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门式起重机广泛用于矿山、港口、造船、水电、军工和重工等行业的安装和装卸作业,其主要结构为门形框架,承载主梁下安装两条支脚,可在地面的轨道上行走。门式起重机在工作时,由于跨度较大,所吊载荷的体积也较大,在运行中容易造成起重机驾驶员与地面指挥人员配合不协调,产生误差,导致柔性腿被所吊载荷撞击等问题,给安全生产带来威胁。1存在的问题门式起重机的门架由主梁、刚性腿和柔性腿组成,结构如图1所示,它是为吊运大型或超大型物件
Gantry cranes are widely used in the installation, loading and unloading operations of mines, ports, shipbuilding, hydropower, military and heavy industries. The main structure of the gantry cranes is a gantry frame. Two supports are installed under the main girder to walk on the ground track. Gantry crane at work, due to the larger span, the volume of suspended load is large, easy to cause in the operation of the crane driver and ground command with the coordination of the uncoordinated, resulting in errors, resulting in the flexible legs were suspended load impact and other issues , To bring safety threats. 1 problems gantry crane gantry by the main beam, rigid legs and flexible legs composition, the structure shown in Figure 1, it is for lifting large or very large objects