Stefan Kaczmarczyk has a master’s degree in Mechanical Engineering and he obtained his doctorate in Engineering Dynamics. He is Professor of Applied Mechanics and Postgraduate Programme Leader for Lift Engineering at the University of Northampton. His expertise is in the area of applied dynamics and vibration with particular applications to vertical transportation and material handling systems.
He has been involved in collaborative research with a number of national and international partners and has an extensive track record in consulting and research in vertical transportation and lift engineering. Professor Kaczmarczyk has published over 90 journal and international conference papers in this field. He is a Chartered Engineer, being a Fellow of the Institution of Mechanical Engineers, and he has been serving on the Applied Mechanics Group Committee of the Institute of Physics.
The lift safety codes demand that the dynamic traction conditions must be investigated in addition to the static conditions. This includes evaluation of the traction ratios under emergency braking conditions. For safety reasons, the systems calculations involve the evaluation of dynamic suspension rope tensions on the car and counterweight sides of the traction sheave and seek to guarantee that during normal operation/ car loading and emergency braking conditions slippage between ropes and traction sheave does not occur.
In this paper rope the determination of tensions under dynamic loads arising due to sway of tall buildings caused by diverse environmental issues such as strong wind and earthquake conditions is discussed. The tensions during the lift travel are computed and the corresponding dynamic traction ratios for the worst cases depending on the position of the car in the well are assessed.
The additional dynamic effects are analysed, and it is demonstrated that to make an accurate estimate of the applied traction conditions these effects should be assessed.
Dynamic rope loads and traction ratios under adverse lift operating conditions.
Professor Stefan Kaczmarczyk.
University of Northampton, UK.