本文選題：抓斗挖泥船 + 疏浚抓斗�。� 參考：《武漢理工大學》2014年碩士論文

【摘要】：世界疏浚事業(yè)的不斷興旺發(fā)展，帶動著疏浚設備的更新升級。抓斗挖泥船作為一種通用的疏浚設備也正朝著大型化、智能化、低能耗化的方向發(fā)展，以適應疏浚工程的大型化和規(guī)�；�。能實現(xiàn)平挖作業(yè)的抓斗挖泥船可大幅降低疏浚平整作業(yè)的工程成本，但該平挖控制技術我國基本從國外引進。為突破抓斗挖泥船實現(xiàn)平挖作業(yè)的技術指標，打破國外同類相關產品的技術封鎖，實現(xiàn)同類產品的國產化，我國應加大對相關疏浚技術的研發(fā)投入。因此，對疏浚抓斗的平挖作業(yè)進行研究具有重要的意義。 本文以斗容為3.5m3的長撐桿雙顎板四繩疏浚抓斗為研究對象，分析出控制疏浚抓斗實現(xiàn)平挖作業(yè)的支持繩和閉合繩之間的位移補償量和相互運動關系，期望達到設計要求為±50mm的平挖作業(yè)精度水平，超越現(xiàn)有國外抓斗挖泥船±100mm的平挖作業(yè)精度水平。本文主要做了以下研究： （1）結合疏浚抓斗的工作原理和結構尺寸圖，建立其運動學方程，用Matlab軟件編寫程序并推導出疏浚抓斗的挖掘曲線。 （2）以疏浚抓斗的閉合繩運動（速度時間表達式、位移時間表達式）作為初始條件，結合疏浚抓斗的挖掘曲線研究出支持繩的位移時間表達式、速度時間表達式。 （3）在Solidworks軟件中建立疏浚抓斗的模型，并導入ADAMS軟件中，建立上、下承梁的滑輪組和鋼絲繩卷繞系統(tǒng)，對疏浚抓斗在水下挖掘過程中進行力學分析，并考慮水流和浮力對疏浚抓斗的影響，仿真疏浚抓斗的平挖作業(yè)。 （4）將仿真所得平挖挖掘曲線結果與設計要求的±50mm “平挖精度”相對比，，發(fā)現(xiàn)誤差過大，對位移的補償量做進一步修正，得到二次補償?shù)匿摻z繩位移量，以及支持繩和閉合繩的位移時間和速度時間表達式。 （5）再次進行平挖作業(yè)仿真并分析結果，得到了符合設計精度要求的平挖挖掘曲線，以及疏浚抓斗在正面迎水工作下的擺動曲線和鋼絲繩的受力曲線。 通過以上研究，驗證了上述研究疏浚抓斗實現(xiàn)平挖工況方法的可行性，并為研究該平挖技術提供了一定的理論依據(jù)和參考方法。
[Abstract]:The continuous development of dredging in the world leads to the renewal and upgrading of dredging equipment. As a kind of general dredging equipment, grab dredger is developing towards the direction of large scale, intelligent and low energy consumption, in order to adapt to the large-scale and large-scale dredging engineering. The grab dredger which can realize the flat excavation operation can greatly reduce the engineering cost of dredging and leveling operation, but the flat excavation control technology is basically imported from abroad in our country. In order to break through the technical index of grabbing dredger to realize leveling operation break the technical blockade of foreign similar related products and realize the localization of the same kind of products our country should increase the R & D investment in relevant dredging technology. Therefore, it is of great significance to study the dredging operation of dredging grab. In this paper, the displacement compensation and mutual motion relationship between support rope and closed rope which control dredging grab to realize flat excavation operation are analyzed, taking the long braced double-jaw plate four-rope dredging grab with bucket capacity as 3.5m3 as the research object, and the relation between the displacement compensation and the mutual motion between the support rope and the closing rope which control the dredging grab to realize the flat excavation operation is analyzed. It is expected to reach the level of precision of flat excavation with 鹵50mm as the design requirement, and exceed the level of precision of flat excavation of grab dredger 鹵100mm in foreign countries. This paper mainly does the following research: 1) combined with the working principle and structure size diagram of dredging grab, the kinematics equation of dredging grab is established. The program is written with Matlab software and the excavating curve of dredging grab is deduced. (2) the movement of closed rope (velocity time expression, displacement time expression) of dredged grab is taken as the initial condition, and the displacement time expression and velocity time expression of support rope are obtained by combining the excavation curve of dredging grab. The model of dredging grab is established in Solidworks software, and introduced into ADAMS software, and the pulley group and wire rope winding system of upper and lower beam are established, and the mechanical analysis of dredging grab during underwater excavation is carried out. Considering the influence of water flow and buoyancy on dredging grab, the flat excavation operation of dredging grab is simulated. 4) comparing the simulation results with the 鹵50mm "flat excavation accuracy" required by design, it is found that the error is too large, and the displacement compensation amount is further modified to obtain the secondary compensated displacement of wire rope. And support rope and closed rope displacement time and speed time expressions. 5) the simulation and analysis results of flat excavation operation are carried out again, and the cutting curve of flat excavation, the swinging curve of dredging grab and the stress curve of steel wire rope are obtained according to the requirements of design precision. Through the above research, the feasibility of the above research on dredging grab is verified, and the theoretical basis and reference method are provided for the study of the flat excavation technology.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U616.21

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