Search results

Filters

  • Journals
  • Authors
  • Keywords
  • Date
  • Type

Search results

Number of results: 2
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

Based on the rolling bearing vibration measurement principle in ISO standard, a nonlinear dynamic model of ball bearing is built and motion equations of the inner ring, outer ring, and rolling elements are derived by using Lagrange’s equation. The ball bearing model includes the influence of waviness, rotational speed, external load, arbor supporting stiffness and arbor eccentricity. Ball bearing high-speed vibration tests are performed and used to verify the theoretical results. Simulated results showed that specific waviness orders produced the principal frequencies that were proportional to rotational speed. Rotational speed mainly affected the value of the natural frequency of the bearing system, and RMS (Root Mean Square) of the full band had a great fluctuation with the increase of rotational speed. In the experiment, spectrum and RMS of 2fs-30 kHz (fs: the rotational frequency of inner ring/arbor) under high speed could include not only the influence of rotational speed but also principal frequencies produced by waviness, which could cover the part of requirements of the standard bearing vibration measurement.

Go to article

Authors and Affiliations

P.P Hou
L.Q. Wang
Q.Y. Peng
Download PDF Download RIS Download Bibtex

Abstract

Paintings inevitably bear severe mechanical loads during transportation.Understanding the dynamic characteristics of paintings helps to avoid damage during transportation and to effectively slow down their aging.In this contribution, the vibration characteristics of canvas and primed canvas of paintings and their influencing factors are studied experimentally.For this reason, two dummy paintings with canvas in a common orientation and a tilted orientation are investigated, and an experimental setup using an excitation mechanism and a laser Doppler vibrometer is developed.In order to avoid changes of the modal parameters related to humidity or temperature, all experiments were conducted in a climate box.The modal parameters of dummy paintings are identified by means of experimental modal analysis.Also, the difference in modal properties of the two dummy paintings before and after applying the primer are compared.The identified modal parameters are used to reconstruct their eigenmodes.From the identified modal parameters a numerical model is derived, which is then compared to measurements.The comparison shows a good agreement, hence is a hint for the correctness of assuming a modal structure and the quality of the modal parameter identification.Lastly, with the help of the climate box, the influences of humidity and temperature on the eigenfrequencies of dummy paintings are studied.
Go to article

Bibliography

[1] M.F. Mecklenburg. Art in transit: Studies in the transport of paintings. In Proceedings of International Conference on the Packing and Transportation of Paintings, London, 1991.
[2] E. Tsiranidou, E. Bernikola, V. Tornari, T. Fankhauser, M. Läuchli, C. Palmbach, and N. Bäschlin. Holographic monitoring of transportation effects on canvas paintings. SPIE Newsroom, pages 1–3, 2011. doi: 10.1117/2.1201106.003767 .
[3] N. Hein. Die materielle Veränderung von Kunst durch Transporte–Monitoring und Transportschadensbewertung an Gemälden durch das Streifenprojektionsverfahren. Ph.D. Thesis, Staatliche Akademie der Bildenden Künste Stuttgart, Stuttgart, 2015. (in German).
[4] C. Krekel and N. Hein. Kunsttransport: Gibt es eine Grenze zwischen Schaden und beschleunigter Alterung? In Proceedings of ICOM International Council of Museums, Köln, volume 4, pages 12–17, 2014.
[5] C. Krekel and Heinemann C. Wenn Kunstwerke auf Reisen gehen: Mikroschäden mithilfe hochauflösender 3D-Modelle finden und dokumentieren. Das Magazin der Deutschen Forschungsgemeinschaft, 4:12–17, 2020. (in German).
[6] K. Kracht. Die Untersuchung des Schwingungsverhaltens von Ölgemälden in Abhängigkeit der Alterung. Ph.D. Thesis, Technische Universität, Berlin, 2011. (in German).
[7] A. Gmach. Erschütternde Umstände – Schwingungsbelastung von Kunst- und Bauwerken. M.Sc. Thesis, Technische Universität München, 2010. (in German).
[8] M. Läuchli, N. Bäschlin, A. Hoess, T. Fankhauser, C. Palmbach, and M. Ryser. Packing systems for paintings: Damping capacity in relation to transport-induced shock and vibration. In Proceedings of ICOM-CC 17th Trienniel Conference, Melbourne, pages 1–9, 15–19 Sep. 2014.
[9] K. Kracht and T. Kletschkowski. From art to engineering: a technical review on the problem of vibrating canvas part i: excitation and efforts of vibration reduction. Facta Universitatis, Series: Mechanical Engineering, 15(1):163–182, 2017. doi: /10.22190/FUME161010009K .
[10] C. Palmbach. Messung transportbedingter Schwingungen an textilen Bildträgern. M.Sc. Thesis, 2007. (in German).
[11] C. Heinemann, P. Ziegler, N. Hein, C. Krekel, and P. Eberhard. Objektiviertes Gemäldetransportmonitoring unter Berücksichtigung mechanischer Einflussfaktoren. Zeitschrift für Kunsttechnologie und Konservierung, 33(1):178–198, 2019. (in German).
[12] P.G. Chiriboga Arroyo. Finite Element Modeling of Vibrations in Canvas Paintings. Ph.D. Thesis, Delft University of Technology, Delft, 2013.
[13] S. Michalski. Paintings: Their response to temperature, relative humidity, shock, and vibration. Art in Transit: Studies in the Transport of Paintings, pages 223–248, 1991.
[14] M.F. Mecklenburg. Some aspects of the mechanical behavior of fabric supported paintings. Smithsonian Institution, 1982.
[15] E.W. Hagan, M.N. Charalambides, C.T. Young, T.J. Learner, and S. Hackney. Tensile properties of latex paint films with TiO2 pigment. Mechanics of Time-Dependent Materials, 13(2):149–161, 2009. doi: 10.1007/s11043-009-9076-y .
[16] E. Kreyszig. Advanced Engineering Mathematics. John Wiley & Sons, 10 edition, 2009.
[17] D.J. Ewins. Modal Testing: theory, practice and application. John Wiley & Sons, 2009.
[18] R.J. Allemang and D.L. Brown. A complete review of the complex mode indicator function (CMIF) with applications. In Proceedings of ISMA International Conference on Noise and Vibration Engineering, Katholieke Universiteit Leuven, Belgium, pages 3209–3246, 2006.
[19] N.R. Draper and H. Smith. Applied Regression Analysis. John Wiley & Sons, 3 edition, 1998.
Go to article

Authors and Affiliations

Yulong Gao
ORCID: ORCID
Pascal Ziegler
ORCID: ORCID
Carolin Heinemann
ORCID: ORCID
Eva Hartlieb
ORCID: ORCID
Peter Eberhard
ORCID: ORCID

This page uses 'cookies'. Learn more