Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Study of accelerations restrictions on a roller coaster
Submission Author:
Karoline Raymundo , RJ , Brazil
Co-Authors:
Karoline Raymundo, PAULO ROBERTO ROCHA AGUIAR
Presenter: Karoline Raymundo
doi://10.26678/ABCM.COBEM2021.COB2021-2177
Abstract
Roller coasters were created to amuse people. Since its creation in the XVth century in Russia, they have been evolved until the current format, which it is on most of them created of steel. But some continue to be made of wood. Although, even with all the evolution it has undergone since its inception, there are still cases of accidents and some of them even fatal. Therefore, nowadays with technology and new materials, the precision got to new levels, never achieved before. The design of a roller coaster must be very well calculated in order that, besides its structure and equipment remain intact and with excellent performance, passengers do not suffer health risks, with impacts and with accelerations and decelerations felt, which may occur along the route. The objective of this work was to propose a path profile for a roller coaster, in which passengers can ride comfortably, without suffering from the impacts of accelerations, materials and energies that are present along the path, so that they can enter into worry-free entertainment with health problems. Bibliographies related to the roller coaster theme were identified and studied. This made it possible to assess the needs for carrying out the project and the practices that must be respected, understanding how a roller coaster project is constituted, to reduce the impacts on the lives of passengers. Thus, the geometry and dimensions of a proposal for the tour's route profile were defined, based on what a passenger likes and expects on a roller coaster ride and data provided by the Sea World Entertainment group. However, some path / profile assumptions were defined in this work, given the confidentiality of some data. This profile was developed by excerpts constructed by mathematical functions and then discretized for evaluations of accelerations (and decelerations) and G forces. The constructions of the functions were supported with the use of the Maple program and discretization and evaluations with the Octave program. The equations for the calculations originated from the energy balances for each specific section of the roller coaster. These values were compared to the limits tolerable by the human body. The results obtained in the simulations were compared to international standards and, unfortunately, led to the conclusion that the proposed project cannot be approved. Problems in some sections would need to be corrected by changes in the profile and the reevaluated calculations.
Keywords
Roller Coaster, G force in the bod, Force analysis, Energy balance, Work and energy
