freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

機(jī)械外文翻譯---材料制備機(jī)械設(shè)計理論中的新趨勢和新問題-機(jī)械設(shè)計(留存版)

2025-03-20 06:14上一頁面

下一頁面
  

【正文】 irection of development in material processing technology and machine are proposed ,such as ,producing new concept materials possessing some specific and extraovdinary properties by means of integrating and coalescing conelative frontier science and technology 。在當(dāng)前世界中日益激烈的競爭和人們追求幸福生活的今天,物質(zhì)的功能已經(jīng)遠(yuǎn)遠(yuǎn)超出了人類現(xiàn)有的并不斷增長的知識及想象。這樣的話,那些特別性能的原料就能被處理加工了。因此新的基礎(chǔ)理論由分析接觸行為和變形裝置獲得(例如:摩擦力、變形相容性條件,等等)。由于這些原因,學(xué)習(xí)基本法律和以上提到的具有這些功能的機(jī)械裝置;例如:強(qiáng)調(diào)分配功能、破壞機(jī)理和在特定領(lǐng)域中的設(shè)計標(biāo)準(zhǔn),靜態(tài)(動態(tài))的硬度和阻尼,模糊設(shè)計和明朗設(shè)計處理系統(tǒng)構(gòu)成了有斜度的材料,等等。當(dāng)然形成一個大結(jié)構(gòu)的元素也是可能的(例如太空船、大陸洲際間的交通工具、汽車、飛機(jī))。 ( 2)有能力在臨界狀態(tài)下工作,因此高穩(wěn)定性和理想性能的處理設(shè)備是在加強(qiáng)技術(shù)條件和室外操作的保證。and under certain circumstances ,the constraints may be destroyed or mismatched instantaneously and thus dynamic instability is resulted in. Thus following problems can be put forward : Mechanism of“ spectre chatter” arose from sticking sliding friction and partial hydrodynamic lubrication in rolling interface , instability condition and mechanism of constraint between smooth surface and rotating body under the circumstance of high speed ,heavy duty and boundary lubrication , Lubrication film absorption mechanism and physical chemistry behaviour of interface of unceasingly regenerative surface ,the relationship between rheological characteristic and machine operation parameters. 3. 3 Multi Body Non Linear Contact Mechanism Under the Condition of Extra High Pressure Field To build the super strength pressure field on large area is one of basic function of material processing machine , and it is also necessary to 5 form by once large size structure element (such as spacecraft , intercontinental vehicles ,car and large scale aeroplane etc) . The ability to build super strong pressure field is one of important feature and the base of independent national defense. Under the circumstance of super strength pressure field ,multi body strong nonhertz contact and non linear friction will be produced ,thus local permanent deformation and degrading of element accuracy may be led. New theory foundation of design of machine with super strength pressure field will be furnished through study of multi body strong non hertz contact mechanism , multi body non linear friction mechanism (such as providing force displacement mixed solving process of three dimension multi body) . 3. 4 Load Distribution Law in Multi Sliding Pair With Structure Bias Load With regard to statically indeterminate structure ,load distribution of constraint point is determined by deformation patibility condition. However ,concerning some plane large size statically indeterminate structure with sliding degree of freedom in third dimension ,load distribution can not be determined by deformation patibility condition. Thus new theory basis will be provided by analyzing of contact behaviour and mechanism of sliding pair (such as creep ,force of friction ,integral deformation patibility condition ,etc) . 3. 5 Coupling Mechanism and Stability of Multi Physical Fields in Material Processing Systems In the wake of system function being more and more diversified , conventional technology limits in material processing machine is being broke through unceasingly ,system structure also bees increasingly plicated ,and system performance bees increasingly multi causal . For example ,any instantaneous state of roller in fast rolling mills is affected by elastic deformation ,plastic flow ,h
點(diǎn)擊復(fù)制文檔內(nèi)容
教學(xué)課件相關(guān)推薦
文庫吧 www.dybbs8.com
備案圖鄂ICP備17016276號-1