發(fā)布時間：2018-05-12 17:00

  本文選題：雙面修剪機 + ADAMS仿真�。� 參考：《廣西大學》2014年碩士論文

【摘要】：我國高速公路發(fā)展迅速,而綠籬帶的建設已經(jīng)成為高速公路建設的主體部分之一,其修剪任務非常繁重。通過對國內(nèi)外綠籬修剪技術(shù)的分析,并實地考察國內(nèi)高速公路綠籬修剪的現(xiàn)狀,研發(fā)一種針對高速公路綠籬修剪的設備,可以在保證修剪質(zhì)量的同時,有效減少工人勞動強度。 為了提高修剪效率,縮短被修剪路段的封鎖時間,確定了具有雙面修剪功能的整機方案,并對修剪機的功能進行總體規(guī)劃；對水平和豎直修剪機構(gòu)進行具體的設計,并計算選取承載車；在設計選取水平修剪機構(gòu)底部的轉(zhuǎn)動裝置時,發(fā)現(xiàn)目前常見的轉(zhuǎn)動裝置所采用的傳動方式應用在此不夠便捷,因此,本文設計一種新型的回轉(zhuǎn)臺,能夠通過液壓缸的伸縮長度確定其旋轉(zhuǎn)角度,適用于具有與水平修剪機構(gòu)相類似回轉(zhuǎn)動作的產(chǎn)品。 在三維軟件Pro/E中建立模型后,利用ANSYS對水平和豎直修剪機構(gòu)進行有限元靜力分析,根據(jù)結(jié)果對修剪機構(gòu)進行結(jié)構(gòu)優(yōu)化設計,并對優(yōu)化后的機構(gòu)重新進行分析校核,確保其具有足夠的剛度和強度；通過對兩個修剪機構(gòu)進行模態(tài)分析,證明地面和刀具的激振頻率均能避開其固有頻率而不發(fā)生共振；利用多體動力學分析軟件ADAMS,分別對修剪機構(gòu)和整機進行了運動學和動力學仿真,檢驗修剪機動作過程中無“死點”并且未發(fā)生干涉；通過仿真,獲得整個動作過程中各液壓缸受力曲線,從而發(fā)現(xiàn)機構(gòu)的缺點并提出改進方案,同時根據(jù)液壓缸受力計算選取液壓缸和動力源；由于工作時修剪機構(gòu)的外伸使整車重心偏移,影響承載車的操控性,借助于動力裝置設計可移動配重機構(gòu),通過仿真對配重前后輪胎的受力情況進行分析對比,結(jié)果表明該設計能有效解決修剪機進行修剪工作時的重心偏移問題,改善承載車的操控性能,并降低因整車重心偏移而發(fā)生側(cè)翻的可能性。 本文完成了整個雙面高效綠籬修剪機的設計和關(guān)鍵部件的校核工作,并根據(jù)需要做了相關(guān)的仿真研究。結(jié)果表明本文設計的綠籬修剪機是合理可行的,按該設計生產(chǎn)的產(chǎn)品可以應用于高速公路綠籬的修剪。
[Abstract]:The highway of our country develops rapidly, and the construction of hedge belt has become one of the main parts of highway construction, and its pruning task is very heavy. Based on the analysis of the pruning technology at home and abroad and on the spot investigation of the current situation of the domestic highway hedgerow pruning, a kind of equipment for freeway hedgerow pruning has been developed, which can effectively reduce the labor intensity of the workers while ensuring the pruning quality. In order to improve the pruning efficiency and shorten the blocking time of the pruned section, the scheme of the whole machine with double-sided pruning function is determined, and the overall function of the pruning machine is planned, and the horizontal and vertical pruning mechanism is designed concretely. In the design of the rotary device at the bottom of the horizontal pruning mechanism, it is found that the transmission mode used in the current common rotary device is not convenient enough. Therefore, a new type of rotary table is designed in this paper. The rotary angle can be determined by the extension length of the hydraulic cylinder, which is suitable for the products with rotary action similar to the horizontal pruning mechanism. After establishing the model in 3D software Pro/E, the static finite element analysis of horizontal and vertical pruning mechanism is carried out by using ANSYS, and the structural optimization design of the pruning mechanism is carried out according to the results, and the optimized mechanism is analyzed and checked again. Through the modal analysis of the two pruning mechanisms, it is proved that the exciting frequency of the ground and the cutting tool can avoid the natural frequency without resonance. The kinematics and dynamics simulation of the pruning mechanism and the whole machine are carried out by using the multi-body dynamics analysis software Adams. The results show that there is no "dead point" and no interference occurs during the pruning process. The stress curve of each cylinder is obtained during the whole process of operation, and the defects of the mechanism are found and the improvement scheme is put forward. At the same time, the hydraulic cylinder and the power source are selected according to the force of the cylinder, and the center of gravity of the whole car is offset by the extension of the pruning mechanism. Affecting the maneuverability of the load-bearing vehicle, with the help of power device to design the movable counterweight mechanism, through the simulation to analyze and compare the force situation of the tire before and after the weight distribution, The results show that the design can effectively solve the problem of barycenter deviation in pruning machine, improve the handling performance of the vehicle, and reduce the possibility of rollover due to the shift of the barycenter of the whole vehicle. In this paper, the design of the two-sided high-efficiency hedgerow trimmer and the checking of the key parts are completed, and the relevant simulation research is done according to the need. The results show that the hedgerow pruning machine designed in this paper is reasonable and feasible, and the products produced according to the design can be applied to the pruning of freeway hedgerows.
【學位授予單位】：廣西大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU986.32

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本文編號：1879415