Based on the multi-body dynamic theory,the generalized coordinates that include the jib rotating,the jib elastic deformation and the payload pendulum are used to form the crane multi-body dynamic model.

基于柔性多體動力學(xué)理論在线永久免费黄色网站，選取包含吊臂轉(zhuǎn)動，吊重擺動及吊臂彈性變形的廣義坐標(biāo)，構(gòu)建了起重機(jī)的多體動力學(xué)模型。

If that more than two tower crane are working, as the working specialty, notice the position of them, adopt the different level, so as to avoid the collision from jib of the tower crane, counter-jib and the building.

8.3.7 有兩臺以上塔機(jī)工作時日韩精品影视系列在线播放视频，要根據(jù)工作特點，注意相互之間的位置國產黃片，并采用不同標(biāo)高的方法www.黄色网站.com，以避免塔機(jī)的起重臂，平衡臂相互碰撞亚洲精品国产精品永久福利，以及與建筑物碰撞国产黄色片欧美黄色片。

In a word,virtual prototype study of double link jib system of portal crane is a trial that apply advanced design analysis, emulation techniques in design of portal crane and offers efficient tool and method to design portal crane that is economic, credible stable and high performance.

總之，門座起重機(jī)組合臂架系統(tǒng)的虛擬樣機(jī)研究欧美性XXXXX极品视频，是先進(jìn)的設(shè)計疯狂伦交成人网站视频在线观看、分析、仿真技術(shù)應(yīng)用于門座起重機(jī)設(shè)計中的初步嘗試国产免费丝袜激情视频，為起重機(jī)虛擬設(shè)計官方免费av网站、動態(tài)設(shè)計和結(jié)構(gòu)分仿真分析提供了有力的工具和實現(xiàn)方法。

To simplify the finite element analysis process of tower crane jib, the parameters modeling created by the rapid input to the key parameters to complete the tower crane jib analysis and calculation.

目的 利用參數(shù)化設(shè)計系統(tǒng)簡化塔式起重機(jī)臂架有限元分析過程嗯啊视频在线播放网页，創(chuàng)建參數(shù)化模型亚洲一区性爱视频，通過對關(guān)鍵參數(shù)的輸入快速完成塔機(jī)臂架的分析計算午夜福利影院网址。

Point to take MQ2535 portal crane jib system as to research object, take finite element and mechanical kinetics as to theoretical fundamental, make use of ansys8.1 to emulate jib systemic at the course of luffing in dynamics , obtain luffing procedural dynamics data of rigid body and elastic body of the jib system , according to those data,which is to improve these system designs beneficial conclusion henceforth.

針對以上問題直接观看的黄色网址，本文以MQ2535門座起重機(jī)臂架系統(tǒng)為研究對象，以有限元和機(jī)械動力學(xué)為理論基礎(chǔ)你懂的精美视频，借助ANSYS8.1對臂架系統(tǒng)的變幅過程進(jìn)行了動力學(xué)仿真午夜理论片最新午夜理论剧，得到了臂架系統(tǒng)剛體和彈性體變幅過程的動力學(xué)數(shù)據(jù)，從數(shù)據(jù)中得到了對今后改善該系統(tǒng)設(shè)計的有益結(jié)論性交网在线。

The jib system of portal crane is considered to be elastomer in this paper. Besides, taking finite element as basic theory and mechanical dynamics as analysis method,the paper simulates the virtual luffing process of jib system and seeking the relationship between plane movement and dynamic pressure condition of jib system using ANSYS8.1. By analyzing ,the paper gives some advice on structure optimizing.

針對以上問題韩国黄色视频免费看，本文以MQ2535門座起重機(jī)臂架系統(tǒng)為研究對象，將門座起重機(jī)整個臂架系統(tǒng)視為彈性體国产黄片一区二区三区无码未满十八岁，以機(jī)械動力學(xué)和有限元為理論基礎(chǔ)和分析手段一级特黄生活视频一区二区，運用有限元軟件ANSYS8.1模擬臂架系統(tǒng)的實際變幅過程，探尋物品在變幅過程中水平移動與臂架系統(tǒng)結(jié)構(gòu)動態(tài)受力之間的關(guān)系亚洲日产欧欧美性饭；通過分析其受力情況操一操日一日干一干，對其結(jié)構(gòu)的優(yōu)化提出了一些建議。

This article mainly includes: taking lowest weight as optimization goal, criterionrequest as restrict, optimization programme on jib arm structure of giant floatingcrane design is written based on genetic algorithm;according to jib arm structure ofgiant floating crane which is being designed and other former ones, size and structureform of jib arm are deeply discussed, furthermore, relatively reasonable jib armstructure scheme is proposed.

課題主要內(nèi)容：以結(jié)構(gòu)重量最輕為優(yōu)化目標(biāo)嫖妓精品老司机在线观看、以規(guī)范要求為約束條件成人午夜在线观看影院免费播放视频、使用遺傳算法編制了起重機(jī)臂架優(yōu)化設(shè)計計算程序，根據(jù)目前正在設(shè)計建造的和國內(nèi)已有的起重臂架結(jié)構(gòu)影音先锋亚洲综合资源在线观看，在對拔桿式臂架的尺寸及結(jié)構(gòu)形式進(jìn)行了充分討論研究的基礎(chǔ)上91国内自拍第九页，提出相對合理的臂架結(jié)構(gòu)設(shè)計方案和設(shè)計思路。

According to records, the first tower crane used in construction-related patents issued in 1900. Emerged in 1905 with fixed jib tower crane, made in 1923 the modern prototype of the tower crane, the same year the first complete modern tower crane. At that time, Germany in 1930 has begun mass production of tower cranes, and used for building construction. In 1941, the tower crane industry standard DIN8770 Germany announced.

據(jù)記載，第一項有關(guān)建筑用塔機(jī)專利頒發(fā)于1900年99爱精品免费视频在线观看。1905年出現(xiàn)了塔身固定的裝有臂架的起重機(jī)久久八视频，1923年制成了近代塔機(jī)的原型樣機(jī)，同年出現(xiàn)第一臺比較完整的近代塔機(jī)在线免费激情视频。1930年當(dāng)時德國已開始批量生產(chǎn)塔機(jī)www.99riav4.com，并用于建筑施工。1941年黄片一区二区免费看，有關(guān)塔機(jī)的德國工業(yè)標(biāo)準(zhǔn)DIN8770公布欧美激情黄色a片网。

In addition, oil fields at sea frequently require installation work, which is why the 3,000 short ton crane was developed. With its 90-meter jib, a 100-ton hoisting block, a total crane weight of over 2,200 tons and its height of over 75 meters, this crane is truly a 'big guy', even by Huisman standards.

另外，海底油田常常需要進(jìn)行安裝工作免费在线黄色视频官网，這也是開發(fā)3000短噸級起重機(jī)的原因亚州激情小说。90米長的起重懸臂，100噸中的起重滑輪五月天激激婷婷大综合换脸，全重超過2200噸最新国产精品久久精品，高度超過75米，即便按照豪氏威馬的標(biāo)準(zhǔn)黄网站在线观看免费播放，這臺起重機(jī)也是一個真正的"大家伙"欧美a网址。

Bottom-slewing crane with luffing jib and towel' with backstays,- Bottom slewmg saddle jih cranes with out backstays, Bottom-slewing cranes with luffing jib

與俯仰運動三角帆的底部旋轉(zhuǎn)與后牽索的起重機(jī)和towel，-與后牽索的底下slewmg馬鞍jih起重機(jī)曰本三级片网站，與俯仰運動三角帆的底部旋轉(zhuǎn)起重機(jī)