Modeling and Analyzing a Portable Basketball Hoop Mech 410, Spring 2011 Nigel Syrotuck and Emily Huang

Overview

�  For our project we decided to model and analyze the stress of a working portable basketball hoop using Solidworks

� We chose Solidworks to become more familiar with the software, as we had not yet used it in class.

Objectives

� Model a realistic setup, where the hoop could be adjusted up and down and the dimensions matched the official rules.

Objectives Continued

� Analyze the stress that would occur on the whole device as if a 200lb basketball player was hanging of the rim

The Modeling Process Let’s take a look at the model...

Modelling Challenges

� Within the parts, challenged to create accurate sweeps, loft and connections between parts.

�  In assembly, dimensioning the parts to produce a regulation hoop, especially when they parts followed a curve.

� Mating the slider. � Producing flat pins off of rounded

surfaces.

Overcoming the Challenges �  Learned quickly how to handle Solidworks,

what it likes and does not, and when it’s in a bad mood.

� Often was stuck in the wrong mode (sketching, moving, in a part not assembly)

�  Learned to use the measuring tool to help dimension the connector parts.

�  Replaced the flat pin extrusions with extrude-cuts, and put the pin on the other part through the hole.

Analysis Process Analyzing the stress produce by a 200lb player hanging from the rim.

Applying a load

Generating the Mesh...

... Which Failed a Few Times Due to Improperly Defined Fixtures

But It Was Corrected and Meshed Successfully

Result force on the hoop

Defining the Stress Plot

Stress plot of the rim

Displacement plot

The Reaction Force on Bolts

The Reaction Force on Bolts

The Reaction Force on Bolts

Stress With the Hoop Fixed to the Backboard,

Analysis challenges

� Unsuccessful mesh generation at first.

Overcoming the Challenges

•  Redefine fixture Mesh was then generated successfully

What I Learned in the Analysis

How to: � Do a Stress analysis � Generate a Mesh � Define a Fixture � Define a Load � Define a Stress Plot � Define a Displacement Plot

Questions? Thank You

References � The Official Rules: http://i.cdn.turner.com/nba/nba/.element/

pdf/2.0/sect/officiating/Official_NBA_Rule_Rook_09-10.pdf

� Pictures: http://t3.gstatic.com/images?

q=tbn:ANd9GcRk2P72DiHU33NVktxlaNZgWB3tPkIUb-i0QdUtM9_oiNszyEXC

http://farm3.static.flickr.com/2157/2388617082_0283458042.jpg