Optimization of vibration characteristics by structural modification

In nature, there are various regular and irregular lattice and honeycomb structures, which often fulfil different functions. The shells of marine unicellular organisms in particular show a great variety of such geometries. For example, the silicate shells of diatoms are very light and permeable and reveal at the same time high strength. Furthermore, the structures are expected to exhibit special vibration properties due to their structural irregularities in in order to protect the algae from external vibrations caused by predators.

This project investigates how a directed use of structural irregularities influences the vibration properties favorably. Resonance phenomena can be avoided due to eigenfrequency maximization or directed eigenfrequency adjustment.

Investigating the influence of structural components on the natural vibration of structures is of great interest for many applications. Possible fields of application include mechanical engineering, aerospace, construction and optics.

In cooperation with the German Electron Synchrotron (DESY) in Hamburg, the magnet underframes of a new particle accelerator PETRA IV will be optimized in order to achieve a high first natural frequency and stiffness as well as a low mass.