Post date: Jan 14, 2017 7:47:8 PM
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Risk reduction
No vector of motion that will cause rotation
Twisting could be problematic. Need friction/tension testing
Ship shrinking in cold water?
Moving supports
All the designs are sensitive to temperature.
Take that into consideration.
Reasons to not use chains.
It could be dependent on ship building.
Crane picking up things underneath and chains can be in the way.
Delson’s written notes on presentation:
Reference source images
Explain need for overall project - objectics, priorities, etc
Diagrams need to show better the thing they are representing
Shores:
We need to look into “Fixturing” in regards to how the shores contact a ship.
Delson was worried about the ship slipping off the blocks.
A slight modification to the keel blocks may help support the ship.
Chains:
Worries about stress concentration on ship
Chains would have to be held in tension to avoid jerk loading
Buckling Analysis:
Didn’t connect how this analysis was helping our presentation, how it applied to our project.
Presentation skipped over primary object of project: speed improvement
Also analysis skipped over need for side support -> hurricane/earthquake industry standards
Saw very few details of moving blocks
He would have liked to see more of the design concepts
Missing a discussion of load points inside ship
Scaling justification
Describe goals of projects/deliverables
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(Updated 12/1) Meeting with professor
Buckling: go back to MAE 131A, go with the simplest beam possible.
-Go to FEA and see if you can model the beam on the program
Dimensional Analysis:
-Understand what we are looking for in the analysis
-explain that the main concern is the pressure that is applied on the supports
-create both a static and dynamic scale model. (but everything into black and white)
-Identify the load to be applied to the model.
-Scale 1 to 100
-Dynamic(put this off for now): stress concentrations
-Test that if one bolt is missing, then the system will still hold
Materials
-look at Oil rig
-CES software- link to book in class website
-look for books that take into consideration working in saltwater
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(Updated 11/30) Notes from presentation 1
Explain background more and explain project objectives more specifically and with pictures.
Deliver multiple concepts and possibly a model for risk reduction
For risk reduction, create a comparison table for website for different designs, and rate them with pros and cons
For risk reduction use proposal for how we plan to test structure
Use Roark’s book for buckling analysis https://goo.gl/N5uRCJ
Use Ashby’s book for material analysis, and email delson asking for the Scripts corrosion materials book.
FMEACA analysis, provide a percentage of failure
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(Updated 11/19) For your designs, consider manual vs powered set up/operation and how it affects the cost & time efficiency analysis (now a primary objective).
Also consider hauling block-type movement (and possible automation), which will be a primary objective. By that I mean the blocks should have the ability to be moved into place after the ship has touched the keel.
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