Experimental and analytical research on resonance phenomena of vibrating head with MRE regulating element

• Autorzy: Miedzińska D. , Gieleta R. , Osiński J.

Identyfikatory

DOI

10.1515/ijame-2015-0014

• Języki publikacji: EN

Abstrakty

EN

A vibratory pile hammer (VPH) is a mechanical device used to drive steel piles as well as tube piles into soil to provide foundation support for buildings or other structures. In order to increase the stability and the efficiency of the VPH work in the over-resonance frequency, a new VPH construction was developed at the Military University of Technology. The new VPH contains a system of counter-rotating eccentric weights, powered by hydraulic motors, and designed in such a way that horizontal vibrations cancel out, while vertical vibrations are transmitted into the pile. This system is suspended in the static parts by the adaptive variable stiffness pillows based on a smart material, magnetorheological elastomer (MRE), whose rheological and mechanical properties can be reversibly and rapidly controlled by an external magnetic field. The work presented in the paper is a part of the modified VPH construction design process. It concerns the experimental research on the vibrations during the piling process and the analytical analyses of the gained signal. The results will be applied in the VPH control system.

Słowa kluczowe

EN

vibratory pile hammer; resonance; vibrations; Fourier analysis

PL

analiza Fouriera; wibracje; rezonans

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2015
• Tom: Vol. 20, no. 1
• Strony: 201--208
• Opis fizyczny: Bibliogr. 5 poz., rys., tab., wykr.

Twórcy

autor

Miedzińska D.

• Military University of Technology Department of Mechanics and Applied Computer Science 2 Gen. S. Kaliskiego St., 00-908 Warsaw, POLAND

autor

Gieleta R.

• Military University of Technology Department of Mechanics and Applied Computer Science 2 Gen. S. Kaliskiego St., 00-908 Warsaw, POLAND

autor

Osiński J.

• Warsaw University of Technology Faculty of Automotive and Construction Machinery Engineering 84 Narbutta St., 02-524 Warsaw, POLAND

Bibliografia

• [1] An Y. and Shaw M.T. (2003): Actuating properties of soft gels with ordered iron particles: basis for a shear actuator. – Smart Materials and Structures, vol.12, pp.157-163.
• [2] Kallio M., Aalto S. and Lindroos T. (2003): Preliminary test on a MRE device. – AMAS Workshop on Smart Materials and Structures SMART ‘03, mat. konf. pp.53-60.
• [3] Boczkowska A. and Awietjan S. (2009): Magnetorheological urethane elastomers activated by magnetic field. – POLIMERY 2009, vol.54, pp.26-30.
• [4] Fast Fourier Transforms, Connexions online book edited by C. Sidney Burrus, with chapters by C. Sidney Burrus, Ivan Selesnick, Markus Pueschel, Matteo Frigo, and Steven G. Johnson, 2008.
• [5] Michalczyk J. and Cieplok G. (1999): Highly effective systems for vibroisplations and vibrations reduction. – Collegium Colombinum, Krakow.