Istrazivanja i projektovanja za privreduJournal of Applied Engineering Science


DOI: 10.5937/jaes15-12935
This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions. 
Creative Commons License

Volume 15 article 429 pages: 192 - 202

Goran Radoicic
Public Utility Company Mediana, Nis, Serbia

Miomir Jovanovic
University of Nis, Faculty of Mechanical Engineering, Nis, Serbia

This paper presents the importance of a dynamically checked design of the shipbuilding portal rotating crane geometry regarding wind load. The dynamic character of wind load is mathematically introduced by a harmonic function of excitation and logarithmic wind speed profile. Structural analysis on the nonlinear model of the crane is carried out using the finite element method. The dissipation function is described by using an adequate model of structural damping. Combining the tracking and transformation methods, the eigenvalues of the FEM model of the observed structure were extracted. This research provides a faithful mechanical model of the crane for transient analysis in which structural elasticity is verified on the real structure. Through several case studies, the paper indicates a greater danger of a multi-wave wind gust at the steady state of wind speeds statistically recorded in relation to a single-wave wind gust at the extremely recorded speed. Based on the conducted dynamic simulations of wind action a new design criterion is suggested – the conditional quotient of structural geometry.

View article

Ristic, N. (2009), “Hazard wind influence and collapse structure”, Science and Practice, University of Nis, Faculty of Civil Engineering, 178–181.

Hajdin, N., Zlokovic, Dj., Vukobratovic, M. and Djordjevic, V. (-), “Active structures”, Proc. Conf. Mechanics, Material and Constructions, Serbian Academy of Sciences and Arts, 83(2), 419–434.

Bosnjak, S., Zrnic, N. and Dragovic, B. (2009), “Dynamic response of mobile elevating work platform under wind excitation”, Strojniski vestnik – J. Mech. Eng., 55(2), 104–113.

Bajic, A. (2011), “Spatial distribution of expected wind speed maxima in the complex terrain of Croatia as a basis for wind loads calculation”, Ph.D. Dissertation, University of Zagreb, Croatia.

Radoicic, G. and Jovanovic, M. (2013), “Experimental identification of overall structural damping of system”, Strojniski vestnik – J. Mech. Eng., 59(4), 260–268.

Jovanovic, M., Radoicic, G., Petrovic, G. and Markovic, D. (2011), “Dynamical models quality of truss supporting structures”, Facta Universitatis – Series: Mech. Eng., 9(2), 137–148.

Jovanovic, M. (1990), “Supporting structure level luffing system and driving mechanisms resistance of portal-jib cranes optimization”, Ph.D. Dissertation, University of Nis, Nis, Serbia.

Radoicic, G. and Jovanovic, M. (2015), “Dynamic response of heavy-lifting shipyard machines to resonant environmental load conditions”, Facta Universitatis – Series: Working and Living Env. Protection, 12(3), 341–358.

Standard Det Norske Veritas DNV-RP-C104, 2012.

Standard EN 1991-1-4-2005+A1-2010.

Standard ISO 4354:2009, Wind actions on structures, standard/38882.html

Rama, G. (2014), “An automatized in-place analysis of a heavy lift jack-up vessel under survival conditions”, Facta Universitatis – Series: Mech. Eng., 12(2), 107–121.

Standard Det Norske Veritas DNV-RP-205, 2005.

Popovic, O., Bogner, M., Simonovic, A. and Stupar, S. (2011), About Chimneys, ETA, Belgrade, Serbia.

Zaric, M. (2014), “Storm and hurricane gusts of Kosava – blizzard and snowstorm in the northern and northeastern regions of Serbia”, RHMZ of the Republic of Serbia, Belgrade, January-February