Please use this identifier to cite or link to this item:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/66660
Full metadata record
???org.dspace.app.webui.jsptag.ItemTag.dcfield??? | Value | Language |
---|---|---|
dc.contributor.advisor | 林法勤(Far-Ching Lin) | |
dc.contributor.author | Zi-Yu Chen | en |
dc.contributor.author | 陳子育 | zh_TW |
dc.date.accessioned | 2021-06-17T00:49:33Z | - |
dc.date.available | 2020-02-10 | |
dc.date.copyright | 2020-02-10 | |
dc.date.issued | 2020 | |
dc.date.submitted | 2020-02-04 | |
dc.identifier.citation | 王松永(1986)柳杉及杉木之材質與利用(II)。林產工業。5(1): 66–76。
王松永、夏榮生(1990)臺灣主要經濟樹種材質之基礎研究(11):長尾尖櫧,光腊樹及臺灣櫸之單面與全面水分移動速度之變異性。林產工業。9(4): 13-29。 王松永(2000)商用木材。中華林產事業協會。 王松永(2001)木材物理學。國立編譯館。 王松永、塗三賢(2007)木材利用、木構建築對溫室氣體減量貢獻。林業研究專訊。14(6): 1–5。 經濟部標準檢驗局(2011)木材抗壓試驗法。CNS 453。 經濟部標準檢驗局(2013)木材抗彎試驗法。CNS 454。 經濟部標準檢驗局(2015)針葉樹結構用製材。CNS 14630。 經濟部標準檢驗局(2016)結構用集成材。CNS 11031。 呂威達(2018) 數位影像相關法分析直交集成材之滾動剪力性質。國立台灣大學森林環境暨資源學系碩士論文。88頁。 李佳如、楊德新(2010)應用非破壞檢測技術評估杉木集成元之抗彎性質。林業研究季刊。32(4): 45-59。 李世豪(2012)有限元素法模擬與分析徑面與弦面板木材之濕翹曲。臺灣林業科學。27(2):125-130。 林振榮、鍾智昕(2010)木質材料非破壞性試驗及評估的現況。臺灣林業專訊。17(5):62-67。 林俊成、陳彥宏(2015)木竹製品製造業之原料採購考慮因素,與國產材認知調查分析。臺灣林業科學。30(2):109-119。 詹為巽、林俊成(2016)國內至材業者使用國材材之現況。林業研究專訊。23(6):114-117。 彭炳勳、邱志明(2017)以非破壞檢測技術評估白千層腐朽劣化研究。林業研究專訊。24(6):9-11。 黃彥三、陳欣欣(1996)以打音非破壞試驗推定木材含水率變化之研究。臺灣林業科學。11(4): 367-372。 黃彥三、陳欣欣(2004)木材應力波非破壞計測技術之研發及應用。中華林學季刊。37(3):317-323。 黃金城、林翰謙、黃秋惠、吳幸芳、葉明筠(2003)台灣雲葉、青剛櫟及相思樹作為防火樹種之可行性探討。林產工業。22(2):129-138。 曾逸仁、徐明福、黃斌(2005)超音波法應用於臺灣傳統大木構件非破壞檢測適用性之研究。建築學報。(52):37-58。 張豐丞、楊德新、謝岱芸、林志憲、卓志隆(2015)應用時間溫度疊加原理評估熱處理材之潛變行為。林產工業。34(3):109-120。 陳欣欣、黃彥三(1991)送材方向對砂光面粗糙度之影響-FFT頻譜分析之應用。林業試驗所研究報告季刊。6(2):173-184。 陳載永、葉政翰(1996)樹種對三種非破壞性測定儀檢測木材彈性係數之影響。林產工業。15(2): 285-294。 陳麗琴、陳溢宏、林俊成(2012)以實體材積當量估算臺灣地區木質材料需求量林業研究專訊。19(5):50-53。 馮豐隆、張鈞媛(2007)大葉桃花心木的自然性質與利用。Nature-_History_of_Mahogany.4(25):4。 葉民權、李文雄、林玉麗(2006)國產柳杉造林木開發結構用集成材之研究。臺灣林業科學。21(4):531-546。 葉民權、吳康正、林玉麗(2008)結構用柳杉集成材之螺栓接合抗彎矩強度研究。臺灣林業科學。23(4):365-375。 童建樺、林宜清、張家瑋(2018)混凝土強度非破壞測驗儀開發。中興工程。139:99-104。 楊德新(2007)中小徑木製造構造用集成材及其工程性能之研究。國立臺灣大學森林學研究所博士論文。155頁。 劉業經、呂福源、歐辰雄(1994)臺灣樹木誌。國立中興大學農學院出版委員會。 鄭雅文、林蘭東、李佳如、楊德新(2016)非破壞性檢測技術應用於南方松木材彈性模數之探討。林業研究季刊。38(4):241-252。 蘇文清、陳周宏、陳柏璋、王怡仁(2007)荷重跨距內節特徵對臺灣杉及杉木抗彎性質的影響。林產工業。26(2): 149-157。 Baar, J. J. Tippner and P. Rademacher (2015) Prediction of mechanical properties- modulus of rupture and modulus of elasticity-of five tropical species by nondestructive methods. Maderas Ciencia y Tecnologia. 17(2): 239-252 . Bal, B. C. and I. Bektas (2012) The effect of heat treatment on the physical properties of juvenile wood and mature wood of eucalyptus grandis. Bioresources 7(4): 5117-5124 . Bucur, V. (2006) Acoustics of wood. Springer series in Wood science 2(4):37-103 pp. Burdzik, W. M. (1983) Reinforcement of wood materials: A Review. Wood and Fiber science 16(3): 391-397 . Chen, T.Y., and J.H. Yeh (1996) Influence of wood species on the modulus of elasticity of wood with three kinds of nondestructive test instruments. Forest Product Industry 15(2): 285-294 . Dole, D. V., and L. J. Marwart (1966) Properties of southern pine in relation to strength grading of dimension lumber. Research paper., U.S. Department of Agriculture. 62 . Huang, Y.S., T.C. Hsiung., SS Chen (1990) The feasibility of FFT spectrum analysis by tap tone as applied to the quality evaluation of woods. Forest Product Industry 9(1): 43-54 . Kataoka, A., and T. Ono (1975) The relations of experimental factors to the measured values of dynamic mechanical properties of wood. Mokuzai Gakkaishi part1, 21:543-550 pp;part 2,22:1-7. Kataoka, A., and T. Ono (1976) The dynamic mechanical properties of sitka spruce used for sounding boards. Mokuzai Gakkaishi 22:436-443 . Krajcinovic, D. (1972) Sandwich beam analysis. Journal of Applied Mechanics 39(3): 773-778 . Pellerin, R., and R.J. Ross (1989) Nondestructive evaluation of wood and wood products. Concise encyclopedia of wood and wood-based materials 203-206 . Rebic, M., and J. Srepcic (1988) Correlation between static and dynamic modulus of elasticity at various moisture conditions. Proc Conf Comportement Mecanique du Bois, Bordeaux 8-9 . Moaveni. S. (2008) Finite element analysis: theory and Application with ANSYS. Pearson Education, Inc. 886 p. Sobue, N. (1986a) Measurement of Young’s modulus by the transient longitudinal vibration of wooden beams using FFT spectrum analyzer. Mokuzai Gakkaishi 32:744-747. Sobue, N. (1986b) Instantaneous measurement of elastic constants by analysis of the tap tone of wood. Application to flexural vibration of beams. Mokuzai Gakkaishi 32:274-279. Sobue, N. (1990) Correction factors of the resonance frequency for taping and shear deformation of a log in flexural vibration. Mokuzai Gakkaishi 36:760-764. Sobue, N., and M. Kitazumi. (1991) Identification of power spectrum peaks of vibrating completely free wood plates and moduli of elasticity measurement. Mokuzai Gakkaishi 37:9-15. Wang, C.Y., and C.M. Wang (2014) Structure vibration: Exact solutions for strings, membranes, beams and plates. Taylor & Francis Group. 4:71-122 pp. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/66660 | - |
dc.description.abstract | 本研究使用6種針、闊葉樹進行多重複打音法試驗,並以有限元素分析模擬各試材之振動頻率與振動模態,研究各試材之打音模態分布及多重複試驗對打音頻率變化之影響。試材以目視分等與抗彎彈性模數試驗做基本性質之評估,計算出各試材之抗彎彈性模數,並與打音法所量測之動彈性模數進行比較,最後比較打音法所量測之打音頻率與有限元素分析之模擬值比較,探討兩者間的相關性與差異。
多重複打音試驗顯示頻率變化主要分為4種類型,分別為穩定型、上升型、驟降型與隨機型,影響頻率變化的原因有試材密度、紋理、敲擊點硬度等,穩定型在每個樹種間皆有出現,上升型與驟降型出要發生於針葉樹;隨機型則是多集中於闊葉樹,隨著打音次數上升至300次時,頻率變化將會逐漸穩定,在頻率的標準差與變異係數的部分,針葉樹之標準差與變異係數皆較闊葉樹低,因此得到之敲擊頻率也較為穩定。 本次試驗主要能敲擊出試材之3種振動模態,分別為縱向振動第一模態、縱向振動第二模態以及橫向振動第一模態,有時還會敲擊出不在預期的異常頻率,當敲擊試材之中央點時,以縱向振動模態為主要出現模態,而敲擊試材角落點時則因樹種不同而有不同的模態分布,針葉樹仍以縱向振動模態作為主要出現模態,而闊葉樹則是以橫向振動模態為主要出現模態;縱向振動第二模態與異常之模態出現率則是闊葉樹高於針葉樹。 有限元素分析可模擬試材之縱向振動模態、橫向振動模態與扭轉振動模態,縱向振動頻率與有限元素模擬之結果相關性高,R2值皆高於0.99,針葉樹實驗值較模擬值頻均低16.6 %,闊葉樹則是低14.0 %;橫向振動頻率之實驗值與有限元素模擬之相關性低,因此僅能以有限元素模擬之結果推算試材縱向振動頻率。 打音法可以量測到許多模態,但並非所有模態皆會出現,本次試驗所使用之儀器仍有改進之空間,應改善試材敲擊時的旋轉,以及敲擊槌敲擊力道過小等問題,才可以取得更多模態之振動頻率。 | zh_TW |
dc.description.abstract | This study uses the multi-repetition tap tone method to test on 6 kinds of softwood and hardwood, and uses finite element analysis to simulate the vibration frequency and vibration mode of each specimens. We studied the tap tone modal distribution of the specimens and the tap tone frequency influenced by the multi-repetition test. We first used visual grading method and static bending test to evaluate each specimen. Next, follow by comparing the modulus of elasticity that were calculated with the dynamic modulus of elasticity measured by tap tone method. In the end, evaluate the frequency measured by tap tone method and the analog value of finite element analysis to discuss the correlation and difference between them.
Multi-repetition tap tone method shows that the frequency changes can be mainly categorize into 4 types, them being stable, increasing, steep decreasing and random type. The potential reasons affecting the frequency change are the density and texture of the specimens, hardness of the impact point and instrument abnormal; stable type occurs in each tree species; increasing type and steep decreasing type always occur in softwood; random type mostly concentrated in hardwood. As the sample size approaching 300, the result will gradually become stable. In terms of the standard deviation and the coefficient of variation for the results, both two values are lower for softwood comparing to hardwood, therefore the softwood has more consistence result while using the tap tone method. Through this study there are three main vibration modes of the specimens while tapping, which are first mode of longitudinal vibration, second mode of longitudinal vibration and first mode of transverse vibration. Also, sometimes it taps out of mode abnormal frequency. When taping the central point of the specimens, the longitudinal vibration is the main mode, when taping the corner point, the tree species have different modal distributions, the softwood still has the longitudinal vibration as the main mode, while the hardwood has the transverse vibration as the main mode. For longitudinal second mode vibration and abnormal mode, the occurrence rate of hardwood is higher than that of softwood. The finite element analysis can simulate the longitudinal vibration mode, transverse vibration mode and torsion vibration mode of the specimens. The longitudinal vibration frequency is highly correlated with the results of the finite element simulation, with all R2 value that are higher than 0.99. As for analog value mean, softwoods’ mean is lower than 16.6 %, while hardwoods’ mean is lower than 14%. For transverse vibration’s result, the correlation with finite element simulation are not significant, therefore we could only use the finite element simulation to calculate specimens’ longitudinal vibration. Tap tone method can definitely measure multiple modes of vibration, however yet to cover all possible modes, indicating there is still room for the equipment used in this study to improve. The rotation of the specimen while taping, and the force for each tap would need to be optimized in order to collect more modes of vibration. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T00:49:33Z (GMT). No. of bitstreams: 1 ntu-109-R06625035-1.pdf: 5465812 bytes, checksum: 5820cecb3aa917176c96cba55b2b461f (MD5) Previous issue date: 2020 | en |
dc.description.tableofcontents | 謝誌 i
中文摘要 ii 英文摘要 iv 目錄 vi 表目錄 ix 圖目錄 xi 第一章、前言 1 第二章、文獻回顧 3 2.1針葉樹試材 3 2.1.1柳杉(Cryptomeria japonica) 3 2.1.2杉木(Cunninghamia lanceolate) 3 2.1.3臺灣杉(Taiwania crypotomerioides) 4 2.2闊葉樹試材 4 2.2.1大葉桃花心木(Swietenia marcophylla) 4 2.2.2相思樹(Acacia confuse) 5 2.2.3 臺灣櫸(Zelkove serrata) 5 2.3非破壞性試驗與評估 6 2.3.1非破壞檢測優點與應用 6 2.3.2打音法試驗 7 2.3.3打音頻率與動彈性模數關係式 8 2.4 木材內的聲學性質 9 2.4.1波在均質固體中傳播 9 2.4.2波在非均質介質中傳播 10 2.4.3 聲學頻率範圍內的機械振動 11 2.4.4桿和板的共振模式 12 2.4.5 木樑中的橫向振動 13 2.5有限元素法與ANSYS軟體 15 2.5.1有限元素分析原理 16 2.5.2 有限元素法與ANSYS應用 16 第三章、材料與方法 18 3.1試驗材料 18 3.2試驗流程 19 3.3試材基本性質測試 20 3.3.1密度試驗 20 3.3.2含水率檢測 21 3.3.3目視分等 22 3.3.4抗彎彈性模數試驗 23 3.4重複打音試驗 24 3.5 有限元素分析 26 第四章、結果討論 27 4.1試材基本性質 27 4.1.1密度(Density) 27 4.1.2 含水率(Moisture content, MC) 28 4.1.3 目視分等 29 4.1.4 抗彎彈性模數(MOE) 30 4.1.5 打音法敲擊頻率與動彈性模數(DMOE) 31 4.2 DMOE與MOE之比較分析 33 4.3 重複打音試驗 35 4.3.1 中央點200次重複打音結果 35 4.3.2 200次重複打音結果 40 4.3.3 500次重複打音結果 42 4.3.4 500次打音頻率分布與標準差上下限 45 4.4 各點敲擊模態探討 47 4.4.1 頻譜與模態分類 48 4.4.2 各樹種不同敲擊位置與模態出現機率 49 4.4.3 3不同敲擊點縱向振動頻率比較 58 4.4.4 頻譜與模態擷取 61 4.5 有限元素法模擬 62 4.5.1 縱向振動頻率實驗值與有限元素模擬值比較 63 4.5.2橫向振動頻率實驗值與有限元素模擬值比較 66 4.5.3 橫向振動頻率手動敲擊中下點之實驗值與有限元素模擬值比較 69 第五章、結論 72 參考文獻 74 | |
dc.language.iso | zh-TW | |
dc.title | 以打音法進行製材多重模式振動模態之研究 | zh_TW |
dc.title | Studying on multiple modes modal test of lumber vibration by tap tone method | en |
dc.type | Thesis | |
dc.date.schoolyear | 108-1 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 葉仲基(Chung-Kee Yeh),張豐丞(Feng-Cheng Chang) | |
dc.subject.keyword | 打音法,振動模態,有限元素法, | zh_TW |
dc.subject.keyword | Tap tone method,vibration mode,finite element method, | en |
dc.relation.page | 78 | |
dc.identifier.doi | 10.6342/NTU202000293 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2020-02-05 | |
dc.contributor.author-college | 生物資源暨農學院 | zh_TW |
dc.contributor.author-dept | 森林環境暨資源學研究所 | zh_TW |
Appears in Collections: | 森林環境暨資源學系 |
Files in This Item:
File | Size | Format | |
---|---|---|---|
ntu-109-1.pdf Restricted Access | 5.34 MB | Adobe PDF |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.