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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 盧中仁 | |
dc.contributor.author | CHIA-CHI CHANG | en |
dc.contributor.author | 張珈齊 | zh_TW |
dc.date.accessioned | 2021-06-16T09:30:15Z | - |
dc.date.available | 2022-03-03 | |
dc.date.copyright | 2017-03-03 | |
dc.date.issued | 2017 | |
dc.date.submitted | 2017-02-20 | |
dc.identifier.citation | 1. Russell, D. A., 2004, 'Hoop frequency as a predictor of performance for softball bats,' The Engineering of Sport, 5, p. 2.1.
2. Greenwald, R. M., Penna, L. H., and Crisco, J. J., 2001, 'Differences in batted ball speed with wood and aluminum baseball bats: a batting cage study,' Journal of applied Biomechanics, 17(3), pp. 241-252. 3. Adair, R. K., 1994, 'The Physics f of Baseball.' 4. Cross, R., 2004, 'Center of percussion of hand-held implements,' American Journal of Physics, 72(5), pp. 622-630. 5. Shi, W., Zhang, Y. B., Zhang, T., Li, J. S., and Shi, B. J., 2011 'Modeling and Simulation of Baseball Sweet Spot,' Proc. Advanced Materials Research, Trans Tech Publ, pp. 1635-1638. 6. Lepperd,T.,2016,'OFFCIAL PLAYING RULES COMMITTEE,' http://mlb.mlb.com/mlb/official_info/official_rules/official_rules.jsp. 7. Hendee, S. P., Greenwald, R. M., and Crisco, J. J., 1998, 'Static and dynamic properties of various baseballs,' Journal of Applied Biomechanics, 14, pp. 390-400. 8. Heald, J., 1999 , 'Reducing ball impact the easy way,' Proc. Proceedings of the 1999 Conference on Injuries in Baseball, American Sports Medicine Institute, Birmingham, AL. 9. ASTM Standard F1888, 1888, Test method for compression-displacement of baseballs and softballs,' West Conshohocken, PA, 2009,www.astm.org. 10. Crisco, J., 1997, 'NCAA Research Program on Bat and Ball Performance, final report,' November. 11. Munroe, B. J., and Sherwood, J. A., 2012, 'Finite element modeling of a baseball,' Procedia Engineering, 34, pp. 610-615. 12. Bathke, T., 1998, 'Baseball impact simulation,' Senior thesis, Brown University, Providence, RI. 13. Mustone, T. J., and Sherwood, J. A., 2012, 'Using LS-DYNA to characterize the performance of baseball bats,' Proc. 5th International LS-DYNA Users Conference, September, pp. 21-22. 14. Nicholls, R. L., 2003, Mathematical modelling of bat-ball impact in baseball, University of Western Australia. 15. Vedula, G., 2001, 'Experimental and finite element study of the design parameters of an aluminum baseball bat,' Master thesis, University of Massachusetts Lowell. 16. Smith, L., Shenoy, M., and Axtell, J., 2000, 'Simulated composite baseball bat impacts using numerical and experimental techniques,' Proc. Society for Experimental Mechanics, Spring Conference, Citeseer. 17. Duris, J. G., 2004, 'Experimental and numerical characterization of softballs,' Citeseer. 18. Miller, K., 2000, 'Constitutive modelling of abdominal organs,' Journal of biomechanics, 33(3), pp. 367-373. 19. Brody, H., 1990, 'Models of baseball bats,' American Journal of Physics, 58(8), pp. 756-758. 20. Smith, L., 2001, 'Evaluating baseball bat performance,' Sports Engineering, 4(4), pp. 205-214. 21. Weyrich, A. S., Messier, S. P., Ruhmann, B. S., and Berry, M. J., 1989, 'Effects of bat composition, grip firmness, and impact location on postimpact ball velocity,' Medicine and science in sports and exercise, 21(2), pp. 199-205. 22. Cross, R., 2009, 'Mechanics of swinging a bat,' American Journal of Physics, 77(1), pp. 36-43. 23. Dryden, H. L., Murnaghan, F. D., and Bateman, H., 1956, Hydrodynamics, Dover publications New York. 24. Nathan, A. M., 2008, 'The effect of spin on the flight of a baseball,' American Journal of Physics, 76(2), pp. 119-124. 25. Watts, R. G., and Ferrer, R., 1987, 'The lateral force on a spinning sphere: Aerodynamics of a curveball,' Am. J. Phys, 55(1), pp. 40-44. 26. Sawicki, G. S., Hubbard, M., and Stronge, W. J., 2003, 'How to hit home runs: Optimum baseball bat swing parameters for maximum range trajectories,' American Journal of Physics, 71(11), pp. 1152-1162. 27. Adair, R., 2004, 'Comments on “How to hit home runs: optimum baseball bat swing parameters for maximum range trajectories,” by GS Sawicki, M. Hubbard and WJ Stronge,' Am. J. Phys, 73(2), pp. 184-185. 28. Briggs, L. J., 1959, 'Effect of spin and speed on the lateral deflection (curve) of a baseball; and the Magnus effect for smooth spheres,' Am. J. Phys, 27(8), pp. 589-596. 29. Alaways, L. W., 1998, 'Aerodynamics of the curve-ball: an investigation of the effects of angular velocity on baseball trajectories, Master thesis, University Of California. 30. Alaways, L. W., and Hubbard, M., 2001, 'Experimental determination of baseball spin and lift,' Journal of Sports Sciences, 19(5), pp. 349-358. 31. Cross, R., 2011, Physics of baseball & softball, Springer Science & Business Media. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/59619 | - |
dc.description.abstract | 球棒甜蜜點的分析有助於了解如何有效的增加揮棒效能。甜蜜點有幾種不同的定義。本論文採用在相同揮擊條件下,使得球有最大離棒速度(Ball Exit Velocity,BEV)的擊球位置定義為球棒的甜蜜點。除了甜蜜點之外,我們也討論快速直球和曲球,何者較易被擊出全壘打,換言之,球被擊中後何者有較遠的飛行距離。
球的飛行距離除了牽涉到空氣動力學外,還受到球離棒時的狀態的影響。現今文獻中,較少有關於球離棒時運動狀態的研究。本論文利用有限元素法分析不同條件下球和球棒撞擊的過程。我們建立了滿足大聯盟規範的球與球棒的有限元素模型,並選擇球棒適當的邊界條件以模擬打擊者揮棒的過程。利用這個有限元素模型,我們比較不同定義下的甜蜜點的差異,探討影響BEV的重要因素,分析不同球路下球離棒後的飛行距離。 | zh_TW |
dc.description.abstract | The analysis of the sweet point on a baseball bat is helpful to improve swinging efficiency. There are several different definitions of the sweet point. This thesis defines the sweet point as the place where the baseball acquires the maximum ball exit velocity under the same conditions. Besides the sweet spot, we also study the flying distance of the curve ball and fast ball, comparing which can easier hit homerun. Flying distance of baseball depends on not only the aerodynamic forces acting on the ball also the states of the ball leaving the bat. To the best of my knowledge, there are few studies focusing on the states of the ball when it leaves the bat. In this thesis, the finite element analysis is used to analyze the process of hitting a ball under different conditions. We built the finite element models of the ball and bats complying with the MLB regulation and set the proper boundary conditions for the bat when hitting the ball. With these models, we compared the sweet spots obtained using different definitions, investigated important factors affecting the ball exit velocity, and analyzed the flying distance of various kinds of pitches. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T09:30:15Z (GMT). No. of bitstreams: 1 ntu-106-R03522522-1.pdf: 2335943 bytes, checksum: c5ce4dc6939949eba8da96cc880b2dae (MD5) Previous issue date: 2017 | en |
dc.description.tableofcontents | 口試委員審定書 i
致謝 ii 摘要 iv Abstract v 目錄 vi 圖目錄 viii 表目錄 xi 第一章 緒論Equation Chapter 1 Section 1 1 1.1 研究動機 1 1.2 參考文獻 2 1.3 論文架構 5 第二章 球模型Equation Chapter 2 Section 1 6 2.1 簡介 6 2.1.1 恢復係數 7 2.1.2 抗壓性 7 2.2 材料特性設定 8 2.3 恢復係數的測定: 10 2.3.1 恢復係數的調整 12 2.4 抗壓性的量取方式 17 2.4.1 抗壓性之調整 21 2.5 結果與討論 26 第三章 有限元素分析球和球棒的撞擊Equation Chapter 3 Section 1 28 3.1 打擊效率 28 3.2 邊界條件 28 3.3 初始條件 29 3.4 球棒模型 29 3.5 網格與元素 32 3.6 空氣動力學 34 3.7 棒球飛行的運動方程式 37 3.8 角速度的計算 39 3.9 不同種類的入射球 42 3.10 蝴蝶球 47 3.11 曲球與快速直球 55 3.12 不同揮棒速度下的曲球與快速直球 62 第四章 結論 64 附錄 66 參考文獻 68 | |
dc.language.iso | zh-TW | |
dc.title | 棒球球棒甜蜜點的有限元素分析 | zh_TW |
dc.title | A FEM Analysis of the Sweet Spot on a Baseball Bat | en |
dc.type | Thesis | |
dc.date.schoolyear | 105-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 伍次寅,蘇春 | |
dc.subject.keyword | 棒球甜蜜點,BEV,球棒有限元素分析, | zh_TW |
dc.subject.keyword | sweet point,ball exit velocity,finite element analysis, | en |
dc.relation.page | 69 | |
dc.identifier.doi | 10.6342/NTU201700659 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2017-02-21 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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