P19454: GCVM Noise Reduction
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Detailed Design

Table of Contents

Team Vision for Detailed Design Phase

What did your team plan to do during this phase?

What did your team actually accomplish during this phase?

Progress Report

Summary of the Teams Work To Date

Engineering & Data Analysis

Initial Reactions:

Location 1

Location 2

Location 3

Prior to beginning testing at location 3, our high speed photography expert, Dr. Kinsman, had to leave. We attempted to use the high speed function on our phones but the results were lackluster.

Excel files for each test can be found here

Video files can be found here

Proposed Drawings, Schematics, & Prototypes

The images below show our intended design for the fixture that will be used to hold the window sashes during testing.

The window will be held in place with the bolts in the corners.

A vacuum hose can be attached to negative pressure, replicating the affects of the pressure from the cannon blast.

Test Fixture Bill of Material (BOM)

To build our testing rigs, we will need the following materials:

Current Total: $45.46 (subject to increase)

Current Test Plans

Purpose

Meet Engineering Requirements 1,2, and 5.

Proposed Procedure - Low Frequency Fatigue Testing

  1. Determine peak low range frequencies of cannon fire
  2. Build test rig as shown
  3. Use speakers to determine resonant frequency of Sash/glass
  4. Compare results and look for similarities
  5. Replicate frequencies to load windows ( in accordance to displacement data collected during testing)
  6. Repeat cyclical loading until window shows increased damage or failure.

Expected Results

Design and Flowcharts

Process Design Flowchart

This chart shows the ideal organization of the process documentation we are working on. Red boxes indicate inputs from GCVM staff, yellow boxes are the documents themselves, and blue boxes show the outputs of the process itself. Note that yellow process documents work together to turn input data into desirable outputs.

Risk Assessment

Live document can be found here.

Design Review Materials

Plans for Next Phase

There are three main parts that will make up the next phase for our team:

Test Plan, Preparation, & Budget

Window sashes will be tested for fatigue and cracking, as well as testing the plaster. The focus on small scale testing is to ensure we identify the causes of damage to the windows and plaster prior to the Civil War Reenactment.

In order to accomplish this, our team will need to:

Additional Data Collection

Team has looked into other reenactments and artillery demonstrations for cannon recording. This is due to Reynolds Battery having their cannons put away for winter storage so we are exploring alternate options before April. Below is a map of potential reenactments and demonstrations our team could try to attend.

Solution Implementation

The end goal for our team is to create a list of potential solutions for GCVM to implement. This includes but is not limited to: damage reports & documents, sound damping options, and vibration mitigation. With these in hand, GCVM can be advised on best practices to help reduce damage to the historic buildings.

For MSD II, a Project Timeline for Spring 2019 is in the works for planning our next steps. More will be added as the weeks go on and generally will be kept flexible due to the nature of this project being research and result based.


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