156B Week 1

Status: From CAD analysis, placement for guy wire attachments were made (having a set connected to the top of the spar is essential), further adding to the final design. Fabrication of full size prototype has been scheduled, and parts/ materials are set to be purchased by the end of week 1. Various hardware testing methods and instruments are being procured, such as pressure/stress gauges to record the forces exerted on guy wires and spar structure and finding location to set up our spar structure.

Accomplishments from Previous Week:

• Bought materials for prototype

• Design completed for the Spar and base

• Derived full flow and wave equations (underwater motion)

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

• Figure out total pound-force of currents and waves below sea - (Eliran Lenard)

• Receive data from Professor Pawlak, so as to render better simulations and finalize design of the spar base ( Horium Yu)

• Reachout to Scripps Institution of Oceanography for use of their large salt water pool (Erik Zamarripa)

• Dimensions of railroad wheel - (Ayesha Riaz)

• Update the gantt chart - (Ayesha Riaz)

• Full mechanical design in Solidworks - (Eliran Lenard)

• Research the Material (welding/ Fabrication) - (Ayesha Riaz)

• Fabricate full sized prototype (Erik Zamarripa)

• Get representative numerical values from our equations of motion(Erik Zamarripa, Horim Yu)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments

• Water temp data and wave/current data from sponsor to create a simulation

• Design feedback. Sponsor liked the updated design. A couple changes need to be made, but nothing too big.

Instructor Comments from Last Meeting and Actions Taken to Address these Comments

• Look into the different PVC/plastic pipes and foam types

• Instructor hinted to find better cost effective companies for PVC pipes and plumbing material.

• Teammates went to Homedepot and found proper materials. Due to COVID, it was hard to find plumbing supply stores that's open.

• Review proper presentation slide professionalism

Comments from Other Students in the Class

• Use equation editor when presenting equations

• Clearly list any assumptions used in analysis

• Highlights results from analysis

• When presenting FEA results, clearly state all assumptions, list all boundary conditions, and all loading conditions.

Risks and Areas of Concern

• Redo and reevaluate the FEA simulations made on the spar. Ask TAs for help in regards to applying forces on plastics (not using von mises).

Resources or Information Required but not Available

• How much pound-force/newtons is seen in waves and currents

Schedule

• • Describe upcoming milestone

    • • Render better FEA simulation and design

      • Assembly of a full sized prototype

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• Team spent - prototype ($15)