156B Week 6

Status:

Following the proof of concept presentation, the team had an additional meeting with the project sponsor to get feedback on the final design. With the exception of the base design, he approved the concept design. The local team members met this week to purchase parts to fabricate a spar section and determine appropriate tolerancing for machined base. Tom was consulted on possible precision cutting on the PVC spar sections and confirmed base could be fabricated from the desired 316 stainless steel. The team anticipates having all parts in and finalizing the construction of the entire spar mooring by the beginning of week 8. How to best assemble it and what hardware tests can be performed still need to be discussed

Accomplishments from Previous Week

• Calculations were devisited after sponsor commented on inaccuracies (Add mass)

• Finished the base design and ADV on solidworks

• Overall design was approved by the sponsor.

• Continued work on Final Report (Team)

  • First Draft of the report

• Completed Proof of concept Presentation.

• Prototype production was started. PVC was a finalized choice for spar material after deliberation with sponsor regarding the low availability and costliness of 6’’ID ABS pipe

Goals for Next Week (list names after each item).

• Continue working on the prototype (Erik Zamarripa & Ayesha Riaz & Eliran Lenard)

• Work on Final Report (Team)

• Manufacturing the spar base (Team)

• Purchase PVC, hose clamps, oscillating saw (or have machine shop do the precision cutting for the team, and purchase foam (Team)

• Review and prepare purchasing documents (Horim Yu)

Sponsor Comments from Last Meeting (zoom meeting 2/03/21)

• Approved the concept design

  • Each spar section (2m) is composed of ADV and flotation

  • The number of guy wires

  • Spar base design

• Commented the calculation of wave and flow

  • Problem being addressed by reviewing the shallow water

Instructor Comments from Last Meeting and Actions (2/02/2021)

• Discussed the nonlinearity of the spar

  • Recommended modeling the spar as a single cylinder

• Compression/Tension on the spar

• The principal stresses analysis on the spar

• Discussion on stainless steel vs. Galvanized steel (Stainless steel was recommended)

Comments from Other Students in the Class (via email - 2/02/21)

• Presentation feedback :

  • FEA analysis was thorough and detailed

  • Some slides have too much information

• Concerns of validity of shallow water assumption for calculations of cross-shore force

• In terms of anchoring of the guy wires to seabed

Schedule

• Describe upcoming milestone
  manufacture/assemble the final design of the prototype (2/13 - 2/25)
  

• Update Gantt chart.
  Stress/fatigue tests on the prototype (2/20/2021)
  

Budget (list amount spent and amount remaining)

• 
  Team spent ($21) out of our $1000 budget limit

Progress on Report and Webpage

• Completed the first draft for the final report (week 6)
  

• In progress

  • Continue working on the final report (chapter 2,4, and appendix)
    

• Webpage has been updated

  • Final report week 6 Draft in internal tab

  • Week 6 progress report