皮芯法 的英文怎麼說
中文拼音 [píxīnfǎ]
皮芯法
英文
core-sheath method-
Study on the cross section morphology and skin - core structure of pan fiber in wet - spinning
濕法紡聚丙烯腈纖維的截面形貌與皮芯結構的研究To eliminate or lessen the system errors caused by the offset and slope of the thin aluminum sheet when measuring its surface, and to avoid over - cutting while machining the honeycomb surface, the saddle - point programming is applied to the position optimization of the theoretical surface. to generate the cnc program of the honeycomb sandwich, the equidistant calculation of the actual surface is produced and the data processing software is developed
利用鞍點規劃方法優化理論橢球面的位置,使實測曲面相對理論橢球面的最大法向誤差達到最小,減少或消除了蒙皮內表面測量時由於定位的偏心或歪斜引起的系統誤差,使誤差均化,防止了配對加工蜂窩夾芯表面時少切或過切現象的發生。To solve this difficult problem, this paper presents an innovated digital matching machining method, which integrates many techniques such as curved surface automatic tracking, data acquisition, mathematical analysis, cnc and digitizing. a new algorithm is introduced to track and sample a large - scale rotary surface with the use of three - dimensional scanning probes
研究了蒙皮內表面的數字化採集技術,提出了採用三維掃描測頭進行大型不規則回轉面自動跟蹤測量的控制演算法及密集數據採集方法;研究了蜂窩夾芯表面的數字化加工技術,提出了以回轉軸為基準的隨動控制插補方法。As the inner shape of the thin aluminum alloy sheets will deform and differ from the theoretical ellipsoid to some extent after welding processing, it is very difficult to meet the requirements of the tolerance between the honeycomb sandwich and thin aluminum sheets when only conventional cnc and traditional manual manufacturing techniques are used
由於上、下底蒙皮焊接成型過程中的變形使其內表面形狀相對于理論橢球面具有較大的誤差,採用常規的橢球面數控加工方法,或傳統的按上底蒙皮內表面手工打磨、研合修配方法加工蜂窩夾芯表面無法保證配合精度要求。Pare off the skin of pears and remove the core. peel the lemon and orange, set aside
製法: 1 .先將啤梨去皮、去芯,將檸檬和橙去皮,置於一旁備用。The rayleigh - ritz method is used to lead to analytical expressions for the stiffness and mass matrices and load vector as well as their sensitivities, which uses the simple polynomials to define assumed displacement functions, geometry and construction of wing structures. excluding some selected terms from the displacement functions or using stiff springs at the specified locations imposes boundary conditions. the accuracy of calculated results is improved by including transverse shear effects and using multiple sets of ritz functions in the analysis
它使用簡單多項式作為ritz基函數、定義翼面的幾何和結構參數,利用rayleigh - ritz方法導出翼面結構的剛度矩陣、質量矩陣和載荷向量及其靈敏度的解析表達式,通過排除位移函數中某些選定的項或在指定點使用約束彈簧施加各種邊界條件,考慮橫向剪切變形和使用多組ritz基函數改進分析的質量,使用等效蒙皮和等效夾芯技術提高計算效率。分享友人