[[alternative]]The analysis of performances of aircraft on the atmospheric disturbance

[[abstract]]飛機在大氣擾流中飛行,其遭受的隨機外 力衝擊造成飛機姿態角(Attitude Angle)及軌跡 (Trajectory)隨時間任意變化,運動參數時間反應 的強弱(Intensity)與擾流大小(Scale)有嚴密關係,不僅加重結構和駕駛員的負擔,也令乘客產生 不舒適(Uncomfortable),甚至不可接受(Unacceptable)的 搭乘感覺。因此我們希望經由飛機在大氣擾流 中的飛行反應,了解飛機在這些飛行狀況的特 性,藉此改善飛航安全,增加乘客搭載的舒適性。本文分別用不同方向:垂直向上陣風(Vertical Wind Gust)和水平逆向陣風(Horizontal Head Wind),及強 弱度的變化,對Boeing-747型飛機在不同飛行狀況 下,各飛行參數的時間反應以了解飛機特性,再 利用不同動力模擬系統:Laplace轉換法,線性、非 線性擾動直接積分法,比較各動力模擬系統的 可行性及實用性。[[abstract]]An aircraft is always flying in a turbulent atmosphere, and suffers the impact of atmospheric gust winds. The net effect is that this aircraft will change its attitude angle, altitude, and trajectory in a almost randomly fashion, and represents a severe hazard in aviation safety problem. The purpose of this project is to understand the response behavior of several types of aircraft under different gust wind models, in order to investigate the flight characteristic conditions, and improve their flight safety situations. Through the use of four different methods such as Laplace transfer, linear and nonlinear equations of motion, the Boeing 747 transport aircraft's response behavior were fully investigated and compared under vertical wind gust and horizontal head wind influences. Results show that the two Runge-Kutta methods agree well, and will be the best compromise of accuracy and realistic response.[[sponsorship]]中華民國力學學會; 台灣大學; 教育部[[notice]]20130320格式已修正by陸桂英[[conferencetype]]國內[[conferencedate]]19931210~19931211[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]臺北市, 臺

A Tutorial on Finite Element Analysis of Straight-Tube Coriolis Flowmeters

[[abstract]]It has been more than fifteen years since finite element method was implemented to the analysis of Coriolis flowmeter. While most of the literature provided only part of the procedures on constructing the matrix system equations which is to be solved for the natural frequencies and mode shapes. In this paper, we intend not only to provide a detail derivation on the governing equations via Hamilton's principle, but also to determine the weak form of equations of motion by virtue of Lagrange's equation, instead of going through a tedious variational or weighted residual method. The formulation is based on the assumptions that the pipe was represented as a Timoshenko beam possessing stiffness and mass while the fluid was idealized as incompressible and in viscid.[[notice]]20130320格式已修正by陸桂英[[conferencetype]]國內[[conferencedate]]20061215~20061216[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]臺北市, 臺

[[alternative]]The store flow field computation on an unstructured grid

[[sponsorship]]中華民國力學學會; 清華大學; 教育部[[notice]]20130320格式已修正by陸桂英[[conferencetype]]國內[[conferencedate]]19941209~19941210[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]新竹市, 臺

[[alternative]]Analysis and Calculation of Transient Response of a Surface Crack Subjected to a Dynamic Anti-Plane Moving Loading

[[abstract]]本文利用拉普拉斯域之裂紋曳引力與位移基本解以及引用Cagniard-de Hoop積分路徑變換法，來分析垂直表面裂紋受一沿邊界等速移動動力點載荷之動力破壞問題，透過拉普拉斯轉換域中基本解的疊加與映射法的分析，獲得時域中之應力、位移與應力強度因子的完整顯式解，且理論上此解析解適用於應力波經長時間後的探討與分析。數值結果顯示，隨著載荷移動速度越快，相同觀察點所得到的應力值在入射波與反射波通過後則衰退的越快，在三次繞射波與反射波通過後則漸趨於零。而應力強度因子則隨著載荷移動速度加快，在一次繞射波通過後即迅速衰退，在三次繞射波通過後則亦漸趨於零。[[abstract]]In this study, the transient full-field solution of a surface cracksubjected to a dynamic anti-plane moving loading is investigated. Thesolution is determined by superposition of proposed fundamentalsolutions in the Laplace transform domain. The fundamental solutionsto be used are the problems for applying exponentially distributedtraction and screw dislocation on the crack faces and along the cracktip line, respectively. The exact transient closed form solutions ofstresses, displacement, and dynamic stress intensity factor areobtained and expressed in compact formulations. The solutions arevalid for an infinite length of time and have accounted for thecontributions of an infinite number of diffracted and reflected waves.Numerical calculations for a moving loading and a stationary loadingare evaluated and discussed in detail.[[conferencetype]]國內[[conferencedate]]20001209~20001210[[iscallforpapers]]Y[[conferencelocation]]桃園縣, 臺

攜帶式圓盤式直接甲醇燃料電池的設計與製作

[[conferencetype]]國內[[conferencedate]]20071221~20071222[[iscallforpapers]]Y[[conferencelocation]]高雄, 臺

表面裂紋承受反平面移動動力載之暫態全場解析與計算

[[conferencetype]]國內[[conferencedate]]20001209~20001210[[iscallforpapers]]Y[[conferencelocation]]桃園縣, 臺

[[alternative]]低軌道衛星組的設計

[[conferencetype]]國內[[conferencedate]]19951208~19951209[[iscallforpapers]]Y[[conferencelocation]]桃園縣, 臺

Transient Analysis of an Interface Crack between Two Dissimilar Piezoelectric Materials

[[conferencetype]]國內[[conferencedate]]20091113~20091114[[iscallforpapers]]Y[[conferencelocation]]苗栗, 臺

[[alternative]]The general singular similarity solutions of Laplace's equaiton with their applications

[[conferencetype]]國內[[conferencedate]]19931210~19931211[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]臺北市, 臺