Lukasz Malinowski

- Linux/Unix server support
- Installation, configuration and management of Linux/Unix servers (Red Hat, Ubuntu, Debian, Oracle Linux)
- Client support

Systemadministrator im Bereich Linux/UNIX Systeme.
Verantwortlich für das Komponentendesign von Red Hat Enterprise Linux Systemen.
Bereitstellung von VMWARE - vSphere ESX Systemen
Bereitstellung von Red Hat Enterprise Linux Systemen

“Adaptive method coupling for the simulation of problems in geotechnical engineering”

A common problem that arises in geotechnical engineering, especially tunnelling, is a discontinuous behaviour of the material that can occur in some parts. Although this phenomenon can appear in small portions of the total domain near excavation zone, it can be detected and taken into account in computer modelling through the appropriate selection of numerical methods. There are number of methods that can be applied: the Boundary Element Method (BEM), Finite Element (FEM)/Finite Difference (FDM) Method and Discrete (Distinct) Element Method and each one is suitable for specific types
of material behaviour.

In this work a methodology is presented, where the analysis method is adaptively chosen depending on the material behaviour. The first step in the analysis is the detection of zones where brittle behaviour occurs. Using BEM, the process starts with elastic analysis determining stress field in the interior of the domain. Checking a yield condition, the program detects zones, that could exhibit discontinuous behaviour. Then, the whole domain is divided into parts where different numerical methods are used: DEM in the discontinuous zone and BEM in the elastic one.

A novel stress installation procedure into Discrete Element Method is introduced. Once the total domain was split into parts and meshed, the DEM zone is brought into compressed state.

A new coupling DEM with BEM approach with overlapping FEM zone is presented. Since in current work the BEM is static and DEM dynamic method, the two sub-domains is coupled in every DEM time step, utilizing iterative (staggered) scheme.

- Management of Informatics Department
- Arranging meetings with representative of informatics companies
- Administration of Internet servers, routers and network
- Implementation of new programs

- Management of Informatics Department
- Arranging meetings with representative of informatics companies
- Administration of Internet servers, routers and network
- Implementation of new programs

- Network Administrator
- Administration of internet servers, routers and network
- Implementation of new programs