摘要
采用动态子结构方法在有限元平台上建立了7 500t浮式起重机的动力学模型,应用动态分层优化方法进行整体层和局部层的动态优化.在整体层,实现整体结构的尺寸参数优化,提高臂架在起升平面内弯曲模态的固有频率;在局部层,实现关键子结构的截面参数优化,改善关键子结构的动刚度.通过动态优化设计,有效改善了7 500t浮式起重机金属结构的动态特性,提高了其主要模态的动刚度.
By applying the dynamic substructure method, a dynamical model is constructed for the 7 500 t floating crane. Accordingly, the global and local levels are dynamically optimized using the multi-level opti- mization method. In the global level, the dimensional parameters of global plane are optimized to increase the jib inherent frequency of bending mode within the hoisting surface. In the local level, the cross-sectional parameters of key substructures are optimized to enhance the dynamic stiffness. Through the dynamic optimization design, the metal-structure dynamic properties of the 7 500 t floating crane is effectively improved so as to promote the dynamic stiffness of the major modes.
出处
《中国工程机械学报》
2012年第2期161-165,共5页
Chinese Journal of Construction Machinery
基金
国家"八六三"高技术研究发展计划资助项目(2009AA04300)
国家自然科学基金资助项目(50975207
51075304)
中央高校基本科研业务费专项资金资助项目
关键词
浮式起重机
动态优化设计
模态综合法
动态子结构法
有限单元法
floating crane
dynamic optimization design
component mode synthesis~ dynamic substructure method
finite element method
