Simulation-based design of passive vibration damping using distributed particle dampers with application to active flexible multibody systems
Final Report Abstract
To save resources, lightweight designs are becoming increasingly important these days. However, a smaller weight typically causes a decrease in stiffness and non-negligible vibration amplitudes over a wide frequency range. One of the very promising tools to reduce these vibrations is the deployment of particle dampers being a derivative of impact dampers. Instead of using only one impact object, multiple particles are used. The particle size normally ranges from the micrometer scale to the millimeter scale. Thus, from several dozens up to millions of particles might be included in a single particle damper. Either a box or a hole in the vibrating structure serves as a particle container. The structural vibrations are transmitted via the particle container onto the particles. Interactions between particles and between particles and the container walls cause an energy dissipation by impacts and frictional phenomena. However, so far particle dampers have been mostly developed by time consuming experimentalbased trial and error strategies for very specific applications, where the adaption to other systems is extremely limited. This might be due to the fact, that the processes in the particle dampers are highly nonlinear and depend on a variety of different influence parameters, like the coefficient of restitution (COR), the coefficient of friction, the excitation frequency, and the vibration amplitude. Due to the lack of understanding of these processes in the dampers and missing systematic design approaches, particle dampers application is so far limited. The goal of this project is the development of a new design methodology in form of a tool chain for passive vibration damping of lightweight structures and machines using particle dampers. Thereby, using simulations that are verified by experiments, also a deeper understanding of the micro-mechanical processes in the dampers are obtained. This is crucial in the systematic design of particle dampers using numerical methods. By this new design methodology, which is in parts independent of the specific application, it is possible to extend particle dampers to a variety of very different applications, which has been shown at multiple examples. Using the developed tool chain single particle damper units with predefined characteristics are developed which do not rely on a specific application. These individual particle dampers finally form an assembly set, which is ultimately used in the overall damping concept for specific applications. Videos of the performed experiments can be found at: https://www.tuhh.de/mum/forschung/forschungsgebiete-und-projekte/partikeldaempfer-zur-passiven-schwingungsdaempfung-in-flexiblen-mehrkoerpersystemen.html
Publications
- An experimental model for the analysis of energy dissipation in particle dampers, Proceedings in Applied Mathematics and Mechanics (PAMM), Vol. 19, 2019
Meyer, N.; Seifried, R.
(See online at https://doi.org/10.1002/pamm.201900171) - Experimental and Numerical Investigations on Parameters Influencing Energy Dissipation in Particle Dampers, Proceedings of the VI International Conference on Particle-Based Methods, 12 pages, Barcelona, Spain, 2019
Meyer, N.; Seifried, R.
- Numerical and experimental investigations in the damping behavior of particle dampers attached to a vibrating structure, Computers & Structures 238, 12 pages, 2020
Meyer, N.; Seifried, R.
(See online at https://doi.org/10.1016/j.compstruc.2020.106281) - Damping prediction of particle dampers for structures under forced vibration using effective fields, Granular Matter 23, 13 pages, 2021
Meyer, N.; Seifried, R.
(See online at https://doi.org/10.1007/s10035-021-01128-z) - Systematic design of particle dampers for horizontal vibrations with application to a lightweight manipulator, Journal of Sound and Vibration 510, 19 pages, 2021
Meyer, N.; Seifried, R.
(See online at https://doi.org/10.1016/j.jsv.2021.116319) - Toward a design methodology for particle dampers by analyzing their energy dissipation, Computational Particle Mechanics 8 (4), 19 pages, 2021
Meyer, N.; Seifried, R.
(See online at https://doi.org/10.1007/s40571-020-00363-0)
