【正文】 處理中的應(yīng)用. 江 蘇 大 學(xué) 學(xué) 報( 自 然 科 學(xué) 版) ， 2022 年 1 月第 23 卷第 1 期.[6] 于新奇、彭培英等 . 激光加工多孔密封端面的摩擦性能試驗研究. 潤滑與密封，2022 年 8 月第 8 期 (總第 180 期，)[7] 陸華才 ,符永宏. . 2022 年 12 月第 6 期[8] 符永宏，葉云霞 . 用于顯著改善摩擦 學(xué)報，2022 年 8 月第 38 卷第 8 期.[9] 符永宏，華希俊等 . 摩擦副表面激光微造型工藝試驗研究. 應(yīng)用激光，2022年 10 月第 26 卷第 5 期.[10] 劉建東、伏克松、劉思濤. 影響球墨鑄鐵過冷度因素及控制方法. 寧夏機械，2022 年第 2 期致 謝 在這里我要感謝所有曾經(jīng)寄予我關(guān)心和幫助的人，這篇論文的完成和他們中的任何一位都是分不開的。 首先，我要向我的指導(dǎo)老師姚老師致以由衷的感謝和誠摯的敬意，他的指導(dǎo)為我們提供了設(shè)計的主題思想，在實驗過程中，他在自己的繁忙工作之余指導(dǎo)我們，檢查并排除了我們實際操作過程中的諸多漏洞。無論是設(shè)計，還是工藝，我都有很大的收獲。在論文的編寫過程中，他給我提出寶貴的意見，并且給與細(xì)致的指導(dǎo)。最重要的是指導(dǎo)老師教會我們許多分析、解決問題的方法，這在書本中無法學(xué)到的，他的教誨培養(yǎng)了我科學(xué)的思維方法和一絲不茍的治學(xué)態(tài)度，淵博的學(xué)識更使我受益匪淺。 其次，我要感謝的是我的同學(xué)——張金州同學(xué)，本實驗的設(shè)計由我們共同完成。在整個實驗過程中，我們配合的非常默契，共同克服困難，出謀劃策。正是由于我們的努力，整個實驗才能進(jìn)行的那么順利。同時我要感謝機房的李老師，他每天按時地為我們開機房的門，為我們提供了很好的上機環(huán)境。同時也給與我們很多幫助。 再次，我要感謝大學(xué)四年所有教過我的老師和我們的輔導(dǎo)員，感謝他們四年來對我的教誨和幫助。還要感謝我們 04 機械所有的同學(xué)，正是可愛的你們，我的大學(xué)生活才如此的豐富多彩！最后要感謝的，是我的家人，同時將這篇論文送給他們。感謝他們生活上給我的支持和照顧，在學(xué)習(xí)上給我的關(guān)心和鼓勵，我才能安心，順利的完成大學(xué)學(xué)業(yè)。附錄一 英文科技文獻(xiàn)翻譯英文原文：Experimental investigation of laser surface textured parallel thrust bearingsPerformance enhancements by laser surface texturing (LST) of parallelthrust bearings is experimentally investigated. Testresults are pared with a theoretical model and good correlation is found over the relevant operating conditions. A parison of the performance of unidirectional and bidirectional partialLST bearings with that of a baseline, untextured bearing ispresented showing the bene?ts of LST in terms of increased clearance and reduced friction.KEY WORDS: ?uid ?lm bearings, slider bearings, surface texturing1. IntroductionThe classical theory of hydrodynamic lubrication yields linear (Couette) velocity distribution with zero pressure gradients between smooth parallel surfaces under steadystate sliding. This results in an unstable hydrodynamic ?lm that would collapse under any external force acting normal to the surfaces. However, experience shows that stable lubricating ?lms can develop between parallel sliding surfaces, generallybecause of some mechanism that relaxes one or more of the assumptions of the classical theory.A stable ?uid ?lm with su?cient loadcarrying capacity in parallel sliding surfaces can be obtained, for example, with macro or micro surface structure of di?erent types. These include waviness [1] and protruding microasperities [2–4]. A good literature review on the subject can be found in Ref. [5]. More recently, laser surface texturing (LST) [6–8], as well as inlet roughening by longitudinal or transverse grooves [9] were suggested to provide load capacity in parallel sliding. The inlet roughness concept of Tonder [9] is based on ‘‘e?ective clearance’’ reduction in the slidingdirection and in this respect it is identical to the par tialLST concept described in ref. [10] for generating hydrostatic e?ect in highpressure mechanical seals.Very recently Wang et al. [11] demonstrated experimentally a doubling of the loadcarrying capacity for the surface texture design by reactive ion etching of SiC parallelthrust bearings sliding in water. These simple parallel thrust bearings are usually found in sealless pumps where the pumped ?uid is used as the lubricant for the bearings. Due to the parallel sliding their performance is poorer than more sophisticated tapered or stepped bearings. Brizmer et al. [12] demonstrated the potential of laser surface texturing in the form of regular microdimples for providing loadcarrying capacity with parallelthrust bearings. A model of a textured parallel slider was developed and the e?ect of surface texturing on loadcarrying capacitywas analyzed. The optimum parameters of the dimples were found in order to obtain maximum loadcarrying capacity. A microdimple ‘‘collective e?ect’’ was identi?ed that is capable of generating substantial loadcarrying capacity, approaching that of optimumconventional thrust bearings. The purpose of the present paper is to investigate experimentally the validity of the model described in Ref. [12] by testing practical thrust bearings and paring the performance of LST bearings with that of the theoretical predictions and with the performance of standard nontexturedbearings2. BackgroundA cross section of the basic model that was analyzed in Ref. [12] is shown in figure 1. A slider having a width B is partially textured over a portion Bp =αB of its width. The textured surface consists of multiple dimples with a diameter ，depth and area density Sp. As a result of the hydrodynamic pressure generated by the dimples the sliding surfaces will be separated by a clearance depending on the sliding velocity U, the ?uid viscosity l and the external load It was found in Ref. [12] that an optimum ratio exists for the parameter that provides maximum dimensionless loadcarrying capacity where L isthe bearing length, and this optimum value is hp=. It was further found in Ref. [12] that an optimum value exists for the textured portion a depending onthe bearing aspect ratio L/B. This behavior is shown in ?gure 2 for a bearing with L/B = at various values of the area density Sp. As can be seen in the range of Sp values from to the optimum a value varies from to , respectively. It can also be seen from ?gure 2 that for a no optimum value exists for Sp and the maximum load W increases with increasing Sp. Hence, the largest area density that can be practically obtained with the laser texturing is desired. It is also interesting to note from ?gure 2 the advantage of partialLST (a 1) over the full LST (a = 1) for bearing applications. At Sp= , for example, the load W at a = is about three times higher than its value at a = 1. A full account of this behavior is given in Ref. [12].3. ExperimentalThe tested bearings consist of sintered SiC disks 10 mm thick, having 85 mm outer diameter and 40 mm inner diameter. Each bearing (see ?gure 3) p