Webinars

Get the most out of the Optum software. Sign up for one of our upcoming webinars, watch recordings of previous webinars or book a personal webinar on any topic you wish.

Upcoming

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September 15st at 1 PM CET
External webinar sponsored by Optum: Foundations for offshore wind turbines

With Dr. Britta Bienen of University of Australia.

Offshore wind farm developments are growing rapidly and entering new markets globally. The majority of offshore wind turbines (OWTs) are supported by monopiles, which are typically impact-driven into the seabed. Alternative installation and foundation solutions include vibro-driven piles and suction buckets. Irrespective of the selected solution, successful installation is critical to the in-service performance of the foundation. This requires the mechanisms to be understood in detail. The installation process itself has the potential to significantly change the soil state.

This webinar is hosted by University of Liverpool.

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Previous

Recorded
Guest-speaker: Adaptive Finite Element Methods

With Dr. Majid Nazem of RMIT University, Melbourne, Australia.

The finite element method (FEM) is the most popular computational tool for analysing the behaviour of many complex engineering problems.  The adaptive strategies have been developed to improve the accuracy as well as the efficiency of the FEM or to eliminate possible mesh distortion due to large deformations. In this webinar, Majid will present recent advances in the adaptive FEM strategies as well as their application in a wide range of problems including, but not limited to, soil-structure interaction, dynamics of two- and multi-phase media and penetration problems.

This webinar is hosted by University of Liverpool.

Recorded
Guest-speaker: Tracking time in crunchy soft media

With Professor Itai Einav of University of Sydney. It is commonly known that cereals crush under load or become soggy in fluid over time. But what happens when they are both loaded and soaked at the same time? Surprisingly, this experiment uncovers ‘ricequakes’ – the sudden collapses of columns of wetted brittle porous media that produce perpetual clicking sounds akin to a slowing metronome. To explain this phenomenon we present a simple model of capillary driven crushing steps progressing through the micro-pores.

This webinar is hosted by University of Liverpool and sponsored by Optum CE.

Recorded
Guest-speaker: Multiscale Modeling of Granular Media

Granular media are ubiquitous on the Earth and intimately related to our daily life. They are the second most processed materials (next to water) in the world. Granular media are typically porous, discrete media and exhibit intricate behavior of both solids and fluids depending on the loading conditions. Understanding of the mechanics and physics of granular media is of pivotal importance to a wide range of engineering and industrial sectors, yet it remains one of the most challenging scientific questions to be fully answered. In this talk, we introduce our continuous efforts over the past 12 years at HKUST on computational multiscale modelling of granular media towards more comprehensive and deeper understanding of granular media as an engineering science.

This webinar is hosted by University of Liverpool and sponsored by Optum CE.

Recorded
Guest-speaker: Predicting the onset & post-failure of geomaterials

Geotechnical designs often rely on traditional analytical and computational approaches which are limited to small deformation problems. While these methods of analysis provide important guidance, and have been used for the safe design of many geotechnical structures, they are unable to provide information on the failure of such structures under extreme weather or operational conditions or the risk associated with these failure modes. In this talk, Ha Bui of Monash University, Australia  will discuss recent developments in the field of computational geomechanics to predict the onset and post-failure of geomaterials with reference to geomechanics problems relating to slope stability and failure, debris flows, strain localisation/localised failure, soil-structure interaction, amongst other examples. 

This webinar is hosted by University of Liverpool and sponsored by Optum CE.

Recorded
Guest-speaker: Seabed pipe-soil interaction

We were very happy to welcome guest-speaker Joe G. Tom from University of Illinois at Urbana-Champaign to host this webinar on the topic "Seabed pipe-soil interaction". Estimating pipe-soil interaction is a key aspect for designing safe and reliable oil & gas pipelines and renewable energy cables. Accurate prediction of the resistance is important for both on-bottom and buried infrastructure. In this webinar, recent practice-driven research, which utilised OPTUM G2 to aid in predicting the available resistance, will be overviewed. These studies cover predicting the as-laid lateral resistance of pipelines, the evolving resistance of on-bottom pipelines subject to sediment transport and the upheaval resistance of buried pipelines.

Recorded
Guest-speaker: Suction pile foundation design in OPTUM G2 and OPTUM G3

It was with great pleasure, that we could once again welcome Christian Linde Olsen from Subsea 7 to host one of our webinars. Subsea 7 is a subsea engineering, construction and services company serving the offshore energy industry. Christian shows how Subsea 7 make use of the Finite Element Limit Analysis capabilities in OPTUM G3 and compares analysis results with data from a recently recovered suction pile structure. During the presentation, Christian demonstrates the advantages of performing a 3D analysis on a template with suction piles.

Recorded
Guest-speaker: Design of rock anchors for offshore applications

While grouted rock anchors are common in engineering practice, the design of groutless anchors relies on oversimplified design methods. Dr. Benjamin Cerfontaine of University of Dundee will present his use of the Optum software in his research and why limit analysis is the perfect technique to efficiently investigate the failure mechanisms of groutless anchors and identify variables that should be incorporated in more accurate design methods.

Recorded
Torsional loading effects on bearing capacity of shallow foundations in G3

In this webinar hosted by Optum co-founder Prof Kristian Krabbenhoft, we will show how OPTUM G3 can be used for evaluating the bearing capacity of shallow foundations with torsional loads. We will explore the effects of the FASD Sand model on the bearing capacity and also show how Matlab scripting can be used to effectively create failure envelopes (V-H, T-V, etc).

Download slides
Download Mathcad script G3_VT
Download Mathcad script G3_Vmax

Recorded

Guest-speaker: The use of limit analysis in tectonic studies

Below temperatures of 300 °C, at depths lesser than 10 km, rocks are frictional Coulomb materials.
Therefore, Limit Analysis offers a useful simplified theoretical approach to the study of shallow tectonic deformations.

Pr. Bertrand Maillot of Géosciences et Environnement Cergy (GEC) presents various examples of such studies in this 45 min webinar followed by a Q&A with Bertrand and the Optum CE founders.

Recorded

The bearing capacity equation and how well it fits with Optum 

A question we often get from users is why they are getting different results when using the bearing capacity equation and Optum. For some cases  the bearing capacity equations provides exact results which is very valuable for verification purposes. For most cases the bearing equation is not exact, but in fact still very precise, which makes it useful for design but also for verifications. Find out for which cases you can expect perfect agreement, and for the cases you cannot: Why and What is the difference?

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Recorded

Guest-speaker: 3D analysis in offshore geotechnics

45 min webinar hosted by guest-speaker Christian Linde Olsen from Subsea 7 followed by Q&A with Christian and the Optum CE founders. Subsea 7 is a subsea engineering, construction and services company serving the offshore energy industry. Christian will present their use of 3D analysis with 3 examples, one of which is the case study "Lessons Learned - Counter-acts Used To Install Pipelines Offshore In Very Soft Clay" and compare the results to OPTUM G3 analysis.

Recorded

How to choose the right friction angle in 3D

When doing 3D FE calculations you need to decide on which friction angle to use: Should you use the Plane Strain friction angle or the Triaxial friction angle? As the friction angle is dependent on the stress state the answer is not that easy. In OPTUM G3 we have found the solution to the problem and invite you to watch this webinar for the first-ever presentation of our new sand model.

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Recorded

Consistent undrained modelling of clays in OPTUM G2 and G3

What to do when Tresca is a poor fit? As you might have discovered, real life clay has more to it than a single value. In OPTUM G2 and G3 all scenarios are easily handled using our material model called AUS – Anisotropic Undrained Shear – which – despite it’s name – actually handles both isotropic as well as anisotropic clays. Please join and learn how the AUS material model can be used for both Limit Analysis calculations, as well as for determining load-displacement curve.

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Recorded

Slope stability in OPTUM G2

In OPTUM G2, factors of safety are computed using Strength Reduction Finite Element Limit Analysis (SR-FELA). Besides short calculation times, SR-FELA also provides the possibility to calculate rigorous upper and lower bounds on the true factor of safety. In practice, this means that the true factor of safety can be determined within a negligible tolerance in a matter of seconds.

Recorded

Introduction to OPTUM G3

OPTUM G3 is a unique Finite Element program allowing engineers to design practical everyday geotechnical problems in 3D with never before seen speed, accuracy, simplicity and pure enjoyment! Classic FE in a completely new framework.

Recorded

Retaining walls in OPTUM G2

Retaining walls come in a wide variety of types including mass gravity walls, mechanically stabilized earth walls, gabion walls and sheet pile walls. All of these can be analysed efficiently and accurately using OPTUM G2. The unique ability to compute rigorous upper and lower bounds on the true Factor of Safety (FoS), combined with automatic mesh adaptivity, makes OPTUM G2 a superior tool for design of retaining walls.