發(fā)布時間：2018-05-02 06:39

  本文選題：軌道式集裝箱龍門起重機 + 動力學(xué)分析　； 參考：《武漢科技大學(xué)》2011年碩士論文

【摘要】：軌道式集裝箱龍門起重機是一種廣泛用于集裝箱堆場裝卸集裝箱的大型起重機械。全球經(jīng)濟一體化和我國對外貿(mào)易的持續(xù)增長帶動了我國港口物流運輸業(yè)的蓬勃發(fā)展。因此,我們對作為港口物流運輸主要工具的軌道式集裝箱龍門起重機的性能要求也越來越高。具體來說,就是要求其額定起重量越來越大,運行速度越來越快,這使得起重機運行時的動載荷隨之增大。另外,由于起重機在工作過程中,運動狀態(tài)經(jīng)常發(fā)生變化,存在著諸多不穩(wěn)定工況,如載荷起升離地、行走時沖擊及碰撞、大小車起動和制動等,在這些工況下起重機結(jié)構(gòu)會受到不同程度的沖擊和振動影響。這樣以來,在對起重機械進行設(shè)計時就不得不考慮各種動載對機械結(jié)構(gòu)的沖擊影響,需要以動態(tài)設(shè)計的方法來對起重機械進行設(shè)計。 本文首先研究了軌道式集裝箱龍門起重機的靜態(tài)和動態(tài)力學(xué)特性。通過靜力學(xué)分析,確定了載荷位于梁中、梁端兩種位置的危險點,并對其強度和剛度進行了校核;結(jié)合有限元參數(shù)化模型,對軌道式集裝箱龍門起重機門架結(jié)構(gòu)進行了模態(tài)分析,提取了前10階固有頻率及振型圖,并對其結(jié)果進行了分析。 其次對軌道式集裝箱龍門起重機突然起吊的動載情況進行了瞬態(tài)分析。得到了軌道式集裝箱龍門起重機起吊離地瞬間的動力響應(yīng),包括主梁垂直位移、垂直速度、垂直加速度與時間的響應(yīng)曲線。 最后通過結(jié)構(gòu)動態(tài)優(yōu)化設(shè)計方法,對整機結(jié)構(gòu)重量進行動態(tài)優(yōu)化設(shè)計。該方法既有效地減輕了整機結(jié)構(gòu)的重量,又保證了整機結(jié)構(gòu)具有良好的靜、動態(tài)性能,達到動態(tài)優(yōu)化設(shè)計的目的。
[Abstract]:Rail-type container gantry crane is a large-scale crane widely used for loading and unloading containers in container yard. Global economic integration and the sustained growth of China's foreign trade have driven the vigorous development of our port logistics industry. Therefore, the performance requirements of rail container gantry crane, which is the main means of port logistics transportation, are becoming higher and higher. Specifically, it is required to increase the rated lifting weight and speed, which makes the dynamic load of crane increase. In addition, because the movement state of crane often changes in the working process, there are many unstable working conditions, such as load lifting and leaving the ground, impact and collision while walking, starting and braking of the trolley, etc. Under these conditions, crane structure will be affected by shock and vibration to varying degrees. In this way, the impact of various dynamic loads on the structure of the crane has to be taken into account in the design of the lifting machinery, and it is necessary to design the lifting machinery by dynamic design method. In this paper, the static and dynamic mechanical properties of the rail container gantry crane are studied. Through statics analysis, the dangerous point of load at the end of beam and beam is determined, and its strength and stiffness are checked, combined with the parameterized finite element model, The modal analysis of the gantry structure of the rail container gantry crane is carried out. The first 10 natural frequencies and vibration patterns are extracted and the results are analyzed. Secondly, the transient analysis of the dynamic load of the rail container gantry crane is carried out. The dynamic response of the rail container gantry crane at the moment of lifting off the ground is obtained, including the response curves of the girder vertical displacement, vertical velocity, vertical acceleration and time. Finally, the dynamic optimization design of the whole machine structure weight is carried out by the method of structural dynamic optimization design. This method not only effectively reduces the weight of the whole machine structure, but also ensures the good static and dynamic performance of the whole machine structure, and achieves the purpose of dynamic optimization design.
【學(xué)位授予單位】：武漢科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH21

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本文編號：1832789