Pre-stressed composite space truss is one of the new kind of space structure systems developed on the basis of prestress and space truss, which consists of steel and reinforced concrete. At present the study in this field is just being begun in our country. Therefore, in this paper static and dynamic performances of pre-stressed composite space truss associated with a practical engineering are studied, in addition, dynamic test on construction site and model experiment are done. Finally, we conclude this structure is well in stress and stiffness and dynamic characteristics.

預應力組合網(wǎng)架是一種基于網(wǎng)架和預應力技術(shù)發(fā)展起來的由鋼和鋼筋混凝土組合而成的新型預應力空間結(jié)構(gòu)體系裸体美女黄十八禁免费网站，目前國內(nèi)在此領(lǐng)域的研究和應用都較少黄色视频在线观看你懂的，為此一级a性色生活片厕所偷拍，本文結(jié)合實際工程對預應力組合網(wǎng)架進行了靜力和動力的分析研究97精品视频在线观看免费专区，并作了施工現(xiàn)場的動力測試及模型試驗肏女人逼12p，總結(jié)出預應力組合網(wǎng)架受力比較合理人人操人人亚人人干99，剛度、動力特性好大量国产真实在线视频，是值得推廣的一種空間結(jié)構(gòu)形式麻豆视频免费播放。

The variable geometry truss mechanisms have been studied extensively and systematically by this project. The research plan has been completed all sidedly, and expected results have been obtained. Three new kinds of combination decahedrons and a new class of variable geometry truss mechanism, which is composed of an octahedron and three tetrahedrons connected in parallel form, are proposed. The position analyses for decahedrons, dodecahedrons, triple-octahedrons, combinations decahedron and a new type of structure of variable geometry truss mechanisms are presented by introducing additional extra linear displacement sensors and using resultant elimination and homotopy continuation algorithms. The method of kinematical analysis of variable geometry truss mechanisms is established.

課題組對變幾何桁架機構(gòu)進行了深入的研究，全面地完成了研究計劃亚毛基地，取得了預期的成果无码在线点开看；提出了三種新的十面體組合機構(gòu)以及由一個八面體和三個四面體組成的新型變幾何桁架機構(gòu)的結(jié)構(gòu)形式久久久www黄页免费网站；應用結(jié)式消元、附加傳感器和同倫方法等提出了十面體国产538黄色网站在线观看、十二面體夜间福利av、三重八面體、組合十面體和新型變幾何桁架機構(gòu)的位置分析方法直接观看黄的免费网站；建立了變幾何桁架機構(gòu)運動分析的一般方法久久福利亚洲；建立了簡潔的凱恩和拉格倫日動力學的模型；應用有限元和子結(jié)構(gòu)方法性直播无遮免费观看网站，提出了變幾何柞架機構(gòu)彈性動力學模型精品福利，導出了逆動力學方程的顯式形式；設(shè)計和研制了一臺可折疊的八面體變幾何杵架機構(gòu)裝置等18岁禁看黄色。

The main products are: various kinds of aluminium alloy stage light truss, background truss, layer truss, exhibition truss, movable stage, plexiglass stage, assembled stage, foldable stage, flight case, instrument case, standard case, irregular case and so on. detailed specification can be designed and made by your different requirement.

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In study of the truss structural dynamic characteristics analysis, randomness of the structural physical parameters and geomtric ones are all considered. The finite element model of the stochastic truss is built and the random functions of its natural frequencies are obtained by use of the Rayleigh quotient. Employing probabilistic distribution function expression for the random functions, through a series of mathematical processing including determination of limits of integrals, variable substitution etc., the probaabilistic density function for the truss natural frequencies are gained to realige accurate calculation for the reliability of the truss natural frequencies.

考慮結(jié)構(gòu)物理參數(shù)和幾何參數(shù)的隨機性91se国产在线视频，通過構(gòu)建隨機參數(shù)桁架結(jié)構(gòu)的有限元模型，利用瑞利商公式獲得了結(jié)構(gòu)固有頻率隨機函數(shù)的計算表達式国产欧美亚洲91精品，應用隨機函數(shù)的概率分布函數(shù)表達式农村少妇A级毛片免费看，通過確定積分區(qū)間、變量替換亚洲精品国产2014AV天堂网手机版、積分順序變換等一系列數(shù)學上的處理黄色带三级片视频，獲得結(jié)構(gòu)固有頻率的概率密度函數(shù)，進而實現(xiàn)對結(jié)構(gòu)固有頻率可靠度的精確計算勉费的黄色视频。

Study on the selection of spatial truss roof. After analyzing the types of space truss in common use in gymnasium, make sure the factors in selection of spatial truss and do further research of applicability and economy in this paper.

本文對體育館建筑中常用的空間網(wǎng)架結(jié)構(gòu)形式進行了分析男操女的骚黄视频在线，確定了網(wǎng)架結(jié)構(gòu)在選型時所考慮的多種因素，并對不同類型的網(wǎng)架結(jié)構(gòu)的適用范圍和經(jīng)濟性進行了研究能看啪啪啪的网站。

The role of truss in staggered steel truss system and characteristics of all kinds of truss forms were introduced?

介紹了桁架在鋼結(jié)構(gòu)交錯桁架體系中的作用及各種桁架形式的特點国产一区二区欧美日韩在线观看。

Light wood truss is composed of dimension lumber by metal plate connected joints,the metal plate joint can be a weak part in the truss,so its bearing capacity has a direct relation with the whole truss capacity.

輕型木桁架是輕型木結(jié)構(gòu)中一種常見的結(jié)構(gòu)形式，其節(jié)點一般由齒板釘接而成日本黄色视频高清网站，而該齒板節(jié)點可能是桁架的薄弱環(huán)節(jié)国产大片自拍，其承載力決定著整個桁架的承載能力美女a片久久九，因此齒板連接承載力的確定十分重要。

The first thing that struck me was that there were three screws in the truss rod cover instead of two.

Jonathan說美女自拍理论视频，最早發(fā)現(xiàn)的是Truss Rod檔牌上有三個螺絲而不是兩個来一个黄色一级大片。

The first thing thatstruck me was that there were three screws in the truss rod coverinstead of two.

Jonathan說，最早發(fā)現(xiàn)的是Truss Rod檔牌上有三個螺絲而不是兩個美女视频韩国一区二区。

The effect of joint deformation to truss displacement: 4 kinds of steel tube truss compute models are established making use of shell elements, truss elements, beam elements and combination of beam elements and truss elements.

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