針端壓力 的英文怎麼說
中文拼音 [zhēnduānyālì]
針端壓力
英文
needle pressure-
In view of bearing capacity of the elastoplastic theory analysis, the author made a comparison between the achieved bearing capacity limit load pi / 4 of round base ( space problem ) and the limit load pi / 4 of bar groundwork foundation design ( plane problem ) from soil mechanics at home and abroad as well as foundation criterion, and explained why the value of formula in present design criterion from soil mechanics is inclined to be conservative. in the light of the author ' s many years experience of vibration test on the spot and the research work of relevant projects, the author worked over the dynamic pile testing of the bearing capacity of foundation and batholith, and gathered the parameter of dynamic analysis and testing. the author also talked over the difficult point of pile foundation design criteria in present batholith engineering world, i. e. the confirmation of batholith bearing capacity of pile end, from the following aspects : a ) confirmation of single axis counter - pressure strength of rock in house ; b ) f. e. m calculation of elastoplastic model ; c ) calculation of soil mechanics ; d ) deep well load test
然後，對巖土工程領域至今尚未解決，甚至不為人注意的考慮地基變形的地基承載力問題進行了實用化的探討，提出了考慮地基變形的地基承載力上程計算方法；對基於彈塑性理論分析的地基承載力國內尚未見報道的空間問題得到了圓形基礎（空間問題）的承載力界限荷載p _ （ 1 / 4 ） ，並與國內外土力學專著及地基基礎設計規范中的條形基礎（平面問題）的界限荷載p _ （ 1 / 4 ） ，進行了對比，從而定量上解釋了目前設計規范引用土力學承載力公式值偏於保守的這一情況；根據本文作者多年從事現場地基工程振動試驗及相關課題的研究工作，本文以截頭錐模型模擬地基，對地基（巖基）承載力的動測法進行了研究，為各類地基（包括巖基） ，匯總了動力分析和檢測川的參數：針對日前巖土工程界應用樁基設計規范中的難點? ?樁端巖基承載力的確定問題，從巖石室內單軸抗壓強度確定、基於彈塑性模型的有限單元法計算、土力學計算及深斤載荷試驗四方面進行了深入討論；本文作者根據多年現場載荷試驗的工程實踐，對深井荷試驗裝置的核心部分? ?反力裝置，設計了側壁支撐反力加載系統，該加載系統具有實用、簡便、穩定及安個等優點。Based on the demand of power department, a full distributed multifuncitional monitoring device is studied. this instrument not only can measure the data of hydroelectric plant, but also integrate the funcition of control the dynamotor, by cooperate with the program of epigynous system, it can realization the auto generate electricity on the hydroelectric plant and ordinal startup - stop of the dynamotor. 2 furthermore, performance of integrated dft arithmetic enhances the acturacy and reliability of measure. by communication several devices can run online to be controlled dispersedly and managed centrally
本文分析了國內外水電站自動控制裝置的研究和發展狀況，尤其是國內小型水電站的自動化現狀，針對現有電力部門的需求，設計並實現了一種單元式的微機自動監控裝置，該裝置不僅實現了對水電站內各種模擬參數和數字信號的實時監測功能，還對水輪發電機組進行了調控，通過與上位機處理程序的配合，可以實現水電站的自動發電控制、機組順序啟停；在測量發電機組機端電壓和電流參數的時候，採用32點離散傅立葉演算法（ dft ） ，增加了測量的準確性和可靠性；通過通訊可以實現裝置的聯網運行，做到「分散控制、集中管理」 。Then a vsc controller using on - off valve and two potentiometers are designed for cushioning control system. it can realize the balanced, no shock, no reversing cushioning. experiments under different air pressure, load mass are carried out, and the results prove that the vsc controller can be used in pneumatic cushioning
第五章首先介紹了變結構控制的原理和應用發展情況，然後針對本實驗系統設計了一個使用開關閥和端位位移傳感器的變結構控制方案，實現緩沖過程的平穩無沖擊和無回彈要求，並在不同氣源壓力、不同負載質量下分析了控制性能的變化，實驗結果證明緩沖控制採用變結構控制是可行的，並具有很強的魯棒性。In this paper, high heat penetration into a moving particulate bed is described mathematically with a comprehensive heat and mass transfer model. the distribution of gas velocity and pressure, the temperature field of gas and solid in the moving particulate bed are examined for different conditions. the results show that thermal penetration into the moving packed - bed particles by fluid flow in porous media is high only in the position near the gas entrance. the thermal penetration thickness tends to increase with the fluid flow velocity and decrease with the particle moving velocity. in the region of thermal penetration, the porosity of solid bed has significant effect on gas field and pressure loss. it is feasible to reduce the gas pressure loss by a larger width / height packed bed in design and operation. the correspondence between thermal infection depth and particle bed height would be helpful to keep high oapacity of reactor and reduce the cost of operation
針對移動顆粒床中物料層內的高溫氣體滲流傳熱現象，考慮滲流與傳熱的相互作用，採用局部非熱平衡假設建立了多孔介質滲流傳熱物理數學模型並進行了數值計算.研究了不同情況下床內填充多孔介質中的流速、氣固溫度和床層壓力損失.計算結果表明，高溫熱氣對移動床顆粒料層的熱滲透主要發生在滲流入口端區域，增大入口滲流速度以及減小床層物料下移速度將導致物料溫度沿床高慢速下降，熱滲透深度擴大，熱滲透作用區域內的物料溫度水平提高.在熱滲透作用區域，孔隙率對流場和壓力損失有很大的影響.研究結果對于移動顆粒床反應器的設計與運行具有一定的參考作用In order to analysis the contact problem between elasticity roller and rigid plane, another iterative process is raised. supposing the right contact point has been known, the left contact point has to be found and the distribution of stick zone and slip one have to be determined in each iterative process. the outer load is evaluated according to the solved force distribution in contact zone
針對彈性滾柱與剛性平面的穩態滾動接觸問題，採用已知接觸區右端點來搜索接觸區左端點以及區內粘連區、滑移區分佈的迭代搜索方法，並根據搜索得到的接觸區內分佈壓力反求出外部載荷。This paper aims at the request of distribution automation and the disadvantages of existent ttu products and puts forward a scheme of ttu design : dsp ic tms320lf2407a of ti ltd. is chosen as a controller because of its high performance ; a three - phase power / energy ic developed by sames ltd. is used as a measure module to simplify the hardware circuit and software program ; the embedded modem and rs485 / rs232 mode communication interfaces are designed to make the data transfer more flexible and effective ; the 101 communication protocols of international electric power standard are adopted to improve its compatibility
本文針對配電自動化的要求及現有ttu產品的不足，提出了一種基於dsp的配電變壓器遠方終端單元的研製方案：微控制器選用ti公司高性能定點dsp晶元tms320lf2407a ；使用sames公司推出的三相電能計量晶元sa9904a作為測量模塊，簡化了硬體電路和軟體編程；採用siliconlaboratories的嵌入式modem 、 rs485 rs232等多種通信方式，使數據傳送變得靈活、高效；為了提高設備兼容性及通用性，通信協議採用國際電力標準101規約。Abstract : in view of the disadvantages of the commonly used prophylactic repair mode for such power equipments as generators and transformers, the significance of developing state monitoring and fault diagnosis technique is analyzed, and the state ? of ? the ? art and existing problems of the technique are described
摘要：針對發電機、變壓器類電力設備普遍採用的預防性定期檢修方式所存在的弊端，分析了發展狀態監測和故障診斷技術的意義，並對該技術在國內外的發展現狀和存在問題進行了介紹。In recent years, the safety factor method has been used for the design of cfrp wound pressure vessels, which cannot explain the stochasticity and quantify scientifically the uncertain significant factors, has the disadvantages of low ecomony and so on. under these circumstances, the study on reliability of cfrp wound pressure vessels during the winding technology process and inner pressure loading was accomplished in this paper
本研究針對目前cfrp纏繞壓力容器採用安全系數法設計不能解決隨機性問題，對結構功能的重要影響因素沒有科學量化，經濟性低等弊端，進行了cfrp纏繞壓力容器在纏繞工藝過程中和內壓作用下的可靠性研究。The basic principal and general structure of dry gas seal are introduced briefly, and aiming at the characteristics of logarithm spiral curve, the calculation of the pressure to the spiral groove end surface by the theory of narrow groove are given. the method of narrow groove theory and finite element method are utilized to optimize the end surface structure of the spiral groove dry gas seal. the structure of the seal is confirmed on the base of the result
簡要介紹了干氣密封的基本原理和一般結構，同時針對對數螺旋線形的特點，介紹了窄槽理論對螺旋槽端面的壓力分佈計算，利用窄槽理論和有限元方法對螺旋槽干氣密封端面結構進行了優化，並得出了優化結果，根據這一結果，確定了具體的密封結構。By way of these tendons, precest beams and columns can be assembled conveniently, and the joints and frame are monolithic and continuous. consequently, compared with common reinforced concrete frams, this kind of frame systems possess higher reliability and solved the problems in the process of assembling prestressed concrete frames. also it forms the framework of subassemblage and prestressed concrete frames, and explores a new way for industrial production of prestressed structures. by analyzing this system, a series of conclusion are provided, incluing modulation of bending moment produced by vertical loads within beam end, secondary internal forces produced by pretress force, shear resistance of the end of beams, the influence of lateral restrains. theresearch results of this paper are proved to be practical. some advices are also brought forward on the design process
后張預應力筋既可作為施工階段拼裝手段，又可在使用階段承受梁端彎矩，構成整體受力節點和連續受力框架，克服了裝配式節點受力可靠性差的缺陷，解決了預應力混凝土框架難以裝配的問題，形成預制預應力混凝土裝配整體式框架，開辟了預應力結構工業化生產的新途徑。本文針對預壓裝配式預應力混凝土框架，從豎向荷載作用下的梁端彎矩調幅、施加預應力在框架中產生的次內力、梁端抗剪承載力、考慮側限的無側移框架的承載力分析四個方面對該種裝配式結構體系的性能做了詳細的研究。分享友人