非機(jī)械性激光多普勒測(cè)速儀的二維速度測(cè)量外文文獻(xiàn)翻譯@中英文翻譯@外文翻譯

1 外文翻譯 畢業(yè)設(shè)計(jì)題目 : 中厚板板形儀長(zhǎng)度檢測(cè)系統(tǒng)設(shè)計(jì) 原文 1: Nonmechanical scanning laser Doppler velocimeter 譯文 1: 非機(jī)械破碎的掃描激光多普勒測(cè)速儀 原文 2: Theory for plates of medium thickness 譯文 2: 中厚板理論 9 譯文 1 非機(jī)械性激光多普勒測(cè)速儀的二維速度測(cè)量 浩一丸 *和孝弘羽田孜 1. 緒論 激光多普勒測(cè)速儀（ LDV）已經(jīng)被廣泛地使用在許多研究和工業(yè) 生產(chǎn)中用來(lái)來(lái)測(cè)量物體、流體的速度，因?yàn)槠錈o(wú)創(chuàng)性，精細(xì)的空間的分辨率和線性響應(yīng)。在光學(xué)機(jī)構(gòu)中，各種用于機(jī)械掃描測(cè)定位置的技術(shù)已經(jīng)成熟運(yùn)用 1-6。在實(shí)際應(yīng)用中，具有結(jié)構(gòu)緊湊，易于來(lái)處理特點(diǎn)的 LDV 傳感器探頭是可取的。如果打算應(yīng)用常規(guī)掃描技術(shù)的一個(gè) LDV 探針，那么它在探頭內(nèi)的使用的移動(dòng)機(jī)構(gòu)是必不可少的。然而，探頭內(nèi)的移動(dòng)機(jī)構(gòu)可以很容易地因?yàn)閷?duì)齊或從機(jī)械沖擊而損壞，探頭也難以小型化。 為了克服這些缺點(diǎn)，在常規(guī)的掃描技術(shù)的基礎(chǔ)上，作者提出了沒(méi)有任何移動(dòng)的機(jī)制的探針掃描 7-10。在這些 LDVS 中，該掃描功能是可 以通過(guò)改變輸入到探頭的光的波長(zhǎng)和衍射光柵掃描光束，和衍射光柵掃描光束，而不是使用移動(dòng)機(jī)構(gòu)都包含在探頭。然而，掃描的方向被限制在一個(gè)軸向方向，即，平行于光軸的方向軸，或橫向方向， 在這些 LDVS 的光軸垂直的方向上。 測(cè)量位置為流量的橫截面上的一個(gè)二維掃描的液體流的速度分布的測(cè)量的在許多應(yīng)用中是可取的。已報(bào)道一個(gè) LDV 測(cè)量接收光學(xué)系統(tǒng)中使用的塑料光纖陣列的多個(gè)位置的速度 11,12， 雖然測(cè)量位置在一維分布并且在一個(gè)機(jī)械的階段，卻已被用于二維速度測(cè)量。 在本文中， 我們提出了一個(gè)非機(jī)械的，可以在二維平面上的橫截面平面 垂直于流動(dòng)方向的掃描，沒(méi)有任何移動(dòng)機(jī)構(gòu)在其探頭的掃描 LDV。 結(jié)合波長(zhǎng)的變化，以及探頭的光纖陣列輸入端口的變化用于執(zhí)行測(cè)量位置的二維掃描。我將分別從 理論和實(shí)驗(yàn)證明這種掃描功能。 2. 原理 A. 二維掃描的概念 建議的非機(jī)械二維掃描 LDV 的概念示于圖 1 中 。如圖所示， LDV 包括的傳感器探頭包括一個(gè)衍射光柵和主體，該主體包括一可調(diào)諧激光器和光開(kāi)關(guān)。在主體和探針連接的光纖陣列和電纜。從可調(diào)諧激光器的光束由光開(kāi)關(guān)激發(fā)， 通過(guò)光纖陣列中的纖維，然后被輸入到傳感器探頭。在探頭中，從其中一個(gè)光束光纖陣列端口進(jìn)入的光束進(jìn)過(guò)校直，入射 到衍射光柵。當(dāng)入射角度為0 度時(shí)，光束對(duì)稱(chēng)衍射。 該第一和第一級(jí)衍射光束被反射鏡反射，并相互交叉在測(cè)量位置。 最佳 10 的散射光束的拍頻信號(hào)來(lái)自發(fā)光二極管。信號(hào)隨后被轉(zhuǎn)移在主體中，信號(hào)分析器隨后計(jì)算出結(jié)果。 在這種結(jié)構(gòu)中，可調(diào)諧激光器和衍射光柵的光開(kāi)關(guān)和光纖陣列相結(jié)合用于在兩個(gè)維度掃描測(cè)量位置。從測(cè)量位置沿軸向掃描，通過(guò)改變輸入得到探頭的光的波長(zhǎng)。這和我們已經(jīng)報(bào)道的方法相類(lèi)似 7。光柵的衍射角隨波長(zhǎng)變化。在測(cè)量點(diǎn)位置可以進(jìn)行掃描。一個(gè)橫向掃描功能是通過(guò)以下方式獲得 不斷變化的 的光纖陣列 光開(kāi)關(guān) 的端口。 橫向 測(cè)量的位置依賴(lài)于 輸入位置的光束探頭。因此，當(dāng)在橫向方向上移動(dòng) 了 光束輸入的位置時(shí)，測(cè)量位置也常在在橫向方向上移動(dòng)。 是因?yàn)?可調(diào)諧激光器和光開(kāi)關(guān)是可以分開(kāi)的探針，探針可保持簡(jiǎn)單，可靠。 圖 1 參考文獻(xiàn) 1 GR 格蘭特和 KL 奧爾洛夫，“雙色雙光束后向散射激光多普勒測(cè)速儀，” APPL。 OPT。 12， 2913 年至2916 年（ 1973 年）。 2 ， Y. Y. T.西川，北谷，米田野， T.山田，“空間相關(guān)測(cè)量的附加噴氣機(jī)通過(guò)新的掃描激光多普勒測(cè)速儀用衍射光柵，”第七次研討會(huì)對(duì)湍流（ 1981 年），第 380-389 頁(yè)。 3 B. F.德斯特，萊曼和 C 特羅佩亞，“激光多普勒流場(chǎng)快速掃描系統(tǒng)，”牧師科學(xué)。儀器和設(shè)備。 52，1676 至 1681 年（ 1981 年）。 4 P.斯利拉姆， S. Hanagud， J.克雷格， NM Komerath，“掃描激光多普勒流速剖面技術(shù)檢測(cè)移動(dòng)表面上” ； OPT。 29 日， 2409 年至 2417 年（ 1990 年）。 5 EB 李， AK 小芹，和世界青年園“在冷軋變形區(qū)的速度分布測(cè)量的掃描 LDV，”選件。激光工程。 35，41-49（ 2001）。 6 M. Tirabassi 和 SJ Rothberg，“掃描 LDV 楔形棱鏡，選件。激光工程。 47， 454-460（ 2009）。 7 K.丸“，軸向掃描激光多普勒測(cè)速儀采用波長(zhǎng)的變化不動(dòng)，在傳感器探測(cè)機(jī)制，” OPT?？爝f 19， 5960-5969（ 2011）。 8 K.丸， T.藤原， R.池內(nèi)，“非機(jī)械性的橫向掃描激光多普勒測(cè)速儀采用波長(zhǎng)變化，” APPL。 OPT。 50，6121-6127（ 2011）。 9丸和 T.羽田孜，“非機(jī)械軸向掃描激光多普勒測(cè)速儀與方向的歧視，” APPL。 OPT。 51， 4783-4787（ 2012）。 11 10 K.丸“，非機(jī)械雙軸掃描激光多普勒測(cè)速儀，” IEEE 參議員， J. 12 日， 2648 年至 2652 年（ 2012 年）。 11 T. Hachiga， N.古都， J.觀松， K.菱田， M.熊田，“發(fā)展的多點(diǎn)的 LDV 通過(guò)使用半導(dǎo)體激光器的基于FFT 的多信道信號(hào)的處理，用” Exp。流體 24， 70-76（ 1998）。 12 ， K. D.小林， S. T. Andoh H.石田， H.白河，秋口，上山， Y.倉(cāng)石， T. Hachiga，“微血管三維成像技術(shù)使用的多點(diǎn)激光 多普勒測(cè)速儀“， J.；物理 。 106， 054701（ 2009）。 13 JE 哈維和的 CL Vernold“的方向余弦空間衍射光柵的行為的描述，” APPL。 OPT。 37， 8158-8160（ 1998）。 14 M. Pascolini， S. Bonora， A. Giglia， N. Mahne， S. Nannarone， L. Poletto，“在一個(gè)圓錐形的衍射光柵安裝一個(gè)極端的紫外線時(shí)間延遲補(bǔ)償單色” ； OPT。 45， 3253-3262（ 2006）。 15 H.-E.阿爾布雷希特鮑里斯， N.達(dá)馬施克，和 C.特羅佩亞 ，激光多普勒和相位多普勒測(cè)量技術(shù)（施普林格， 2003 年），第 7.2 節(jié)。 16 ， Y.， Y.瀧田華啟青木， A. Sugama， S.青木， H.奧納卡，“ 4 4 光突發(fā)交換使用 PLZT 光束偏轉(zhuǎn)器的高速交換子系統(tǒng)與 VOA（ 10 微秒） “在光纖通訊研討會(huì)及展覽會(huì)和全國(guó)光纖工程師會(huì)議，技術(shù)精華（ CD）（美國(guó)光學(xué)學(xué)會(huì)， 2006 年），紙 OFJ7。 17 IM Soganci， T.種村， KA威廉姆斯， N. Calabretta， T. de Vries 先生， E. Smalbrugge， MK 斯密特， HJS Dorren 和華野，“高速 1 6 的 InP 單片集成光開(kāi)關(guān)，”訴訟 2009 年第 35 屆歐洲光通信會(huì)議（ ECOC 09）（ IEEE 2009）， 本文 1.2.1。 18 K.梨本， D. Kudzuma， H.漢，“高速開(kāi)關(guān)和過(guò)濾使用 PLZT 波導(dǎo)器件，”在 15 日光電子和通信會(huì)議（ OECC 2010）（ IEEE 2010），紙 8E1-1 的訴訟。 19 SH 云， C. Boudoux， GJ Tearney，鮑馬，的“掠高速波長(zhǎng)的半導(dǎo)體激光與一個(gè) polygonscanner basedwavelength 過(guò)濾器，”選項(xiàng)。快報(bào)。 28， 1981-1983（ 2003）。 20 ， H. K.加藤， R. N.藤原吉村，石井， F.卡諾， Y.川口， Y.近藤， K. Ohbayashi，并 H. Oohashi，“ 140 nm 的準(zhǔn)連續(xù)快速掃描使用 SSG-DBR 激光器，“ IEEE 光子。技術(shù)快報(bào)。 20， 1015-1017（ 2008）。 12 原文 2 THEORY FOR PLATES OF MEDIUM THICKNESS (K TEORII PLASTIN SREDNEI TOLSACHINY) A theory of elastic isotropic plates of constant thickness is constructed without assumptions about the nature of the deformations of the transverse linear elements. The stresses xx, xy, yy are expanded in a series of Legendre polynomials Pk (2z/h). The remaining stresses are found from equilibrium equations after application of Castiglianos principle. The expansion of unknown quantities in Legendre polynomials was applied to the shell theory by Cicala I. But he made use of the principle of virtual displacements, which does not reveal all the advantages of these series over power series. Application of the Castigliano principle gives the possibility of using these advantages effectively with the result that expansion in Legendre polynomials permits a separation of those parts of the stress for which the principal vector and moment is equal to zero. Because of this circumstance the boundary condition is formulated in the most convenient form for application of the St. Venant principle. By neglect of terms of the order of (h/a)* by comparison with unity (h, plate thickness, a, plate width) one may obtain the equations of classical plate theory from those of the present theory. Conservation of these terms leads to exact equations which contain other terms besides those in 2-41. 1. The middle surface of the plate is described by a Cartesian rectangular xyz coordinate system. Besides the xyz coordinates we introduce the nondimensional coordinates The stresses xx, xy, yy in the plate are represented in the form of Legendre polynomials in the coordinate Here and from now on the symbol (xy) signifies that analogous relations for other quantities are obtained by the interchange of x and y. 13 By virtue of the orthogonality of the Legendre polynomials, Txx, . . . .Myy have the significance of forces and moments, and Pk() kxx . . . . self-equilibrating stresses through the plate thickness. For simplicity we consider the surfaces z = h/z of the plate to be loaded by only continuously distributed normal loads Substitution of the Expressions (1.1) into the equilibrium equations of the theory of elasticity and integration with respect to z using (1.2) gives expressions for the remaining stress components (mass forces omitted) and the equilibrium equations for forces and moments The quantities Vx and Vy represent shear forces and Akx, Aky determine self-equilibrating shear forces through the thickness. It follows that Expressions (1.1) and (1.3) satisfy the equilibrium equations of the theory of elasticity and the boundary conditions (1.2), if forces and moments are introduced therein satisfying the equilibrium equations (1.4) of plate theory. For determination of the quantities Txx， Mxx ， kxx. we make use of the Castigliano principle； the problem leads to an extremum condition since the forces and moments must be subject to Equations 14 (1.4). As usual, we use the method of Lagrangean undetermined multipliers. We insert the left-hand sides of Equations (1.4) inside the integral for potential energy of the plate, multiplying each by an undetermined multiplier. As a result we obtain the functional Here u, v, , x ,y are Lagrangean multipliers. The double integral is taken in the middle surface of the plate. Formulas (1.1) and (1.3) for stresses are inserted into (1.6) and the variation of the functional is equated to zero. The variational equation will result in relations which must be satisfied in the middle surface of the plate. If only the first four terms are retained in the series (1.1) ( kxx = kxy = kyy = 0, k 4), these equations take the following form 15 In addition, on the contour of the region must hold. The quantities under the integral sign are components corresponding to vectors and tensors, referred to the external normal n and the tangent s of the contour. Quantities in the square brackets will 16 not be used and we shall not discuss them. The static and geometric (homogeneous) boundary conditions follow from Equation (1.12). Note that if only the first two terms in series (1.1) are retained, the plate theory of Reissner 4 is obtained. If, in addition, the stresses xx, xy, yy are neglected in the functional (1.6 ) the plate theory of Kirchoff is obtained. By consideration of the obtained equations it is easy to find that the problem of stress determination splits into two independent problems. The first problem consists in solving equations of the type of (1.7), (1.8) and the first of (1.4) with corresponding boundary conditions from (1.12), The second problem consists in solving equations of the type of (1.9), (l.l0), (l .l l), and the second equation of (1.4) with the corresponding boundary conditions. In the future we shall limit ourselves to the case where only the first four terms are retained in the series (1.1)； (b = 2, 3). From the obtained system of equations one may derive another system for the determination of the self-equilibrating stresses, kxx, kxy, kyy through the thickness of the plate (excluding forces, moments and displacements appearing as Lagrangean multipliers). The coefficients for the derivatives of different series are small numbers, the smaller the higher ；he order of the derivative. In view of this, a more general solution for such a homogeneous system will be expressed by a rapidly varying function, and a particular solution is easily calculated with sufficient accuracy. It will also be determined during a study of the state of stress in the plate remote from the edge as a rapidly varying .part of the solution by virtue of the St. Venant principle (since knn, kns ,Akn at the edge of the plate determine stresses, self-equilibrating through the thickness) localized at the edge of the plate and decaying rapidly away from it. In this work on stress determination we have limited ourselves to consideration of a particular solution of the above equations not giving the state of stress localized at the edge of the plate. For this, terms of the order of (h/a)2 must be retained n the formulas or the stresses xx, xy, yy and terms of the order of (h/a)4 neglected by comparison with unity. 2. We consider the second problem. The shear forces and moments arising from the action of the surface forces (1.2) have the following orders 17 (assuming that the external loads are such that the order of the quantities considered does not reduce upon differentiation with respect to .). The particular solution of Equation (1.10) with an accuracy to terms of the order of (h/a)2 has the following form: We conclude from these equations, as well as from.(2.1) and (1.5), that the bracketed terms in (1.9) are as small by comparison with the left-hand side of (1.9) as (h/n)4 is by comparison with unity, and these terms must accordingly be rejected in the simplified system. The expressions obtained for moments Coincide with the formulas of Reissner 4 and Armbartsumian 2. These formulas would be obtained if the last term on the right in (1.11) were neglected. Therefore one must take The formulation of the edge problem coincides with the edge problem in the work of Reissner 4, but differs from the edge problem in the work of Ambartsumian 2. Thus, in the work of Reissner the edge condition is equivalent to and in the work of Ambartsumian to 18 Condition (2.5) is obtained by a variational method. The left-hand side has the significance of a generalized displacement, in which work of the moment Mnn is done. The left-hand side of (2.6) has no such significance. Therefore the edge condition (2.6) does not answer the requirement that the reaction of the support do no work, and it must be regarded as inconsistent. The result of this will be a nonselfconjugate edge problem. Thus, the edge problem in the present formulation agrees with the edge condition for plate bending of Reissner. The difference consists in the formulas from which stresses are calculated after finding the forces, moments and displacement w. Thus the stresses xx, xy, yy are determined from the formulas 19 in accordance with (l. l), (2.2) and (2.3). The first terms on the right-hand side give stresses as calculated from the classical theory of plates. The remaining terms give the corrections of the order of (h/a)* compared with unity. If terms P5 () 5xx , P5() 5xy, P5() 5xz, were retained in the series (l . l), then the corrections obtained would be of a still higher order than (h/a)2. In the Reissner plate theory the stresses are A comparison of Formulas (2.8) to (2.10) with those of (2.7) shows that certain terms are missing from the less exact formulas, terms having in general the same order as those already retained. The reason for this is that Reissner starts with a linear distribution of the stresses. xx, xy, yy through the thickness； other authors 2,3 introduced other simpifying assumptions with an unknown error in the determination of stresses and displacements. 3. We return to the problem of the momentless deformation of a plate. We assume that the stresses induced by forces applied at the edge of the plate all have the same order as the bending stresses (i.e. p(a/h)2)； let q p The particular solution of Equation (1.8) with accuracy to terms in (h/a)2 compared with unity will be Considering that Txx， Tyy = ph(a/h)2 and referring to (1.5), we conclude that the bracketed terms in (1.7) are as small in comparison with the left-hand part of (1.7) as (h/al4 is compared with unity, and accordingly those terms must be omitted in the simplified system. We obtain These formulas are also found in 2, 3in which they determine the membrane stresses. In the present work .the stresses are given by the formulas 20 in agreement with (3.1) and (1.1). If the terms P4() 4xx , P4() 4xy, P4() 4yy, are retained in the series (1.11, then the corrections obtained will be of a higher order of smallness than (h/a)2 as compared to unity. BIBLIOGRAPHY 1.Cicala, Placido, Sulla teoria della parete sotile. Giorn. Genio ciuile 97, NOS. 4, 6, 9, 1959. 2.Ambartsumian, S. A. , Teoriia anizotropnykh obo lochek (Theory of Anisotropic She 1 Is). Fizmatgiz. 1961. 3.Mushtari, Kh. M., Teoriia izgiba plit srednei tolshchiny (Theory of bending of plates of medium thickness). IZV. Akad. Nauk SSSR, Mekhanika i Mashinostroenie NO. 2, 1959. 4.R.eissner, E., On the bending of elastic plates. J. Math. and Phys. Vol. 23, 1944. 21 譯文 2 中 厚 板 理 論 波尼亞托夫斯基 一 種沒(méi)有假設(shè) 橫向 線性單元 變形 的性質(zhì)的中等厚度板的理論 。 產(chǎn)生的應(yīng)力xx，xy，yy擴(kuò)展在一系列的 Legendre 多項(xiàng)式 。在運(yùn)用卡式原則的平衡方程中發(fā)現(xiàn)剩余應(yīng)力。 Cicala 將 Legendre 多項(xiàng)式中的的未知量的擴(kuò)展應(yīng)用到板殼理論。但他所使用的原則，虛位移，卻不會(huì)顯示這些系列的所有優(yōu)點(diǎn)。 卡氏原則中的應(yīng)用給出的可能性能有效地使用這些優(yōu)點(diǎn)，其結(jié)果就是 Legendre 多