Framtagning av ramp för att eliminera snubbelrisk

Bridges that are used to board cruise ships are called passenger boardingbridges, some of these are designed by FMT. The safety of the passen-gers boarding can sometimes by compromised by a vertical gap betweenthe rotunda and the tunnel. This vertical gap is caused by varying dockslopes, creating trip hazards for passengers. The purpose of this study is tomitigate the trip hazard exposed to the passengers. No vertical edge mayexceed the limits set by the Americans with Disabilities Act, as many ofFMT’s customers are in the USA.A structured product development approach is employed, encompassingrequirements specification and concept generation. This leads to a conceptchoice via a weighted scoring matrix. This includes concepts such as rubberramp, tunnel leveling, segmented ramp and an elastically deforming metalramp design.Conversations with various rubber manufacturers are conducted and thematerial TPU shore A95 is chosen for the ramp. The material data neededfor finite element simulations is gathered using constitutive models derivedfrom 3D-printed TPU samples stress–strain data.Finite element simulations are done, analyzing the stress and deformationof the ramp. Three scenarios are simulated: a rotational tilt of 3 per-cent, a distributed load, and a concentrated load from a stiletto heel onthe ramp. The results show a maximum deformation of 9.94 mm, withlocalized stresses remaining well below the material limits.