| URN | etd-0725118-123551 | Statistics | This thesis had been viewed 186 times. Download 3 times. |
| Author | Li-Tung Chiu | ||
| Author's Email Address | No Public. | ||
| Department | Institute Of Mechanical Engineering | ||
| Year | 2018 | Semester | 2 |
| Degree | Master | Type of Document | Master's Thesis |
| Language | zh-TW.Big5 Chinese | Page Count | 66 |
| Title | Finite Element Analysis and Improved Design of Car Antenna | ||
| Keyword | |||
| Abstract | Car antennas, which are standard equipment for most car models, are usually installed on top of the car roof. The car antenna is stressed as the car moves and wind pressure is formed upon the antenna, and eventually causing the antenna to fail. This research utilizes the finite element software ANSYS to determine the higher-stressed location in the antenna, and then improves the structural design. Further, thermal analyses are also performed to study the effects of extreme temperatures on the antenna. In this research, CAD models of the antenna including antenna PCB, upper cover, rubber seating and screws were produced by the CAD software Pro/E, and then the models were imported to the finite element analysis program ANSYS to perform static structural analysis. The results revealed that due to wind loading the screw columns suffered the highest stress concentration. Improved designs were made by adding strengthening ribs around the peripherals of the screw columns. A total of 4 models were studied in this thesis including the original model (without the strengthening ribs) and the models with one, two and three pairs of ribs, respectively. The analysis results showed that with the number of ribs increased the stress around the columns was reduced. Finally, structural thermal analyses on the car antenna models were investigated by setting the environment in extreme high and low temperatures. However, the improved design models yielded higher stress than the original model. |
||
| Advisor Committee | |||
| Files | indicate in-campus access at 5 years and off-campus access at 5 years | ||
| Date of Defense | 2018-07-18 | Date of Submission | 2018-07-25 |