Balancing of flexible rotors using the Numerical Assembly Technique

Balancing high-speed machines is one of the most demanding tasks in rotor dynamics and is becoming increasingly important. Traditional balancing methods require several test runs, which are expensive and time-consuming. The focus of modern balancing methods is therefore to largely replace these test runs with simulations. In this dissertation, the novel analytical simulation method, the Numerical Assembly Technique, is used for this purpose. The method was extended to take into account the behavior of rotors in plain bearings and the influence of viscoelastic materials. Several applications for this simulation method have been developed: An eigenvalue search algorithm, a modal balancing method and a balancing method with inflow numbers. These applications were investigated on the rotor test rig at the Institute of Mechanics and successfully applied to multi-disk rotors.

Duration: 01.11.2020 - 06.12.2023

Contact person: DI Dr.Georg Quinz gquinz@tugraz.at

Mechanics, Modeling and Simulation of Aortic Dissection

The human body in general can be seen as an enormous source of uncertainty and complexity. Our understanding of the mechanisms behind aortic dissection and the aorta is therefore limited. Sensitivity analysis techniques reduce the unpredictability of model responses and in particular the disease mentioned above. By reducing the number of random variables in the computational phase, sensitivity analysis simplifies the diagnostic process and facilitates the development of patient-specific models. The project is being carried out as part of the GCCE, whereby several institutes are working on the modelling of aortic dissection. For further information, please refer to the project homepage.

Duration: 01.03.2018 - 01.03.2024

Contact person: Dr.techn. Gian Marco Melito gmelito@tugraz.at

Space@Sea

The aim of the ‘Space@Sea’ project is to develop a durable and sustainable solution for the utilisation of space at sea. To this end, a modular system of floating multifunctional platforms is to be developed. These platforms should be able to be assembled offshore to form a complete system that meets the requirements and is therefore highly flexible. The aim is to create a product that can be used for various applications.

The working group consists of 17 European partners. The project contribution of the Institute of Mechanics at Graz University of Technology aims to develop concepts for connecting the floating platforms. For further information, please refer to the project homepage.

Duration: 01.11.2017 - 01.11.2020

Contact person: Dipl.-Ing. Bernhard Blümel