Determine the combined critical speed of shaft in HW 06 problem 1 using Dunkerley’s equation. Assume uniform diameter of 1.3in throughout.

MEE 342 – Principles of Mechanical Design

1. Determine the combined critical speed of shaft in HW 06 problem 1 using Dunkerley’s equation. Assume uniform diameter of 1.3in throughout.
2. Determine the combined critical speed of shaft in HW 06 problem 2 using Dunkerley’s equation. Assume constant diameter throughout. If the operating speed is unsafe, suggest alternate solutions.
3. The shaft in HW6 problem 2 is used for shaft b in 11W4 problem 3. Design bearings at supports such that each bearing will last 5 kilohours at 2000rpm and have a minimum reliability of 0.99.