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Master Thesis 30hp: Dynamics of rotating complex structures

Göteborg, Sweden
Closing date: 30 November 2022

Your future challenge

When rotating a body connected to supporting structures, dynamic balance is important to avoid undesirable forces. When the rotating body getting bigger and rotational speed increase, the dynamic balance becomes even more important to avoid large forces in the supporting structure. A typical rotating body at Saab is a complex mechanical structure consisting of different materials, components and fluids.

The inertia of the mechanical structures is not always easy to extract from the CAD tools used in design due to a great number of simplified sub-models, which together forms the main structure. Hence the inertia tensor in some cases is partly unknown testing of the dynamics is needed. Both to get an understanding of the magnitude and the impact on fatigue, and to be able to design a balancing substructure, which serves to lower the dynamic imbalance.

The challenge would be in the range of theoretically describe the method of how to optimize the balancing substructure from test result gained from spinning the mechanical structure, to form a method of how to, early in the design process, guard the location of the principal axes in the inertia tensor. In order to have a perfect dynamic and static balanced structure.  

Your profile

We are looking for two students studying mechanical engineering or equivalent, preferably within Applied Mechanics. The work might include simulation in Matlab or FEM software, as well as CAD, so knowledge within this is a merit. Furthermore an investigative and innovative approach to proving theory is key to solving complex problems. Two students working together with the thesis is recommended but not a requirement.

This position requires that you pass a security vetting based on the current regulations around/of security protection. For positions requiring security clearance additional obligations on citizenship may apply.

What you will be a part of

Business Unit Radar Solutions within Surveillance has around 1400 employees globally. Radar Solutions provides airborne, ground-based and naval radar solutions to the world market.

At Engineering, we have design responsibility for all levels of subsystems for our radar portfolio in areas such as microwaves and antennas, digital functions, software development, printed circuit boards, producibility, mechanical design, power electronics, cabling, computer systems etc.

We are responsible for deliveries in time at agreed cost to our projects, as well as meeting our cost targets for development and manufacturing. Engineering has around 700 employees.

The Mechanical & Cabling Design organization within Engineering is design responsible for the mechanical and cabling parts of our product portfolio. The department has around 75 employees in Gothenburg.

The thesis work will be conducted at the section of Mechanics with support from the section of Environmental Analysis. The section of Environmental Analysis is responsible for environmental engineering analysis within structural analysis, thermal analysis and material analysis.

Saab is a company with a strong people-orientation. We offer a friendly work environment where we support and help each other to be at our best. Continuous learning, career & talent development and employee well-being are examples of areas where we always put the strongest effort to offer great opportunities.