Publications by authors named "Lucjan Witek"
Influence of Temperature on the Damping Properties of Selected Viscoelastic Materials.
Materials (Basel)
November 2024
Article Synopsis
- The study investigates how temperature affects passive vibration isolation using two viscoelastic materials, butyl rubber and bituminous material.
- An experimental setup with an aluminum alloy Oberst beam and specialized cooling chamber allowed for vibration tests at temperatures ranging from -2 °C to 22 °C and frequencies between 40 Hz and 4000 Hz.
- Results indicated resonance frequencies and damping effectiveness vary with temperature, providing insights for designing quieter vehicles and structures.
Experimental Investigation of Damping Properties of Selected Polymer Materials.
Materials (Basel)
June 2024
Article Synopsis
- The paper investigates the damping properties of viscoelastic materials on a beam for passive vibration isolation through an experimental modal analysis.
- Various specimen configurations were tested, including a cantilever beam covered with a bitumen-based layer and an improved design featuring a thin aluminum layer for constrained layer damping.
- Experimental results provided valuable data on resonant vibration frequencies and amplitudes, allowing a quantitative evaluation of the damping effectiveness of the materials used.