隨機振動臺 的英文怎麼說

中文拼音 [suíjīzhèndòngtái]
隨機振動臺 英文
random shocking table
  • 隨 : Ⅰ動詞1 （跟; 跟隨） follow 2 （順從） comply with; adapt to 3 （任憑; 由著） let （sb do as he li...
  • 機 : machineengine
  • 振 : 動詞1. （搖動; 揮動） shake; flap; wield 2. （奮起） brace up; rise with force and spirit
  • 臺 : 臺名詞（指臺州） short for taizhou （in zhejiang province）
  • 隨機 : random stochasticrandom
  • 振動 : vibrate; vibration; vibrance; vibrancy; vibra; vibes; shaking; rumble; jitter; chatter; sway; jar...
  1. 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。
  2. Then a simplified computational modal of damping isolation systems is established for a platform structure, and the relationships between the parameters of isolation layer and structural damping ratio, including their vibration - suppressed effect on the whole structure and the relative displacement of isolation layer are studied, and the simulation analysis under several representative load case of random wave force and earthquake affairs is performed. under random wave force, using complex mode theories, non - classically damp problems considering the interaction between the structure and wave, lying in deepwater, are studied. and the resolution solution of structural response are achieved. the results of calculating and analysing show that adding damping isolation to a jacket is an effective way to reduce vibration for offshore platforms

    針對某一典型平臺結構，建立了海洋平臺結構阻尼隔振體系簡化計算模型，進行了波浪荷載工況和地震工況的數值模擬，研究了隔振參數與結構阻尼比的關系以及它們對結構整體和隔振層層間相對位移的控制效果，運用復模態理論研究了位於較深水位的固定式導管架海洋平臺在隨機波浪力作用下考慮結構與波浪相互作用時運動方程中非經典阻尼的解耦問題，獲得了結構響應的解析解。
  3. 2. when the test is going along, the connection between the output of the test system and computer is broke off while the state of the test system is changing, so it is difficult to ensure the same precision of stochastic waveform reappearance of the test system output

    進入試驗運行后，計算機輸出的控制信號與振動設備響應之間的關系便成了開環，由於試驗臺或被試對象的狀態在試驗過程中會發生變化，所以難以保證被控系統按同樣的精度再現給定的隨機物理量。
  4. Based on the difference of maximum modulus evolution between signals and random noises in multi - scale space of wt, the signals from shaking table test are processed for random noise reduction

    摘要本文利用小波變換下有效信號有隨機噪聲在多尺度空間中模極大值不同的傳播特性，對地震模擬振動臺試驗測試信號進行去噪處理，取得良好效果。
  5. Experimental modal analysis based on ambient vibration is mainly to deal with the engineering problems from with we can hardly achieve the input signals, such as the operational modes of a flight vehicle during the flight or the dynamic behavior of a large - scale structure like an offshore platform, a bridge as well as a skyscraper on which we can ’ t exert a heavy kick

    基於環境振動的實驗模態分析主要針對一些激勵不可測的工程問題，如研究飛行器在飛行中的運行模態，或諸如海洋平臺、橋梁、摩天大樓之類難以施加激勵的大型結構的動態特性。本文重點研究了隨機子空間方法在環境振動模態分析領域的應用。
  6. After analyzing the traditional methods of generating exciting signals in vibration control system of electrodynamic ( electrohydraulic ) shaker, a new method of adjusting the skewness and kurtosis of exciting signals by second phase modulation is proposed. based on this method, a new algorithm for generating super - gaussian and quasi - random vibration exciting signals with specified psd, skewness and kurtosis is proposed. simulation and experimental results validate the algorithm

    2 .通過分析目前電動（液）振動臺數字式隨機振動控制系統中廣泛採用的激勵信號生成原理，在其基礎上提出了一種通過二次相位調制來控制激勵信號峭度值和偏斜度值的方法，分別得到了頻譜可控的對稱和非對稱分佈超高斯偽隨機激勵信號生成演算法，並進行了數值模擬和試驗驗證，為研究頻譜可控的超高斯真隨機激勵信號生成技術奠定了基礎。
  7. The purpose of this thesis is to investigate the control effect of a semi - active vibration absorber developed for an offshore platform and a vibration control system is also designed. the vibration of the structure is suppressed by installing the new and innovative variable stiffness tuned mass damper ( vstmd ) on the top deck of the platform

    計算表明，本控制裝置對由隨機波浪載荷引起的平臺振動有一定的控制效果，對平臺甲板加速度響應的控制效果最高可達29 ，其平均效果也在21以上，甲板的位移響應也能得到一定的抑制。
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