动臂塔式起重机防后倾装置的研究

发布时间：2018-08-11 21:11

【摘要】：大型动臂塔式起重机广泛应用于建筑施工中,特别是在高层建筑施工中,其幅度利用率比其他类型起重机高。大型动臂塔式起重机在较小工作幅度突然卸载时,由于变幅拉板的弹性作用力,若无可靠的防后倾装置保护,容易导致臂架后倾,甚至整机倾翻的危险事故。因此,对防后倾装置设计的研究具有重要意义。本文以1600t·m超大型动臂塔式起重机作为研究对象,采用虚拟样机技术对大型动臂塔式起重机防后倾装置进行研究,主要完成的内容： (1)应用Ansys有限元软件建立臂架、人字架、塔身的柔性体模型,应用Pro/E三维造型软件建立回转支座和平衡臂的刚性体模型,应用ADAMS软件建立变幅拉板和防后倾装置,最后,在ADAMS软件中组装成完整的虚拟样机模型。 (2)对按照经验设计的防后倾装置进行仿真,分析防后倾装置作用的效果。选择78m臂长模型作为分析对象,并分析整机动态性能。 (3)研究主要参数的改变,如防后倾弹簧的刚度、防后倾装置铰点的位置,对臂架后倾效果影响的规律,找到防后倾效果最好的参数组合,并和按照经验设计的防后倾装置的防后倾效果进行对比分析,为防后倾装置的设计提供参考。
[Abstract]:Large jib tower cranes are widely used in building construction, especially in high-rise building construction, its amplitude utilization ratio is higher than other types of cranes. When the large jib tower crane suddenly unloads in a small working range, because of the elastic force of the variable amplitude pulling plate, if there is no reliable protection against the backward tilting device, it is easy to lead to the dangerous accident of the arm frame tilting backward, even the whole machine overturning. Therefore, it is of great significance to study the design of anti-tilting device. In this paper, 1600t m super-large cantilever tower crane is used as the research object, virtual prototype technology is used to study the anti-tilting device of the large-sized bobbin crane. The main contents are as follows: (1) using the Ansys finite element software to build the boom. The flexible body model of the herringbone frame, the tower body, the rigid body model of the rotary support and the balance arm by using Pro/E 3D modeling software, and the variable amplitude drawing plate and the anti-backward tilting device with the ADAMS software, finally, A complete virtual prototype model is assembled in ADAMS software. (2) the anti-tilting device designed according to experience is simulated and the effect of anti-tilting device is analyzed. The 78m arm length model is selected as the analysis object, and the dynamic performance of the whole machine is analyzed. (3) the changes of main parameters, such as the stiffness of the anti-tilting spring, the position of the pivot point of the anti-tilting device, and the law of the influence on the backward tilting effect of the arm are studied. The best combination of parameters is found and compared with that of the anti-backward tilting device designed according to the experience, which provides a reference for the design of the anti-tilting device.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH213.3

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