Lightweight structures are susceptible to vibration due their reduced mass. However, conventionally used techniques avoid high amplitudes (such as increasing the mass and/or applying damping mechanisms) contradictory original goal of designing a lightweight structure. An increase eigenfrequencies above external, exciting frequencies helps prevent resonance phenomena. Here, we use combined design and optimisation method generate irregular lattice investigate potential reaching much higher...

Diatoms have delicate and complex shells showing different lightweight design principles that already been applied to technical products improving the mechanical properties. In addition, diatom inspired structures are expected significantly affect vibration characteristics, i.e., eigenfrequencies. Directed eigenfrequency shifts of great interest for many applications prevent undesired high amplitudes. Therefore, numerous dome primarily based on combs, ribs, bulging patterns were constructed...

Abstract Lightweight structures are widely used across different industry sectors. However, they get easily excited by external influences, such as vibrations. Undesired high vibration amplitudes can be avoided shifting the structural eigenfrequencies, which achieved adapting design considering optimisation procedures and primarily inspired diatoms. This has been applied to development process of a girder structure installed in synchrotron radiation facility support heavy magnets other...

Finding the optimal structural design to avoid resonance has been a goal for decades. While recent applied methods often result in using additional active systems or higher mass, adaptation enables shift eigenfrequencies without adding weight. The aim of this study is investigate influence beam and plate on its eigenfrequency change, while varying height pre-deformation according mode shapes. Besides maximisation single eigenfrequencies, also simultaneous increase multiple analysed. It...

Diatoms captivate both biologists and engineers with their remarkable mechanical properties lightweight design principles inherent in shells. Recent studies have indicated that diatom frustules possess optimized shapes align vibrational modes, suggesting an adaptation to vibratory loads. The mode shape method is known significantly alter eigenfrequencies of 1D 2D structures prevent undesired vibration amplitudes. Leveraging this insight, the diatom-inspired approach deform according was...

Synchrotron radiation facilities are very important in different areas of fundamental and applied science to investigate structures or processes at small scales. Magnet–girder assemblies play a key role for the performance such accelerator machines. High structural eigenfrequencies magnet–girder required assure sufficient particle beam stability. The objective present parametric study was numerically quantify impact boundary conditions components on eigenfrequencies. As case studies, two 3 m...

The PETRA IV project at DESY (Deutsches Elektronen Synchrotron) aims building a unique synchrotron light source to provide beams of hard X-rays with unprece-dented coherence properties that can be focused dimensions in the nanometer-regime. An optimization girder structure is necessary reduce impact ambient vibrations on particle beam. For this purpose, several numerical approaches have been made simultaneously reach natural frequencies above 50 Hz, high stiffness and low mass. In order...