【摘要】 全地面起重机塔臂工况下回转起制动过程将对主臂产生较大的扭转冲击等附加动载荷作用,建立全地面起重机塔臂工况臂架系统力学模型,基于机器人动力学理论建立吊重摆振动力学方程,计算吊重在变幅平面和回转平面内的偏摆角,采用第四强度理论计算主臂应力。研究结果表明起动加速时间、吊重绳长对主臂强度有显著影响,不同的塔臂仰角和塔臂长度对主臂强度的影响程度不同。所得结论可为全地面起重机结构设计和现场操作控制提供参考。更多还原

【Abstract】 The rotary starting-braking process has a great torsional and other additional dynamical loads on the boom of a all-terrain crane in tower jib operation. The mechanics model of the boom system is built. With the dynamic equation on load vibration based on the robot dynamics theory, the partial vibration angle of the load in luffing plane and rotating plane is calculated and the boom sreess is checked by the fourth strength theory. The results indicate that the start-up acceleration ramp time and the length of cable have a significant influence on the boom strength. Different elevation angle and length of the tower jib have a diverse effect on the boom strength. The conclusions can be used as the reference for structural design and local control equipped for the all-terrain crane.更多还原