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大吨位履带起重机在起臂过程中,臂架作为非线性柔性系统对其稳定性有着重要影响。根据臂架柔性系统力学变化特性,提出基于虚拟样机技术的大吨位履带起重机臂架系统起臂工况的分析方法,构建刚柔动力学模型,通过动力学分析,获得臂架系统的挠度、腰绳拉力及拉板拉力变化情况,探讨影响起臂工况下臂架挠度的因素。实例计算结果表明:基于虚拟样机技术构建的大吨位履带起重机起臂工况臂架系统动力学模型,较直观地反应出起臂过程中臂架挠度和受力变化过程,对起臂中有效降低臂架起臂挠度,降低大吨位履带起重机的作业风险,具有较好的工程应用价值。
Large-tonnage Crawler Crane During boom-up, the boom as a nonlinear flexible system has an important impact on its stability. According to the mechanical characteristics of the flexible system of boom, a method to analyze the boom-up conditions of the boom system of large-tonnage crawler crane based on virtual prototype technology is proposed. The rigid-flexible dynamic model is established. By the dynamic analysis, the deflection of the boom system, Rope tension and pull plate tension changes, to explore the factors that affect the arm under arm deflection conditions. The calculation results show that the dynamic model of the boom system of the large tonnage crawler crane based on the virtual prototype technology can intuitively reflect the process of the boom deflection and force variation, Boom arm deflection, reducing the large tonnage crawler crane job risk, with good engineering value.