156B Week 1

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

    • Performing analysis of flow around our housing. we are considering at least 4 different tips.

    • We are looking for the disturbance of the flow of sand by modeling the flow and assuming it to be similar to water.

    • We will be able to see what geometry will be best to ensure minimal disturbance of the sand/sediment in the line of sight of our camera.

Accomplishments from Previous Week

    • Completed risk reduction presentation with a score of 96/100, well done!

    • Conclusions from risk reduction and experimentation.

Goals for Next Week (list names after each item). Use specific and measurable objectives.

    • To complete individual component analysis.

    • Draw conclusions from analysis and identify parts that need ordering.

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

Team,

Actions items:

1) Square cross-section tube modeling for a) buckling and b) penetration depth (with various cone/wedge configurations) --> please add to existing document and send to me when finished

2) Modeling of shape of wedge/cone and how it affects the fluid (sediment) disturbance around the tube/viewing window --> put in separate document and send to me with discussion of way forward/recommendations

3) Windows - what other options are out there in terms of size and sealing

4) Camera: a) size image required b) resolution, c) optics (ray diagrams based on lenses) to learn how we determine window and mirror dimensions based on lens. I will focus on a) and b) for now.

5) Gantt PMP chart - send to me by end of day today 3/19.

We will not meet next week since you're on SB but we did decide that work could continue on the project during this break to some degree. Items 1,2,5 can be completed more quickly, items 3,4 should be explored before our next meeting as well. Good luck with the presentation!

Let me know if you have comments/questions.

Jon

Vicki to complete #1

Curtis to complete #2

Vicki and Juan have completed #5

Jonathan and Juan to start on #3-4

Instructor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

    • Load is cycling often the position of the o-ring should be on the inside surface and not the top surface.

    • Analysis for buckling needs to be done mathematically, not in solidworks.

    • Find critical force for buckling and use a large factor of safety

    • Fluid Analysis can be extremely complicated.

Jonathan and Curtis have completed a matlab code that calculates the critical force for buckling, they varied parameters of length and thickness to find the minimum force that will result in bucking of the housing. We found that the minimum force required is about 100 times greater than the maximum force produced by the Vibrahead we are designing for.

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

    • Comments from Christopher Hakobian included advice on using o-rings to seal the ends of our housing- 3/12/15 to 3/18/15

  • Comments from Christopher Hakobian included suggestions on what materials to use and cost, anodized aluminum, rolled steel, stainless steel, nickel plating etc... 3/30/15

Risks and Areas of Concern

    • Methods of attaching the window.

    • Not able to test the prototype in real application.

Resources or Information Required but not Available

    • Resolution and image size needed for the camera, Jonathan Oiler to provide more information.

  • CFD analysis software, may not be required.

Schedule

    • ID components needed to acquire/order.

    • Update Gantt chart.

Budget (list amount spent and amount remaining)

    • No change to budget over the break.

Progress on Report and Webpage

    • Report has not been started at this time.

    • Webpage is started but needs more work, about 10% done at this time