The presented paper reveals an innovative device which is the Tuned Particle Impact Damper (TPID). The damper enables the user change the dynamical features of the vibrating system thanks to rapidly tuning the volume of the container where the grains are locked. The effectiveness of proposed semi-active damping methodology was confirmed in experiments on vibrations of a cantilever beam excited by kinematic rule. Various damping characteristics captured for different volumes of the grains container and mass of granular material are presented. It is confirmed that the proposed TPID device allowed for efficient attenuation of the beam’s vibration amplitude in the range of its resonant frequency vibrations.

The paper concerns problems related to controlling the dynamic properties of beam-like elements. The parameters of the investigated system can be changed by external factors, resulting in partial changes in the system mass redistribution. It is assumed that it is possible to control the system dynamics by shaping the object frequency structure. The paper introduces the mathematical model of the investigated cantilever beam filled with a Sponge Particle Structure. The continuous model has been simplified to a discrete multi-degree of freedom system. The influence of the system parameters on its behavior is discussed in details. The possible applications of the presented concept are proposed. The spectral vibration analyses were carried out. Theoretical considerations enabled the use of the preliminary semi-active method for controlling the vibration frequencies through a mass redistribution. Experimental studies were carried out to verify the proposed mathematical model.

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The most popular devices for attenuation of mechanical vibrations are dampers or shock absorbers. Two main energy dissipation strategies can be generally distinguished: passive and active (semi-active). Passive vibration isolation methods are the most commonly used, mainly because of their simplicity and low maintenance costs. Among passive vibration attenuation techniques, also Particle Impact Dampers (PID) are involved. Classical PID solutions have some certain limitations. This paper aims at presenting the new concept of an adaptive tuned PID damper that can pretend to be placed among semi-active energy dissipation methods.

W sprawie partytury teatralnej podejmuje zagadnienia metodologicznych i technicznych problemów związanych z rekonstruowaniem dzieła teatralnego na podstawie zachowanej dokumentacji i innych materiałów archiwalnych, a także z opracowywaniem tzw. partytury udokumentowanej i krytycznej. W tym celu konfrontuje założenia schillerowskiej teatrologii (Zbigniew Raszewski, Jerzy Timoszewicz) i bedierowskiej tekstologii (Konrad Górski, Zbigniew Goliński) z rozwiązaniami postulowanymi przez performatykę (Tomasz Kubikowski, Diana Poskuta-Włodek) i współczesne edytorstwo naukowe (Maria Prussak, Krzysztof Mrowcewicz). Tekst stanowi fragment teoretycznego suplementu pracy doktorskiej Mateusza Żurawskiego Edycja krytyczna scenariuszy autorskich Jerzego Grzegorzewskiego, przygotowanej pod kierunkiem dr. hab. Tomasza Kubikowskiego i dr. hab. Krzysztofa Mrowcewicza w Instytytucie Badań Literackich PAN (2017).