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Appendix D: Evaluation of Transit Bus Operator Seats

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Table of Contents D.~. Introduction / Background.............. D.2. Problem Statement.................. D.3. Equipment..e.............................. D-1 ...D-3 D.4. Procedure e e D.~. Results / Discussion..e.................... D.6. Conclusion References ~------.e--~-~------~------.eeeeee---. Sub-appendix DI: Figures....................... D-4 D-IO D-19 D-22 D-23

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List of Figures Figure D5.1 a: SEAT TO for 1 " Random Chuck Holes (Durability Twirls) Figure D5. lb: SEAT % for Economy Track Figure D5.2a: Lower Mass Transmissibilities for Durability Track Figure D5.2b: Upper Mass Transmissibilities for Durability Track Figure D5.3a: Lower Mass Transmissibilities for Economy Track Figure D5.3b: Upper Mass Transmissibilities for Economy Track Figure D-l . l: Bus Photo Figure D-1.2a: Seat 1 Figure D-1.2b: Seat 1 Suspension Linkage Dimensions Figure D-1.3a: Seat 2 Figure D-1.3b: Seat 2 Suspension Linkage Dimensions Figure D-1.4a: Seat 3 Figure D-1.4b: Seat 3 Suspension Linkage Dimensions D-30 Figure D.1 -5a: Seat 4 D-31 Figure D-1.5b: Seat 4 Suspension Linkage Dimensions D-32 Figure D-1.6: Seat 5 D-33 Figure D-1.7a: Seat 6 D-34 Figure D-1.7b: Seat 6 Suspension Linkage Dimensions D-35 Figure D-1.8a: Seat 7 D-36 Figure D-l.8b: Seat 7 Suspension Linkage Dimensions D-37 Figure D-l.9: Universal Seat Mount D-38 Figure D-l.10: Accelerometer Locations D-39 Figure D- 1.11 : Ride Quality Simulator in Seat D-40 Figure D-1.12: PTI Durability Track D-41 Figure D-1.13: Element ~ - Modified High Crown Intersection D-42 Figure D-1.14: Element 9 - Frame Twist D-43 Figure D-1.15: Elements 10 & 11 - Modified Staggered Bumps and Railroad . D-13 ......... D-13 ......... D-16 ...... D-16 . D-17 ....................... D-17 ........... D-24 ........... D-25 .................. D-26 .................. D-27 ....................... D-28 ........... D-29 Crossing D-44 Figure D-.16: Element 12 - Modified l" Random Chuck Holes D-45 Figure D-1.17: Modified 3/4" Chatter Bumps D-46 Figure D-l .18: Modified 4" Chuck Hole D-47 Figure D-l.l9: PT] Economy Track D-48 Figure D-1.20: Floor RMS, RMQ, VDV for 1" Random Chuck Holes D-49 Figure D- 1.2 1: Under Cushion RMS, RMQ, VDV for 1" Random Chuck Holes D-49 Figure D-1.22: Dummy Frame RMS, RMQ, VDV for l" Random Chuck Holes D-50 Figure D-1.23: Lower Mass RMS, RMQ, VDV for 1" Random Chuck Holes D-50 Figure D-1.24: Upper Mass RMS, RMQ, VDV for 1" Random Chuck Holes D-51 Figure D-1.25: Floor RMS, RMQ, VDV for Economy Track D-52 Figure D-1.26: Under Cushion RMS, RMQ, VDV for Economy Track D-52 Figure D-1.27: Dummy Frame RMS, RMQ, VDV for Economy Track D-53 Figure D-1.28: Lower Mass RMS, RMQ, VDV for Economy Track D-53

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Figure D-1.29: Figure D- ~ .30: PSD's, Seat #l, Durability Figure D-~.31: Transmissibilities~ Seat #] DurabilitY Figure D-.32: Figure D-.33: Transmissibilities, Seat #2, Durability Figure D-.34: PSD's, Seat #3, Durability Figure D-.35: Transmissibilities, Seat #3, Durability Figure D-.36: PSD's, Seat #4, Durability Figure D-.37: Transmissibilities, Seat #4, Durability Figure D-~.38: PSD's, Seat #5, Durability D-63 Figure D-.39: Transmissibilities, Seat #5, Durability D-64 Figure D-.40: PSD's, Seat #6, Durability D-65 Figure D-~.41: Transmissibilities, Seat #6, Durability D-66 Figure D-.42: PSD's, Seat #7, Durability D-67 Figure D-.43: Transmissibilities, Seat #7, Durability ~ be Figure D-.44: Seat i Average PSD Functions, Economy D-69 Figure D-.45: Seat ~ Average Transmissibilities, Economy D-70 Figure D-.46: Seat 2 Average PSD Functions, Economy D-71 Figure D-.47: Seat 2 Average Transmissibilities, Economy D-72 Figure D-~.48: Seat 3 Average PSD Functions, Economy D-73 Figure D-.49: Seat 3 Average Transmissibilities, Economy Figure D-.50: Seat 4 Average PSD Functions, Economy Figure D-!.5I: Seat 4 Average Transmissibilities, Economy Figure D-.52: Seat 5 Average PSD Functions, Economy Figure D-.53: Seat 5 Average Transmissibilities, Economy Figure D-.54: Seat 6 Average PSD Functions, Economy Figure D-.55: Seat 6 Average Transmissibilities, Economy Figure D-.56: Seat 7 Average PSD Functions, Economy D-~! Figure D-.57: Seat 7 Average Transmissibilities, Economy D-82 Upper Mass RMS~ RMQ, VDV for EconomY Track.................. ........ D-54 D-55 . D-56 D-57 D-58 ............. D-59 ........... D-60 ........... D-61 D-62 - 7 - - 7 PSD's. Seat #2. Durabilitv.................. -, -, ~- - - - , .D-74 . D-75 . D-76 D-77 . D-78 . D-79 D-80

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List of Tables Table D4. I: Key for Seat Numbering Table D4.2: Summary of Data Analysis Table DS. I: Seat Comparison........... Table D6. I: The Ideal Seat D-6 D-9 . D-10 D-21

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