部分應力模式應用於一階層板理論

[[abstract]]本文結合一階層板理論與Partial Hybrid Stress Method,PHSM),對直交異向性 積層板而言,可修正Hellinger-Reissner principle,於撓曲部分包含.sigma.x, .sigma.y,.tau.xy,橫向剪力部分 (.tau.xz,.tau.yz)則以橫向剪應 力場假設之,經由修正的Hellinger-Reissner principle可推導得PHSM的元素勁度矩陣為撓 曲部分之位移法勁度矩陣與橫向剪力部分之 hybrid法勁度矩陣之和。在薄板,中厚板及厚 板的位移分析與應力分析中,PHSM獲得遠較一 階層板理論之有限元素位移法精確的結果,在 位移分析與沿著積層板厚度方向的橫向剪應力 ,PHSM甚至可得到優於高階層板位移法的結果 。[[abstract]]The PHSM (Partial Hbyrid Stress Method) Hellinger-Reissner principle applied to the first-order plate theory is established for orthotropic laminated plates in this paper. .sigma.x, .sigma.y, .tau.xy, are included in the flexural part, and assumed transverse shear stresses (.tau.xz, .tau.yz) are included in the transverse shear part. Through variation, the stiffness of PHSM is the assembly of the flexural stiffness by displacement formulation and of the transverse shear stiffness by hybrid formulation. For displacement and stress analysis of thin, moderately thick and thick laminated plates, PHSM obtains much better results than the finite element displacement formulation of first-order plate theory. Moreover, PHSM is better than displacement formulation of higher-order plate theory in the displacement analysis and the through thickness distribution of transverse shear stress.[[sponsorship]]中國機械工程學會; 清華大學動力機械研究所; 行政院國家科學委員會[[notice]]補正完畢[[conferencetype]]國內[[conferencedate]]19901110~19901111[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]新竹市, 臺

关于经济统计学若干问题的思考

In this article, authors discuss the property of economic statistics as a subject, the prospect of economic statistics and educational pattern of this specialty, and explain their position on these issues

关于经济统计学若干问题的思考

In this article,authors discuss the property of economic statistics as a subject,the prospect of economic statistics and educational pattern of this specialty,and explain their position on these issues

The Innovations on Educational Reform of Economic Statistics

本文介绍了近日获得国家级教学成果一等奖的统计学教学成果的基本内容,主要包括:制定新的教学规范、界定培养目标、设计课程体系和教学内容、编写系列教材、推动教学改革、构建新交流平台等。We introduce our achievements in economic statistics education,which has been awarded the first prize of National Award on Educational Reform Achievements.The innovations include: the development of new teaching standards,defining training objectives,designing the curriculum and teaching content,the preparation of series of teaching materials,promoting the teaching reform,and building a new exchange platform

部份應力模式有限元素法應用於雙模數積層板之靜力分析

[[abstract]]本文結合高階層板理論與部分應力模式有限元素法,完成雙模數積層板之位移與應力分析。雙模數複合材料性質具有不同的伸張和壓縮彈性模數,造成中性面將偏離幾何中面,需以疊代法求之。高階層板理論可模擬斷面扭曲,而且不需橫向剪力修正函數即可預測橫向剪力變形;而部分應力模式的優點是能解決橫向剪應力於積層板層間介面不連續的問題,故能正確地求得沿板厚度方向的分布,因而本文得到優於位移有限元素法之位移與應力分析。[[sponsorship]]中華民國結構工程學會; 中國土木水利工程學會; 成功大學土木工程學研究所[[conferencetype]]國內[[conferencedate]]19960901~19960903[[iscallforpapers]]Y[[conferencelocation]]屏東縣, 臺

以動力勁度法結合級數解分析平面變曲率拱

[[abstract]]曲線形桿件常應用於許多土木、機械和航空結構中，例如拱結構、環梁結構和薄殼結構之加勁環肋等。一般而言，圓拱(定曲率拱)具有理論解，但變曲率拱則無法求得理論解，基於包含轉動慣量及剪力變形之平面變曲率拱，本文結合動態勁度法及級數解求取平面變曲率拱面內( in-plane )自由振動分析及動態分析。[[sponsorship]]中華民國結構工程學會; 中國土木水利工程學會; 臺灣科技大學營建系暨研究所[[conferencetype]]國內[[conferencedate]]19980909~19980911[[iscallforpapers]]Y[[conferencelocation]]臺北市, 臺

高階層板理論之部分應力模態有限元素法

[[abstract]]本文將部分應力模態(Partial Hybrid Stress Method,PHSM)應用於高階層板理論。 針對直交異向性積層板,修正 Hellinger-Reissner principle,於撓曲部分 包含撓曲應力(.sigma./sub x/,.sigma./sub y/,.tau./sub xy/),橫向剪力部分則以橫向剪應力場 (.tau./sub xz/,.tau./sub yz/)假設之,經 由變分可推導得PHSM的元素勁度矩陣,在撓曲 部分為位移法勁度矩陣,而在橫向剪力部分則 是 hybrid法勁度矩陣。於薄板,中厚板及厚板 的位移與應力分析中,本文方法精確度與 hybrid法類似,但應力參數則減少許多。而本 法遠較位移法精確,更可改進沿積層板方向橫 向剪應力分布。[[abstract]]The PHSM (Partial Hybrid Stress Method) Hellinger-Reissner principle applied to the higher-order plate theory is established for orthotropic laminated plates in this paper. .sigma./sub x/, .sigma./sub y/, .tau./sub xy/ are included in the flexural part, and assumed transverse shear stresses(.tau./sub xz/, .tau./sub yz/) are included in the transverse shear part. Through variation, the stiffness of PHSM is the assembly of the flexural stiffness by displacement formulation and of the transverse shear stiffness by hybrid formulation. For displacement and stress analysis of thin, moderately thick and thick laminated plates, PHSM obtains much better results than the finite element displacement formulation of higher-order plate theory. Moreover, the through thickness distribution of transverse shear stress is greatly improved.[[sponsorship]]中華民國力學學會; 中央大學; 教育部[[conferencetype]]國內[[conferencedate]]19901214~19901215[[conferencelocation]]中壢市, 臺

In-plane vibration of laminated curved beams with variable survature by dynamic stiffness analysis

[[notice]]本書目待補

高階梁理論於三明治梁之有限元素法挫屈分析

[[abstract]]本文以高階梁有限元素法完成三明治梁之 挫屈分析,但一般文獻中挫屈荷載為中間軸合 力,本文則探討荷載為沿梁深度方向為均佈的 軸向應力,因而相對應的薄膜應變乃包含梁剖 面上為非線性變化之位移場之影響,故本文方 式可完整地考慮高階梁理論之非線性位移場對 梁臨界挫屈荷載的影響;經由擾動的觀念,可推 導得與前人不相同之有限元素法控制方程式, 並完成數值計算。與理論解比較在對稱堆疊三 明治梁臨界挫屈荷載實例分析中,本法皆顯現極佳的收斂性及精確度。[[abstract]]In this paper, the higher-order beam theory is used in the buckling analysis of sandwich beam. Instead of midplane force, the buckling loading is considered to be uniformly distributed stress through the thickness. Accordingly, the corresponding membrane strain includes the effect of warping on the buckling load. The finite element formulation is derived through perturbation. Compared with the analytical solution, excellent accuracy and fast convergence are observed in the present study.[[sponsorship]]成功大學土木工程研究所; 中國土木水利工程學會; 教育部[[conferencedate]]19931015~19931016[[booktype]]紙本[[iscallforpapers]]Y[[conferencelocation]]臺南, 臺