation and optimisation in the industry, and by developing guidelines and effective monitoring systems to improve the robustness of the mooring and anchor system.

Work description
The candidate is expected to focus on soil-structure-interaction of mooring lines and anchoring systems subjected to complex cyclic load histories, working within two different activities:

Development of a calculation tool for predicting the potential for creating deep trenches in clayey soils due to repeated motion between the mooring line and the soil. The displacement histories of the nodes along the anchor line/chain within the soil will be described by so-called macro-models implemented into the hydrodynamic simulation tool RIFLEX.
The degradation of the soil resistance due to both large deformations and repeated motions will be accounted for in these models. In special cases, geometrical changes due to erosion caused by the mooring line motion will be included. However, since the erosion takes place over a longer duration (several years) than the time period typically considered in a simulation (minutes or hours), the effect needs to be accounted for in a post-/pre-processing stage between the simulations.
To estimate the rate of erosion an empirical model will be developed based on results from model tests. Since no standard procedure for how to perform this type of test exist also the test program needs to be defined within this activity.
Develop a new method for calculation of holding capacity of shared anchors subjected to multi-directional cyclic load histories. The established formulation will be included into macro-models of anchors that can be used in fully integrated analyses of the floating structure and mooring system. To quantify the effect on the cyclic shear strength multi-directional simple shear tests will be performed.
The position will be supervised by Dr. Hans Petter Jostad at NGI. The candidate will be based at NGI, but will be working closely with the interdisciplinary team of researchers in BLUES, end users, engineering companies and technology providers.

Qualifications
We are looking for a candidate with:

a PhD degree within geotechnical engineering
experience with numerical modelling of soil and/or anchors subjected to cyclic loading
good knowledge in advanced constitutive modelling
skills in Python scripting and/or Fortran coding
enough theoretical and practical background to be able to plan and specify advanced model/laboratory tests
The candidate will be asked to demonstrate his/her analytical skills and ability for scientific work by a good publication record. Success in the position also requires good English communication skills, as well as ability to work as a part of a multidisciplinary research group.

Applicants currently enrolled in a PhD programme who expect to pursue the PhD degree before the date of appointment must forward documentation for the date of their final exam.

Application
Applications shall be sent electronically. You must enclose the following in the electronic application:

a cover letter (one-page) describing why your competence is relevant and your motivation for applying
curriculum vitae (CV)
transcript of records from university education
list 2-3 references and their contact information
Interviews will be performed at NGI Oslo (if COVID19 restrictions allow) or alternatively on Microsoft Teams.

Subject to compliance with the qualification criteria above, applications are welcome from citizens of any nationality, regardless of gender and ethnic origin. International applicants must also check and comply with Norwegian immigration formalities.

We offer
NGI offers an attractive salary and good benefits. Through its long and well renowned expertise and reputation, NGI offers an excellent environment for professional development in both research and consultancy in an active, inspiring and very good work environment.

You will work in close contact with researchers at NGI, SINTEF Ocean and other partners in BLUES.