Dissertations / Theses on the topic '數值分析'
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陳得林. "連續薄板之數值分析---ByModifiedSplineCollocationMethod." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/33072427851673753493.
Full textDING, DA-WEI, and 丁大為. "爐渣風淬之數值模擬分析." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/86rua5.
Full textXU, WEN-ZHENG, and 許文震. "火焰傳播速度的數值分析." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/88349241201203198489.
Full textXu, Wen-Zhen, and 許文震. "火焰傳播速度的數值分析." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/31331370439719259640.
Full textHAN, JIN-ZHU, and 韓金柱. "兩相流體流動之數值分析." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/59720764230827706026.
Full textWang, Chen Zhong, and 王宸中. "油冷器熱傳特性之數值分析." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/33443924833141780912.
Full textCAI, YAO-LONG, and 蔡曜隆. "單椿承載力分析之數值方法." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/38195547353556667275.
Full textXIE, MING-SHAN, and 謝明杉. "結構穩定之非線性數值分析." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/63716086378798249436.
Full text涂鏡松. "後挫屈之數值分析方法研究." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/16211687472508676121.
Full text國立海洋大學
河海工程學系
91
Abstract In order to acquire the structure of load ability from bucking accurately , an analytical act of post-bucking must be taken . Due to the regular iterative method cannot be applied on the test , for the stiffness matrix on bifurcation point is a singular matrix . Therefore , the perturbation method could build the secondary path of the bifurcation point efficiently. The advance technology of computer development could help me to apply a concept of finite element method to discrete from the structure . Then , this analytical method could calculate for the complicated act of post-buckling by a series of programmable and analytical flowchart .
Chien, An-Chien, and 簡安健. "混凝土修補成效之數值分析." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/53061563819027247932.
Full text國立中央大學
土木工程研究所
87
In the process of adhesive bonded repair of structural components, attempts are usually made to bond the new and old concretes together. Often cement, mortar, or copolymer polyvinyl acetate is used as a paste or joint bonding agent in the adhesive. The service stress states in bonds can vary tremendously so a method of test for bond should replicate or reflect a typically in-service stress state and also be sensitive to variation in the strength of the bond. The slant shear test is frequently used to assess the bonding of joints in concrete construction for such purpose, yet the information provided when the specimens fail along the joint line is still in need. This paper presents a series of numerical analysis for demonstration of the deformation fields in elastoplastic media in the slant shear test. With a finite element plane stress model, the importance of currently anticipating stress distribution and the failure pattern is shown in two sets of tests. The effects of various parameters including the relative stiffness between the adhesive and concrete, the joint angle, and the thickness of adhesive are evaluated. Four bond adhesives with different material properties are considered in the analysis.
余礎宇. "Czochralski長晶爐流場之數值模擬分析." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/39807194551143708643.
Full text許良全. "嘉年華大樓火災火場數值分析." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/82029290057125987191.
Full text元智大學
機械工程研究所
89
ABSTRACT Taiwan is a highly-population country. Most people live in apartments of big buildings. Fires occur from time to time. Hence, the behavior of fires in a building is an important subject to study. Thin thesis is to utilize a zone model (CFAST) and a field model (PHEONICS) for the simulation of Jia-Nian-Hua building fire, occurred in 1995. The results obtained appear to be reasonable and can be used for the reference information related to the design and strategy of fire protection engineering.
CHEN, YAO-FU, and 陳堯福. "多孔性噴流延伸板之數值分析." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/23064646535852604523.
Full textCHEN, MING-YI, and 陳明義. "粒狀火藥高壓燃燒之數值分析." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/96348064962849111877.
Full textCheng, Mao-Chang, and 鄭茂昌. "三度空間之磁場數值模擬分析." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/59924847789372569698.
Full text施冠丞. "突出阻塊管道流場之數值分析." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/82403098935726681682.
Full text蔣雅芬. "平均數分析中臨界值計算研究." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/91880163586645060949.
Full text林明勝. "水平地盤受震反應之數值分析." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/77627232578041415118.
Full textHuang, Hsin-Yuan, and 黃信元. "部分飽和土壤坡地穩定動態數值分析." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/24620148562906766391.
Full text國立臺灣大學
土木工程學研究所
87
This study integrates the finite element method and the limit equilibrium method with seepage model of groundwater — FEMWATER (Yeh , 1989) to determine the factor of safety and its stability in general soil slope. Using the finite element method to analyze the distribution of groundwater in regional areas, and consider the time variable in unsteady problem by central finite difference scheme. In a one dimensional non-leaking aquifer, the accuracy of numerical solution is demonstrated by comparing with analytical solutions. Furthermore, the finite element method with the constitutive law of geologic materials is used to compute the distribution of stress and strain for any general slope. A procedure to determine the most possible fractured profile is developed in this study. Assuming that shear is proportional to the interfacial height of slices, the stability of the slope and its safety factor on the slip profile can be computed from the limit equilibrium method with the force and moment equilibrium equations. This study improves the old iterative method to solve the safety factor. The interfacial shear force obtained by this study is different from those by method of Morgenstern & Price (1965), but normal forces show very close results. Safety factor obtained by present method is smaller than that of Morgenstern & Price (1965). Three model cases are investigated in this study, including the completely dry soil slope, the slope with a hard rock bed, and the one with some saturated groundwater. The result of first case shows that the sharper most possible fractured profile with smaller factor of safety, the bigger angle of the slope. In the second case, it is shown that the existence of hard rock bed in the slope affects the location of most possible fractured profile and its factor of safety. Effects of groundwater table on slip surface and safety factor are demonstrated in the third case. Comparatively, the infiltrated water on the top of slope also increases the loading of soil and decreases the value of safety factor, but its degree of effect is not as serious as the increase of groundwater table does. Finally, the result of the dynamic model case is latter one. As time goes by, the groundwater table rises from the bottom of the slope, the region of slip profile becomes bigger and the factor of safety gets smaller because of the decrease of effective stress, especially when the groundwater table touches the slip profile.
吳靜怡. "分析實驗數據的均值與分散度之研究." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/92864168697302491861.
Full text李文鐘. "非等值凝聚力黏土邊坡變分穩定分析之數值研究." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/73577835201450642639.
Full textHUANG, ZHENG-YI, and 黃正一. "三維裂紋體權衡函數之數值分析與探討." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/51912415144579985640.
Full textSU, PING-HE, and 蘇平和. "低雷諾數粘性流體模口膨脹之數值分析." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/44733233385782595393.
Full textHuang, Jiun-Hau, and 黃俊豪. "擋土排樁穩定邊坡-數值分析初探." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/25640427878024221128.
Full text陳加乘. "潛盾工程之合理化數值分析探討." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/79542190638705954965.
Full text中華大學
土木工程學系碩士班
90
In this paper, the finite element method is introduced to analyze the land subsidence due to shield tunneling. First of all, the rationalized numerical analysis procedures are investigated. The influence factors on the analysis include the range of the stratum, the choice of soil parameters, the layered effect of soil medium, the dimension analysis and the variation of ground water, etc. Finally, the numerical results due to the real tunneling are compared with the monitoring data and the results based on experience-based formula. The investigations can be as a basis to evaluate the impact on neighbor buildings by shield tunneling construction.
彭勳章. "澆注與凝固過程之三維數值分析." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/42053919614643393946.
Full text國立成功大學
工程科學系
87
A casting process, including both filling and solidification processes, is a transient thermal flow problem with free surface and latent heat. The computer simulation of the process can simultaneously predict flow and temperature fields, which can assist quality control, mold design, etc. For filling processes, the conserved scalar method combined with the VOF method is used to build a new model with an improved scheme of flow-rate control. The flow-rate control scheme can make the relative error of flow volume in a mold (at any time step) less than 0.01% without increasing computing time. As compared to the VOF method, for example, in the broken dam problem, the profile of free surface obtained by the proposed model is very similar to that of the VOF method. For the solidification process, the effective specific heat method is utilized to handle the latent heat while solving the energy equation. The concept of the temperature recovery method is applied to compensate the heat loss of the effective specific heat method, which can lead to more accurate results. The computational results of filling process show that for either Froude number less than 1 or more than 1, the flow pattern is three-dimensional and can not be regarded as two-dimensional. Two-dimensional models can only be applied to a casting thick enough. From the computing results of the 3-D solidification model, the convective effect of flow field, which can be ignored after the filling process is complete, is influenced rapidly by the solidification process for both Froude number and Biot number less than 1. As compared to the experimental result of Lao, without considering the effect of flow field, the simulation result is similar to Lao’s. The accurate material properties are needed if the effect of flow field is considered.
Chang, Yao-sheng, and 張耀升. "承載式岩栓破壞模式之數值分析." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/70633674748296817493.
Full textHUANG, WEN-KUI, and 黃文癸. "船舶外圍流場之數值模擬與分析." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/51067157318714474569.
Full text葉生偉. "微熱管熱傳特性之數值模擬分析." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/25077740995563970699.
Full textPan, J. M., and 潘誌銘. "圓錐液壓軸承之數值模擬與分析." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/46952861711362558535.
Full textDU, YI-CHENG, and 杜逸成. "超音速彈體之空氣動力數值分析." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/74194822804710712892.
Full textPing-Yuang, Cheng, and 陣娉嫄. "HJB 方程有限差分方法數值解的穩定分析." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/46170781666480088552.
Full text東海大學
數學系
96
The synthesis of robust controller for nonlinear systems is still an active problem in control society. It relies on finding the associated value function from Hamilton-Jacobi-Bellman (HJB) equation. Owing to the reason that HJB equation via dynamical programming principle is not analytic solvable, we build it's numerical approximation by finite difference method. The stability of numerical schemes in solving HJB equations is investigated in the thesis.
朱偉光. "人體主動脈剪力分佈之數值模擬與分析." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/59922058305523939669.
Full textFU, XUE-HONG, and 傅學弘. "封閉穴內水暫態自然對流數值分析." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/59290183999780412502.
Full textYANG, SHI-YING, and 楊世英. "俱地板之翼剖面噴射流場數值分析." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/83105263747925444097.
Full textWang, Guan-Ping, and 王冠評. "降雨導致填土邊坡破壞之數值分析." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/79530853576256370288.
Full textSun, Wei-Hsin, and 孫維新. "中口徑彈藥外彈道分析之數值技術." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/89956064089119952953.
Full text中正理工學院
兵器工程研究所
86
ABSTRACT The aerodynamic behavior and the external ballistic trajectory of a projectile during flying were analyzed by employing a CFD solver in present study. Nowadays there are three general methods appeared to handle the problem of aerodynamic resistance：（1）the design of projectile’s geometry with low drag.（2）the variation on the shape of boattail, and（3）the adoption of the bass bleed technique. According to the aforementioned considerations, present study focused on the effect of the boattail configuration on the aerodynamic characteristics of an axisymmetric SOCBT projectile. Using 20mm projectile as further research models, the aerodynamic characteristic and flow field with and without bass bleed techniques were also simulated. The governing time-averaged Navier-Stokes equations were solved by an improved control volume method, An upwind flux-difference split scheme was employed for spatial descretization, and an explicit optimally smoothing multi-stage scheme for the time integration. To simulate the behavior of highly rotating and base bled 20mm projectile, both the Baldmix-Lomax algebraic turbulence model and the non-reactive species equation were included in the computation. In these ways, the turbulence effect and the complicate phenomena caused by mixing flow can be exhibited. Finally, the aerodynamic characteristics for different types of projectiles with and without base bleed can be simulated. Furthermore, both the reduction of base drag and the extension of range of projectiles can be accomplished by adopting the well-designed boattail’s shape and the adding of suitable amount of base bleed jet. There fore, the results of present study can be considered as a reference for a design engineer in related field.
鄧泉勇. "凸面薄膜冷卻數值模擬分析與研究." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/18397642400381334304.
Full text國防大學中正理工學院
兵器系統工程研究所
89
The purpose of this thesis is to analysis the film-cooling effectiveness under various parameters, including cooling jet angle, cooling jet spanwise angle, and coolant-to-freestream blowing ratio. Computations are performed to simulate a discrete hole film cooling over a convex surface. In order to simulate the complicate flow phenomena, a multi-block, three-dimensional Navier-Stokes commercial code, CFX, has been used to compute heat transfer coefficient on a film-cooled surface, with 5 film-cooling holes in a row. The low-Reynolds number k-ε turbulence model is also used for turbulence closure in the present work. To the row, the hole angle to the spanwise direction includes 0o, 35o and 45o, and to the streamwise direction includes both 35o and 90o are applied in the research, meanwhile, there are six coolant-to-freestream blowing ratios, 0.5, 0.75, 1.0, 1.25, 1.5 and 2.0, which were simulate too. There are two conclusions, which were found from the given parameters and the computational results. It is more effectiveness as the blowing ratio is 1.25 and the hole angle to the freestream direction is 0o. On the other hand, as the hole angle to the freestream direction is 90o, the cooling efficiency would lower than the other angles.
陳之馨. "澎湖峽谷數值地形模型之分析模擬." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/25407107879195804448.
Full text林晃. "脫殼穿甲彈之流場分析與數值模擬." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/17120505192673936547.
Full textYANG, CHONG-REN, and 仰崇仁. "旋轉直管流的數值計算及熱傳分析." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/80714551787950090859.
Full textLai, PoLun, and 賴伯倫. "小波理論於數值地形模型之多重解析度分析." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/54375425508239907472.
Full text國立臺灣大學
土木工程學研究所
87
Nowadays, the Digital Terrain Model (DTM) has been an important data source in many application fields. In order to integrate DTM with other image source such as remotely sensed images in an more efficient way, we need to process DTM via an effective approach, and the Multi-Resolution Analysis (MRA) is just the prevailing analysis model. In recent years, the Wavelet Theory which was successful in signal and image processing has supported a fast and effectual method to the MRA. In this study, we proceed from the fundamental concepts of wavelet theory first, and then take the evidence in the experiment to assess and investigate the feasibility of wavelet-based multi-resolution analysis with DTM data. In the experiment we choose three wavelet in matrix form - Haar transform, Daubechies D2 transform, and quadratic spline W-matrix. The analysis result shows that different wavelet adapt to different sort of terrain, due to their inherent characteristics. In the second place, the high-frequency information in the wavelet transform coefficients can be a secundum of selecting characteristic points. Compared with the method of Very Important Points (VIP) algorithm, we concluded that the points selected by the wavelet transform have more reliability and consequently the method can be an considerable reference of DTM analysis, compression, reduction, and presentation.
TSUNG, CHEN HSI, and 陳翕琮. "空調室內氣流分佈與舒適度之數值模擬分析." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/19163262160685470602.
Full text中正理工學院
兵器系統工程研究所
88
Abstract The air conditions in a specified room are normally determined by either experimental approach or numerical approach. In scope of experimental approach, flow visualization and image methods as well as direct instrumental techniques are widely adopted. For example, the motion direction of object affected by the air flow can be considered as an index of performance of a ventilation system. By inserting a pitot tube and thermocouple in the test section, the flow field and temperature field can be determined by recorded data. Therefore, the quality and detail information of the ventilation system can be evaluated. However, the cost and time consumptions of experimental work are comparatively high as compared with the numerical approach. Moreover, detail correlations are also required in the data analysis of experimental study. Therefore, a numerical model on the near field flow environment can be used to reduce the development and measurement costs, and also to provide detailed information needed for the proper structural design and the determination of the recirculation environment. The present study aims to study the mixed convection problem by employing a computational fluid dynamic (CFD) technique. The CFD technique has been proved to be an effective tool in treating such complex thermal-fluid dynamic phenomena. The conservation laws of continuity equation, momentum equation, and energy equation are solved simultaneously by numerical differencing scheme. According to literature, there is no one single turbulence model can simulate such complex thermal-fluid dynamic phenomena in the ventilation system. Therefore, the present study also intends to find out the most appropriate turbulence model to simulate this thermal-fluid flow field. The comparison made with experimental data shows that the present results demonstrate a reasonable trend in fluid motion. Finally, the most appropriate turbulence model was chosen to simulate the multi-room models. The characteristics of different models were analyzed according to these numerical results and the optimum design of ventilation system was found. Two commercial packages are introduced in the present study, the grid generator, ICEM/CFD, and the CFD solver, CFX4.3. The Predicted Mean Vote（PMV）model was used to analyze the numerical results, and the condition settings (Temperature、Velocity and Humidity) of an air conditioning system for the best thermal comfort of various cases were obtained. It is believed that the present results can be used for improving the design of the air conditioning system and the thermal comfort of multi-room models.
Xu, Fu-Yuan, and 許富源. "積層樑考慮熱應力的理論與數值分析." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/38525484483107678715.
Full text蔡孟霖. "SCM在漸變斷面梁上的數值分析之研究." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/11221994406175647688.
Full textCHEN, JIAN-LIN, and 陳建霖. "多孔性噴流延伸器黏性流之數值分析." Thesis, 1986. http://ndltd.ncl.edu.tw/handle/32510331293800597224.
Full textCHEN, YU-REN, and 陳裕仁. "砂模鑄造之數值模擬分析(邊界曲率法)." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/36900805102215738039.
Full textChen, Yu-Wei, and 陳渝瑋. "數值分析震波對壁面熱傳效應之影響." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/37932504868439311718.
Full text中華大學
機械與航太工程研究所
95
Numerical simulations of shock wave passing through a two-dimensional backward-facing step channel are performed to investigate the effects of shock wave Mach number, channel step height, and channel bottom wall temperature variation on the flowfield structure and heat transfer. The compressible Navier-Stokes equations governing the flowfield in planar coordinates are discretized using the fifth order accuracy Weighted Essentially Non-Oscillatory (WENO) and the fourth order accuracy central difference schemes for the convective and diffusive terms, respectively. The governing equations are integrated with the fourth order accuracy Runge-Kutta scheme. Computed results show that the interactions of the step corner induced vortex with the reflected shock waves from the walls form complicated flow structures. The effects of shock wave Mach number, channel step height, and channel bottom wall temperature variation on the heat transfer are characterized by the nondimensional parameter, Nusselt number. The variation of wall temperature is represented by Rayleigh number. For the fixed shock wave Mach number condition, the calculated local Nusselt number increases with increasing the step height and Rayleigh number. For the fixed Rayleigh number condition, the calculated Nusselt number decreases with increasing Mach number but increases with increasing step height.