Damping building vibrations excited by surface wave propagating in the ground

• Autorzy: Zachwieja J. , Gołębiowska I.
• Języki publikacji: EN

Abstrakty

EN

This paper presents anticipated results of reducing vibrations of a laboratory building by separating its foundation from the ground. In order to carry out a numerical analysis, the building and the foundation soil were modelled with the use of Multibody System Dynamics (MSD). In a real system, vibrations of walls and floors are caused by propagation of waves in the ground. Such waves are excited by cyclic impact of operating crushing elements of a roller-bowl mill located in the vicinity of the building. Energy carried by the waves is so high that they cause vibrations of the building when the waves encounter an obstacle in the form of the foundation. The vibrations have the velocity of several millimetres per second. This phenomenon has an adverse effect as far as the strength of elements made of brittle materials such as concrete and bricks is concerned, and it becomes critical when high-sensitivity measuring instruments are located in the rooms. Then, vibrations may cause incorrect readings of such instruments and damage of the elements, mainly electronic ones. In order to determine the extent of vibrations propagated from the mill to the laboratory building foundation, measurements of vibration parameters were carried out and amplitudefrequency responses of the investigated objects were obtained. The results of a simulation revealed that an expansion gap having a calculated effective height would allow reducing the level of vibrations in the building as well as in laboratory stations located inside.

Słowa kluczowe

EN

proper vibrations; minimisation of vibrations; resonance frequency values; propagation of disturbances in the ground

• Wydawca: Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology
• Czasopismo: Journal of Polish CIMAC
• Rocznik: 2012
• Tom: Vol. 7, no 3
• Strony: 373--381
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Zachwieja J.

autor

Gołębiowska I.

• University of Technology and Life Sciences Department of Applied Mechanics, Faculty of Mechanical Engineering Department of Building Construction, Faculty of Civil and Environmental Engineering ul. S. Kaliskiego 5, 85-796 Bydgoszcz

Bibliografia

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• [3] Kawecki J., Diagnostyka dynamiczna konstrukcji zagłębionych w gruncie, XX Ogólnopolska Konferencja Warsztatów Pracy Projektanta Konstrukcji, Wisła - Ustroń, 2005.
• [4] Zachwieja J., Numerical modelling of vibrations of machine foundations with percussive characteristics of work, Developments in Machinery Design and Control, 5, pp. 83-96, 2007.
• [5] Zachwieja J., The role of vibroisolators in damping an radial fan’s vibrations, Diagnostyka, 44, pp. 113-118, 2007.
• [6] Zachwieja J., Gołębiowska I., Efektywność wybranych metod ochrony przeciwdrganiowej konstrukcji wsporczej separatorów, Budownictwo Ogólne, Wydawnictwa Uczelniane UTP, pp. 119-126, 2009.
• [7] Zachwieja J., Peszyński K., Vibroisolators application for damping vibrations in industrial fans, Engineering Mechanics, National Conference with International Participation, SVRATKA, Czech Republic, pp. 1390-1401, 2008.