Prof., PhD., DSc Anna Al Sabouni-Zawadzka
Warsaw University of Technology, Faculty of Civil Engineering
TENSEGRITY METAMATERIALS: FROM PHOTOPOLYMER NETWORKS TO TUNABLE VIBRATION ISOLATION
This lecture will explore tensegrity metamaterials as a new paradigm for designing lightweight systems with programmable mechanical and dynamic behavior. Enabled by additive manufacturing of photopolymer-based architectures, tensegrity systems offer unprecedented control over geometry, prestress, and material distribution. The talk will show how these design freedoms can be harnessed to tune stiffness, stability, and vibration response. A central theme will be graded tensegrity metamaterials, where spatial variation becomes a powerful tool for enhancing mechanical performance and achieving adaptable vibration isolation. By bridging advanced fabrication, experiments, and numerical modeling, the lecture will outline emerging opportunities for reconfigurable metamaterials and their role in future adaptive and resilient structural systems.
Professor, Dr. Sc. Vladyslav Danishevskyy
Director of the Educational and Scientific Institute
«Prydniprovska State Academy of Civil Engineering and Architecture»
Ukrainian State University of Science and Technology
DESIGN OF PHONONIC CRYSTALS FOR VIBRATIONS AND NOISE CONTROL USING THE PARTICLE SWARM OPTIMIZATION
Phononic crystals are heterogeneous metamaterials with a periodic internal architecture specifically designed to control the propagation of elastic waves. A key challenge in this field is the rational design of phononic crystal microstructures to achieve desired dynamic characteristics, such as selective filtering of sound and vibrations in a target frequency range. The speaker will present a novel phononic crystal design methodology based on the particle swarm optimization (PSO) algorithm, which considers the propagation of longitudinal elastic waves in one-dimensional phononic crystals composed of periodically alternating layers of two different materials. The dispersion relation was derived and the corresponding damping coefficient was calculated using the Floquet-Bloch formalism to determine the optimal unit cell size and volume fractions of the constituent materials to effectively suppress the transmission of 50 Hz vibrations and 500 Hz noise.
Professor, Dr.Sc. Denys Volchok
Head of the Department of Operation and Repair of Machines of the Educational and Scientific Institute
«Prydniprovska State Academy of Civil Engineering and Architecture»
Ukrainian State University of Science and Technology
APPLICATION OF MODERN CONCEPTS AND METHODS OF UNCERTAINTY THEORIES FOR MODELING, ANALYSIS, AND SOLVING ENGINEERING AND TECHNICAL PROBLEMS
In uncertainty modeling in engineering, the validity of a computational model and its corresponding schemes relative to a real-world object is assessed based on the reliability of the obtained results, the improvement of which remains a significant scientific challenge. Such improvement often lies in the qualitative and quantitative consideration of factors related to heterogeneous uncertainty.
The speaker will present original approaches to modeling and solving this problem, focusing on the development of methods for computing, analyzing, and optimizing complex systems exposed to various types of uncertainty, including fuzzy, approximate, and probabilistic uncertainty. Various problem formulations and their corresponding approaches will be presented, including the expected value model, the chance constraint programming model, the random-dependent programming model, and models with fuzzy-random and random-fuzzy data.