Stress Analysis of Elevator Car Frame Bottom Support Using Finite Element Method
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Date
2017-10
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
AAU
Abstract
Elevator is a mechatronic system used to move passengers and goods safely, swift and
comfortable in high-rise buildings. The central and most visible component of an elevator is the
supporting elevator car frame. The supporting elevator car frame is the structural part of the car
and holds the platform and the cab that carries the passengers. The supporting elevator car frame
structure consists of the upper crosshead beam, two vertical uprights (stiles) joining upper and
lower members, and lower safety plank and provides the supporting structure for the car.
The main objective of this study is stress analysis of elevator car frame bottom support using FEM.
The study covers the mathematical modeling, find out the effect of stresses in different parameters
of shape, and stress analysis by considering dynamic loading condition, the performance strength
weight ratio supporting elevator car frame structure using FEM and comparison of stress value
with stiffeners and without stiffeners of beam.
The 3D modeling of the assembly has been carried out on SOLIDWORK 16 and after the assembly
is accomplished on solid work, it has been exported to ANSYS R16. During the analysis of lower
beam structure behavior in ANSYS software, the parameters used are vertical load, nominal
velocity and gravitational acceleration. From ANSYS software simulation result, when the
elevator is in normal running and mechanical break is used, the total deformation, equivalent vonmises
stress
and
equivalent
elastic
strain
and
the
stress
value
of
the
bottom
support
C
channel
beam
due
to
force
applied
have
been
compared.
After
stress analysis from ANSYS result, shifting the
stress concentration point and optimize the strength weight ratio of elevating car frame structure.
It has been observed that the web opening longitudinal stiffeners enable a better stress
redistribution around the opening region contributing for an increase of the beams ultimate load
carrying capacity. The bottom channel web opening supporter beam is 2 % weight reduction in
total mass channel beam and from analytical result, it has been observed that we can improve
13.2% strength weight ratio than the current solid channel beam for the same materiel.
Description
Keywords
stress analysis, web opening C channel beam, strength weight ratio, ANSYS16