natural modes 中文意思是什麼
natural modes
解釋
自然模-
Based on extensive investigation of construction technique history of chinese ancient buildings, the structure method, structure developing history and seismic behavior of chinese ancient timber structure buildings are analyzed in several respects of the structural system and form. through a series of experiments on constituent parts of chinese ancient timber building structure, including the tests on the corbels and brackets called dougong subjected to low cyclic reversed loadings, the tests on the wooden frame using the tenon - mortise joints as connections of column and beam subjected to low cyclic reversed loadings, the tests on vibration isolation effect of friction and slippage between column footing and their socle base, and a series of shaking table tests on a chinese ancient timber structure palace building mode under artificial earthquake at serving conditions, destroyed conditions and reinforced conditions, many valuable results of structures such as moment - curvature hysteretic loops of dougong structure and tenon - mortise joints under low cyckc reversed loadings, the static function, the seismic performance, energy dissipation, vibration reduction, energy - loss mechanism, nechanicalmode and failure mode were studied. aplenty of valuable parameters of the structure system were obtained, such as the natural period of structure, vibration modes, damping ratio, factor of vibration isolation, oscillate amplitude of ineitial accebration, velocity and displacement, magnitude of slippage, and the mechanism of structure failure and collapse etc. based on these research, the complete analysis of ancient timber structure under earthquake were carried out in which including mechanism analysis method, calculating mode, strength analysis of members and joints, strengthening methods for serving damaged ancient timber structure buildings were also taken into account
依照宋代《營造法式》建造了抬梁式殿堂木結構構件及結構模型，對中國古代木結構中的典型構造如：柱腳在礎石頂面平擱簡支、柱架榫卯連接、柱高不越間之廣、側腳、生起、斗拱等的構造機理及結構功能進行了量化分析和實驗研究： （一）通過木柱石礎靜摩擦試驗，測定了柱腳與石礎古鏡面間的摩擦系數及摩擦力隨上部結構荷載變化的規律； （二）通過單柱承載力試驗，測定了古建築中木柱的受力變形特徵、破壞模式、及模型材料的變形模量、極限承載力、極限變形等參量； （三）通過柱架低周反復荷載試驗，測定了柱架的抗側移剛度、柱架恢復力特性及滯回曲線、榫卯張角剛度及其變化規律、柱架及榫卯的極限承載力和極限變形、及榫卯減振參數； （四）通過斗?低周反復荷載試驗和受壓試驗，測定了古建築木構件與木構件間摩擦系數，斗?抗側移剛度，斗?恢復力特性及滯回曲線，斗?抗壓極限承載力及受力變形規律； （五）通過抬梁式殿堂間架模型振動臺試驗，測定了殿堂木構架結構自振周期，地震反應振形、阻尼特性及阻尼比；按結構分層特點對柱腳、柱頭和斗?層上的屋蓋的地震反應採用多點同步測量，對柱根滑移、榫卯變形、斗?的變形、復位、耗能減振參數等進行了定量分析。 -
According to the question of using natural cooling will prolong the period of opening cylinder for overhaul, we expound three modes for the steam turbine quickly cooled after being stopped, these are vacuum and aeration - cooling, pressure - air cooling and steam 1ing, then analysis and contrast them
摘要針對汽輪機採用自然冷卻方式會延長機組檢修開缸時間的問題，提出了汽輪機停機后的三種快速冷卻方式：抽真空通汽冷卻法、壓縮空氣強迫冷卻法和蒸汽冷卻法，並對這三種方式進行了比較和分析。 -
After the users input control tasks in three modes : natural language, electric sheet or flow char, the computer will receive the information of control demands by data mining and knowledge discovery. and then illation is leaded to select the hardware and program the software in the inner of the computer. afterward, control program is transformed in the file format of exiting simulation software by using the simulation interface and is opened in the simulation software
用戶只需在pc機上以自然語言或繪制控制流程圖、填寫表格的方式輸入控制任務，然後在系統內部經過數據挖掘和知識發現分析得到可用控制要求信息，並自動引導推理求解過程進行硬體選型和生成相應的控製程序，最後利用模擬介面，自動將控製程序轉化為現有的控制模擬軟體的文件格式，並在控制模擬軟體中，從而用戶可以對生成的控制系統進行模擬，檢查設計的正確性。 -
In the former, two computing modes of fem are built, aimed at the coupling of variable - profile pylon, curved - axis arch and flexible cable. the software algor feas is used to get the results of dynamic numerical analysis, such as natural vibration frequency, vibration mode, dynamic displacement, dynamic stress, which are compared with the results of shaking table test research to draw to important conclusions. these conclusions provide not only potent basis for the design and construction of nanjing century tower, but also reference for other pylon - cable - arch structures similar to the project
在動態數值分析中，針對世紀塔變截面的塔身，曲線軸線的拱以及柔性拉索相互耦合時清況，建立兩種有限元計算模式，利用有限元軟體algorfeas得到動力數值分析的結果，如：自振頻率、振型、動位移、動應力等等，再和振動臺試驗研究成果作比較，得到一些重要的結論，從而為南京世紀塔工程的設計和施工提供強有力的依據，而且為類以於世紀塔工程的其它塔-索-拱結構的設計也提供一定的參考。 -
The natural periods of formal six modes were advanced researched, the floor panel is assumed to be elastic, contrast with the results, first time it ' s found that the third natural period has a small affection considering sshsti. when the axial loads on piles are considered, the other periods in the formal six modes have relative percent variation from 30 % to 60 %, and the relative percent changes small considering different ground
對比分析發現，體系前六階振型中，考慮樓板彈性假定的地基基礎與結構共同作用對第三振型固有周期基本不存在影響，當地基中的群樁考慮軸力時，其它固有周期增大在30 %至60 %之間，且不同地基之間的差異變化較小。 -
By analyzing the rainfall use efficiency, the soil moisture variation during the whole growth period, the economic characters and the output of dry land corn under different film mulch modes, it has been proved that the mode of whole covering on double ridges and planting in catchment furrows is an effective way to store and utilize fully the natural rainfall, to improve soil moisture conservation, to raise rainfall use efficiency, to advance maturity time, and to increase yield and economic benefits of dry - land corn remarkably
摘要通過對旱作玉米幾種不同覆膜栽培模式降水利用率、玉米整個生育期的土壤水分監測、生育時期觀測、經濟性狀及產量分析證明，旱作玉米雙壟面全膜覆蓋集雨溝播技術是一項充分接納和利用天然降水、最大限度保蓄土壤水分、顯著提高降水利用率、提早成熟、增產效果明顯、經濟效益顯著的旱作玉米栽培模式。 -
Meanwhile, the dissertation has also presented practical plans and statements on the principles of efficiency first with the consideration of fairness, modes for the combination of substantial encouragement and spiritual encouragement to effectively encourage operating managers of enterprises, setting up supervision and controlling mechanism for enterprise m anagers with the principle of interior supervision first and the mechanism for enterprise manager cultivation based on the natural regulations for the growth of enterprise managers
同時對如何按照效率優先兼顧公平的原則、採取物質獎勵與精神鼓勵相結合的方式，有效的激勵企業經營者並建立以內部監督為主、外部監督為輔的企業經營者監督約束機制以及符合企業經營者成長規律的培養機制也作出了符合實際的規劃與論述。 -
One self - anchored suspension bridge is the subject investigated, the finite element program " midas " is adopted to establish the spatial computation model of the suspension bridge, and the subspace iteration method is used to calculate the natural vibration frequencies and modes of the bridge, the bridge ' s dynamic property and rigidity feature are discussed with the computed results
摘要以某自錨式懸索橋主橋為研究對象，採用midas有限元程序，建立了該橋的空間力學計算模型，利用子空間迭代法計算了該橋梁結構的自振頻率和振型，結合計算結果對橋梁的動力特性和剛度特點進行了討論。 -
Taking zibo - qingdao natural gas pipeline engineering for example, starting with the present crossing river modes for gas transport pipeline, the main contents and methods of geotechnical engineering investigation for pipeline crossing river are put forward ; the existential geotechnical engineering problems and relevant countermeasures in the course of design and construction of this pipeline engineering ' s crossing river project are analyzed and evaluated ; the importance of geotechnical engineering investigation in the design and construction of long distance pipe lines is pointed out
摘要以淄青天然氣管道工程為例，從目前輸氣管道河流穿跨越方式入手，提出了管道穿越河流巖土工程勘察的主要內容和方法，分析評價了淄博青島輸氣管道工程河流穿越工程設計及施工過程中存在的巖土工程問題及相應的對策，指明了巖土工程勘察在長輸管道設計及施工中的重要性。 -
After probable damage location through msecr, the method based on the sensitivity of orthogonality conditions gives good predictions of damage. this method overcomes the natural defect of the concept first order approximation of the ordinary sensitivity analysis method. but this method needs complete measured modes
為克服靈敏度分析法一階近似的本質缺陷，基於正交條件靈敏度分析法，利用msecr對結構的損傷進行粗略定位后，給出了準確的識別結果，但這種方法的缺點是需要完備的實測振型。 -
As to the polyreference implemention of the least - squares complex frequency - domain estimator in mathematical separation technique of modes, this thesis builds a right matrix - fraction description model to estimate the system poles. then frequency point stabilization diagram is set up and analyzed to automatically determine natural frequencies, modal damping ratios and modal participation factors. finally mode shapes are identified based on the least squares theory
對于模態數學分離技術的多參考點最小二乘復頻域識別技術，先建立右矩陣分式頻響模型，識別出系統極點，再通過建立和分析頻率點穩態圖，能自動的確定出結構的固有頻率、模態阻尼比和模態參與因子，最後根據最小二乘原理識別出模態振型向量。 -
Secondly, been generalized the failure data of electrical connectors from working and testing environment, electric contact failure, insulation failure, mechanical connection failure and other failure are four mainly failure modes of connectors, moreover, built the faulty - tree to analyze their reliability level. however, contact fault failure was the most prevalent mode of electrical connectors. under natural working and reserving conditions, the contact stress decreasing, fretting and surface film growing are mainly reasons to make electrical connector failure
其次，通過對現場、試驗場電連接器的失效情況進行統計和分析，總結出電連接器的四種主要失效模式：電接觸失效、絕緣失效、機械連接失效和其他失效，並對電連接器進行了故障樹分析，指出電接觸失效是電連接器失效的主要形式，而在正常的工作條件下，造成電接觸失效，即決定電連接器工作壽命的主要原因是氧化膜層的生長、接觸對磨損以及磨損腐蝕物的堆積，而影響氧化膜層的生長、接觸對磨損以及磨損腐蝕物堆積的主要因素是環境振動和溫度應力，為電連接器進行失效機理分析奠定了基礎。 -
The contributions to dynamic responses from the modes with low natural frequency are also discussed. the new expression of the mode - acceleration solution is employed to improve evaluations of the wind - induced response for large roof structures in this paper. in this method, the contributions of those high order models were compensated, and the question of choosing proper modes is avoided
本論文從模態加速度法的理論出發，把因為採用模態位移法而捨去的高階模態對響應的貢獻，通過剩餘柔度陣的方法進行補償，從而避免了繁瑣的高階模態分析過程和如何選擇的問題。 -
The results of this work are valid for under - damping modes provided that the sampling rate is sufficiently higher than the natural frequencies of interest
本文提出的理論解在假設取樣頻率高於自然頻率數倍以上時可適用於所有次阻尼的模組，因此較過去的研究結果更為完整。 -
A finite elements model of rail is built in this paper. after model analysis in ansys, natural frequencies and modes is get
本文用有限元法建立鋼軌模型，進行模態分析，得到鋼軌模型的固有頻率和模態振型。 -
Thirdly, subspace iterative method is adopted in the paper, and natural periods and modes of preceding fifteen steps of zhongshan no. one bridge are solved, dynamic characteristics of this kind of structural system are obtained, inherent link between dynamic characteristics and structural rigidity is discussed deep, the viewpoint is provided that dynamic characteristics of a structure are considered as important basis whether structural scheme is rational ; in addition, the author brings out some own views and opinions about calculational methods of prestress value of different sorts of tie rods, simulation of local rigidity region, foundation of a local finite element model of a node
另外，提出在施工階段中某些構件的應力有可能比成橋狀態的應力還大，需防止在施工狀態中構件因強度不足而破壞；再次，採用于空間迭代法，求解了拱式組合體系橋梁的自振周期和振型，得出該種結構體系的動力特性，深入探討了動力特性和結構剛度之間的內在聯系，提出了把結構的動力特性作為判斷結構方案是否合理的重要依據。此外，本文還就系桿預應力值的確定方法、局部剛度區域的模擬、節點局部有限元分析提出了作者的見解和看法，對解決類似問題得出了一些有參考意義的結論。 -
The modal analysis of the model is done by using the software - ansys. the first ten natural frequencies and vibration modes of swing movable teeth reducer are obtained. the transmission efficiency experiment table of swing movable teeth reducer is designed
把該有限元分析模型輸入到大型有限元分析軟體ansys中，選用合適的計算、處理方法對摘要其進行了模態分析，得到了該減速器的前十階固有頻率和振型。 -
In the context of quantized electromagnetic fields, it seems natural to also investigate the spatial properties of the field if the harmonic oscillators associated with the normal modes of the system are prepared in squeezed states. in 1975, two japanese scientists claims the thermal field dynamics theory, which can make a thermal mechanics statistical state equal to a pure state
將熱力學統計狀態中等效成一個純態來研究，是1975年日本的兩位科學家takahashi和umezawa在他們的熱場動力學理論（ thermalfielddynamicstheory ）中所提出的。 -
We hae found that the existing data are limited with respect to the identification of specific modes of transmission in the natural setting
我們發現，現有的關于自然界中存在的傳播所特有的模式的文獻是有限的。 -
A static / dynamic characteristic test was done to obtain all dynamic parameters of the lathe, then the software ansys for fea was used to simulate and display various vibration modes and natural frequencies with the guide joint parameters taken into account
首先利用靜、動態特性實驗得出機床的各項動態參數，然後用ansys有限元分析軟體模擬和顯示機床在考慮導軌結合面參數條件下的各階模態下的振型和固有頻率。
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