Updated Cart Design

Transport Between House and PondSeed Project 2010Christopher Abbott-KochLance NicholsDaniel Sturnick

Updated Cart Design

3 x 4 x 3 designRollers set at pitch angle of 35oStabilizing Cable Rollers set 2below cart Transparent Walls and Floor.Gate deploys into a loading/unloading ramp.

m = mass of cable per unit length (kg/m) = damping as ratio of critical damping = air density (kilograms per meters cubed (kg/m3))D = cable diameter (m)Scruton numberThe oscillation amplitude of vortex shedding vibrations varies roughly in inverse proportion to the Scruton number.New ChallengesOur original design consisted of a rolling cart guided by two rigid steel cables.

Structural Analysis Eric HernandezStability of design will be a flawMore cables for added stabilityNatural frequency of the system

Model Oscillation TestingFour Connection PointsVulnerable to low to moderate oscillationsNatural Frequency

Model Oscillation TestingSix Connection PointsTension is put in the support cablesDegree of Oscillation drastically reduced

Support Cables3-5 Degrees3-5 Degrees