自振 的英文怎麼說
中文拼音 [zìzhèn]
自振
英文
automotive oscillation-
Analysis of free vibration characteristics of stringed beam structure
張弦梁結構的自振特性分析Development and property test of gzz - 1 free vibration column test system
1型自振柱試驗機研製與性能試驗Free vibration column test
室內土工試驗自振柱試驗Natural frequency of foundation
動力機器基礎基礎自振頻率Abstract : a conclusion has been proved indelail that only if the na tural frequency k of a symmetric structure is nota duplicate root, the vibra tion mode of the strusture must be symmetrical orantisymmetrical. this conclusio n is advantageous to simplify the structural dynamicanalysis and pratically usef ul
文摘:給出了有關對稱結構體系的動力特性的一個結論：對稱的結構振動體系，對應于任一非重根的自振頻率，其主振型必定是對稱的或反對稱的.並給出了詳細的證明.應用這個結論，有利於對稱結構動力分析的簡化，具有實用價值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。Some conclusions are drawn : 1 ) effect of inertial force from superstructures on the lateral seismic response of single pile can not be ignored ; 2 ) the lateral seismic response of single pile induced by far - field earthquake are mainly affected by acceleration mass of superstructure > site eigenperiod. it increases with the increment of accele ration and mass of superstructure. as the site characteristic frequency approaches the self - oscillation frequency of the pile, sympathetic vibration occurs and the value of lateral seismic response reaches maximum ; 3 ) as the stiffness ratio of pile to soil increase, the relative displacement of pile to soil increases ; 4 ) the lateral seismic response of fixed - head pile is much smaller than that of free - head pile
將其解析解與具體的的抗震設防烈度和場地特徵周期結合起來，計算分析了成層地基中單樁的橫向地震響應，得到了以下結論： 1 ）上部結構慣性力對樁的橫向地震響應的影響不可忽略； 2 ）成層地基中的單樁的橫向地震響應主要受地震基本加速度、場地特徵周期、上部結構質量的影響，隨地震基本加速度、上部結構質量的增大而增大；場地特徵頻率越接近樁基自振頻率，樁基地震響應越大，等於自振頻率時，由於發生共振現象，樁基響應幅值最大； 3 ）樁土剛度比越大，樁土之間的相對位移的幅值越大； 4 ）樁頂固接的連接方式，可以有效地降低地震時單樁的橫向地震響應。According to theory of bent structure, the paper applies the moment balance and potential energy theory, and works out the modified modulus 1 and 2 for the depth of burying foundation and toft transmutation, which effect buildings dynamic period
根據排架結構分析理論，應用力矩平衡及勢能原理分別推導出地基變形及基礎埋深對結構自振周期的修正系數_ 1和_ 2 。The essay combines " code for seismic design of buildings " ( gb50011 - 2001 ), analyzing and discussing bent structure of one - story industry buildings tinder the interaction of the seismic, ground - structure, and works out calculation model for bent structure ' s dynamic period about the depth of burying foundation and toft transmutation ; the model is employed expediently, adapts to actual engineer construction design at present
本文結合我國《建築抗震設計規范》 （ gb50011 - 2001 ） ，對單層工業廠房排架結構在地震作用下土?結構共同作用問題進行了分析討論，給出了考慮基礎埋深與地基變形影響時排架結構自振周期的計算模型；這?模型應用方便，適合目前實際工程結構設計使用。Using large - scale current finite element software algor, the author builds 3d finite element models for the five project, and analyzes flexural, temperature deform and natural frequencies of the five guideway girder projects
運用大型通用有限元分析軟體algor ，對五種可能軌道梁結構方案建立有限元空間分析模型，進行撓度、溫度變形及自振特性的對比分析。In order to ascertain the character of cable - replaced bridge, in addition, the thesis calculates mode shapes and natural frequencies of the bridge using algor software and estimates the result of dynamic load test and calculation in details
為了評價換索后橋梁的工作特性，最後利用algor軟體對換索后的結構進行了振型和自振頻率分析，並對動載試驗檢測和計算成果作了詳盡的分析和評價。Aim to eliminate the influences of backlash nonlinear characteristics, a second generation adaptive pid controller based on single neuron is given. the result of simulation and the debug of actual digital servo system shows that the controller can effectively get rid of the sustained oscillation of the system caused by the backlash characteristics, and can improve the system accuracy
隨后，採用改進型單神經元自適應pid控制器來消除間隙非線性對系統的影響，模擬結果表明所採用的方法能有效消除間隙特性引起的系統自振蕩，並且能夠提高系統的跟蹤精度。Then, the author provided ways to control flexible support systems " displacement on the base of study the capability of flexible support systems. at the same time, the author analyzed the self - vibrating capability of flexible support systems and study the influence of parameters " changement
同時，對柔性支承體系的動力性能進行了開拓性的研究，分析了空間柔性支承體系的自振特性，以及矢高、桿件截面、質量等不同參數對其動力特性的影響。By calculating large quantity of examples, this text studies earthquake resistant behavior of tapered portal frame with pined bases and analyzes its natural frequency, natural period of vibration and vibration mode. by comparing interior forces of pillar top, beam end and span midpoint in two conditions that seismic action effect participates combination of forces and not when portal frame is n ' t changed, ensure conditions that combination of seismic action effect has controlling f unction during tapered portal frame design, and tapered portal frame demands anti - earthquake design
本文通過大量算例分析，研究柱腳鉸接楔形變截面門式剛架的抗震性能，並對其自振頻率、振型進行了分析；通過比較地震作用效應參與荷載組合與不參與荷載組合兩種情況下，樑柱截面尺寸不變時，柱上端、梁端、跨中截面處的內力大小，確定在什麼情況下地震作用效應組合起控製作用，變截面門式剛架需要進行抗震設計。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 vibration of upper structure of bridge which caused by the dynamic action of vehicle pass the railway bridge may make the structural component fatigue and decrease the intensity and stability. the more vibration of bridge will influence the safety and stability of vehicles ; when the dynamic changing frequency of vehicle equal or approach to the free vibrational frequency of bridge, wh ich will make the resonance may intensify the response of bridge and vehicles
列車動力作用引起橋樑上部結構的振動可能使結構構件產生疲勞，降低其強度和穩定性；橋梁振動過大可能會對橋上車輛的運行安全和穩定性產生影響；當列車的動力變化頻率與橋跨結構自振頻率相等或接近時，引起的共振可能會使車橋動力響應加劇。Initial vector and iteration control in the matriy iteration method
矩陣迭代法求結構自振特性的初始向量及循環控制In the modal analysis, the similarity laws has been introduced to reduce the error during the assessment of the prototype building ' s natural frequency under the insufficient balance weight testing. by the author ' s theory, the prototype natural frequency can be the same even the balance weight of model is changeable
在模態分析方面，本文利用相似性原理，解決了模態試驗在配重不足時，求解原型結構自振頻率誤差過大的問題，並且得出了在不同配重條件下，試驗模型與原型結構的頻率可以達到一致的相似準數。Cladded roof, which portrays a seabird soaring into flight - a symbol of
，造型構施來自振翅高飛的海鳥，象徵香港飛躍新紀元，A massive aluminium roof captures the rhythm and delicacy of a seabird s wing
會展中心宏偉的鋁質天花，造型構思來自振翅高飛的海鳥。分享友人