Investigation into the damping and stiffness characteristics of an elevator car system

Ignacio Herrera, Huijuan Su, Stefan Kaczmarczyk

Research output: Contribution to journalArticle

Abstract

Modelling the dynamic performance of an elevator car system represents a complex task and forms an important step in the elevator system design procedure. The need to consider the behaviour of passengers travelling in the car complicates the procedure further. This paper presents an original approach to identify the stiffness and damping characteristics of an elevator car system in order to investigate the effect of passenger load on the dynamic response. A simplified model is developed and the experimental rig with a rectangular elevator platform fixed on the top of four silent blocks attached to a shaker is setup. The transmissibility measurements are carried out with a harmonic excitation applied first to a platform with no passenger load and then to the platform with one passenger within the frequency range of 1 – 20 Hz. A single person standing on the platform is employed in order to assess the passenger’s contribution to the dynamic behaviour of the elevator car system. Curve fitting technique implemented in MATLAB is used to determine the damping and stiffness coefficients both for the empty car system and the car-passenger system. Investigation on the tolerances for both parameters is carried out. An approach to simplify the experimental procedure and to reduce the number of individual tests is proposed.
Original languageEnglish
JournalApplied Mechanics and Materials
Volume24-25
DOIs
Publication statusPublished - 1 Sep 2010

Fingerprint

Elevators
Railroad cars
Damping
Stiffness
Fixed platforms
Passenger cars
Curve fitting
MATLAB
Dynamic response
Systems analysis

Keywords

  • Damping coefficient
  • elevator car system
  • stiffness coefficient

Cite this

@article{45768dd70bce4c8d934f157d440666b7,
title = "Investigation into the damping and stiffness characteristics of an elevator car system",
abstract = "Modelling the dynamic performance of an elevator car system represents a complex task and forms an important step in the elevator system design procedure. The need to consider the behaviour of passengers travelling in the car complicates the procedure further. This paper presents an original approach to identify the stiffness and damping characteristics of an elevator car system in order to investigate the effect of passenger load on the dynamic response. A simplified model is developed and the experimental rig with a rectangular elevator platform fixed on the top of four silent blocks attached to a shaker is setup. The transmissibility measurements are carried out with a harmonic excitation applied first to a platform with no passenger load and then to the platform with one passenger within the frequency range of 1 – 20 Hz. A single person standing on the platform is employed in order to assess the passenger’s contribution to the dynamic behaviour of the elevator car system. Curve fitting technique implemented in MATLAB is used to determine the damping and stiffness coefficients both for the empty car system and the car-passenger system. Investigation on the tolerances for both parameters is carried out. An approach to simplify the experimental procedure and to reduce the number of individual tests is proposed.",
keywords = "Damping coefficient, elevator car system, stiffness coefficient",
author = "Ignacio Herrera and Huijuan Su and Stefan Kaczmarczyk",
year = "2010",
month = "9",
day = "1",
doi = "10.4028/www.scientific.net/AMM.24-25.77",
language = "English",
volume = "24-25",
journal = "Applied Mechanics and Materials",
issn = "1660-9336",
publisher = "Trans Tech Publications",

}

Investigation into the damping and stiffness characteristics of an elevator car system. / Herrera, Ignacio; Su, Huijuan; Kaczmarczyk, Stefan.

In: Applied Mechanics and Materials, Vol. 24-25, 01.09.2010.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Investigation into the damping and stiffness characteristics of an elevator car system

AU - Herrera, Ignacio

AU - Su, Huijuan

AU - Kaczmarczyk, Stefan

PY - 2010/9/1

Y1 - 2010/9/1

N2 - Modelling the dynamic performance of an elevator car system represents a complex task and forms an important step in the elevator system design procedure. The need to consider the behaviour of passengers travelling in the car complicates the procedure further. This paper presents an original approach to identify the stiffness and damping characteristics of an elevator car system in order to investigate the effect of passenger load on the dynamic response. A simplified model is developed and the experimental rig with a rectangular elevator platform fixed on the top of four silent blocks attached to a shaker is setup. The transmissibility measurements are carried out with a harmonic excitation applied first to a platform with no passenger load and then to the platform with one passenger within the frequency range of 1 – 20 Hz. A single person standing on the platform is employed in order to assess the passenger’s contribution to the dynamic behaviour of the elevator car system. Curve fitting technique implemented in MATLAB is used to determine the damping and stiffness coefficients both for the empty car system and the car-passenger system. Investigation on the tolerances for both parameters is carried out. An approach to simplify the experimental procedure and to reduce the number of individual tests is proposed.

AB - Modelling the dynamic performance of an elevator car system represents a complex task and forms an important step in the elevator system design procedure. The need to consider the behaviour of passengers travelling in the car complicates the procedure further. This paper presents an original approach to identify the stiffness and damping characteristics of an elevator car system in order to investigate the effect of passenger load on the dynamic response. A simplified model is developed and the experimental rig with a rectangular elevator platform fixed on the top of four silent blocks attached to a shaker is setup. The transmissibility measurements are carried out with a harmonic excitation applied first to a platform with no passenger load and then to the platform with one passenger within the frequency range of 1 – 20 Hz. A single person standing on the platform is employed in order to assess the passenger’s contribution to the dynamic behaviour of the elevator car system. Curve fitting technique implemented in MATLAB is used to determine the damping and stiffness coefficients both for the empty car system and the car-passenger system. Investigation on the tolerances for both parameters is carried out. An approach to simplify the experimental procedure and to reduce the number of individual tests is proposed.

KW - Damping coefficient

KW - elevator car system

KW - stiffness coefficient

U2 - 10.4028/www.scientific.net/AMM.24-25.77

DO - 10.4028/www.scientific.net/AMM.24-25.77

M3 - Article

VL - 24-25

JO - Applied Mechanics and Materials

JF - Applied Mechanics and Materials

SN - 1660-9336

ER -