For the displacement sensitivity and positioning accuracy of transmission system , guide linearity , the detecting process and detecting result are expatiated 重點闡述了傳動系統(tǒng)位移靈敏度、導軌直線度、傳動系統(tǒng)定位精度的檢測過程和檢測結(jié)果。
For the transmission system ' s the least displacement sensitivity , affection factors of positioning accuracy , system toughness and natural frequency , the paper calculates them carefully . through a great deal of work as above , we affirm that the project of total structure design is feasible 對于該傳動系統(tǒng)的最小位移靈敏度、定位精度的影響因素、系統(tǒng)剛度及固有頻率都進行了細致的計算,肯定了所提出的結(jié)構(gòu)設(shè)計方案。
This thesis deduces computational formulations of displacement sensitivity and stress sensitivity in structural shape optimization considering geometric nonlinear element . in the calculation of stress sensitivity , the modules required to cut the stiffness matrix of node coordinates few . in order to simplify calculation and make program conveniently , this thesis uses half - parser method 在空間剛架結(jié)構(gòu)的形狀優(yōu)化設(shè)計中,關(guān)鍵的一項工作就是計算應力靈敏度,在計算應力對剛架結(jié)構(gòu)形狀優(yōu)化的設(shè)計變量? ?結(jié)點坐標的靈敏度時,需用到單元剛度矩陣對結(jié)點坐標的導數(shù)。
Abstract : this paper studies the sensitivities in the structural optimization of the sheet cover , including the stress sensitivity and the displacement sensitivity as well as the eigenvector sensitivity . the sensitivities are solved by the finite element method . a beam element and a plate element are used for the structural analysis of the sheet cover . some equations about the sensitivities are given out and are applied to the structural optimization of the sheet cover . the results prove to be satisfactory 文摘:分析了在薄壁覆蓋件結(jié)構(gòu)優(yōu)化中應力敏度和位移敏度的計算方法,利用有限元法進行結(jié)構(gòu)分析和敏度計算,推導出敏度的計算公式,并應用于薄壁覆蓋件的結(jié)構(gòu)優(yōu)化設(shè)計,得到了滿意的結(jié)果.薄壁覆蓋件的有限元分析采用了板單元和梁單元,應用實例的計算結(jié)果表明,應力敏度、位移敏度等的計算方法準確、可靠
In order to study the thermal performance and residual stress of microelectronic subassembly , in this paper , a newly optical interferometry method for 3 - d displacement measurement is developed based on wavefront interference theory . in which the moire interferometry provide the in - plane displacement , but the system is different from the conventional interferometry , the system applies the double diffraction of the specimen grating , the in - plane displacement sensitivity is a factor of 2 higher than that of the conventional moire interferometer . twyman / green interferometry method for out - of - plane displacement measurement is adapted , the advantages of the optical set - up are structure novelty , and the fringe patterns of the displacement fields shown high contrast and spatial resolution 為了詳細研究試件的熱變形特征以及殘余應力的影響作用,本文在波前干涉理論的基礎(chǔ)上,設(shè)計了一新型三維光學測試系統(tǒng),該系統(tǒng)的平面位移測試基于云紋干涉方法,但采用與普通云紋干涉不同的光路系統(tǒng),利用試件光柵和平面反射鏡組形成的兩次衍射,使平面位移干涉條紋倍增,測量靈敏度是普通云紋干涉的2倍,系統(tǒng)的離面位移場測試采用泰曼格林干涉光路。