Dynamic Optimum Design of Tower Crane Structures
-
摘要: 为提高塔式起重机的动态性能,建立了以动刚度为优化目标的塔机结构系统动态优化数学模型.通过模态分析及简谐振动响应分析确定影响塔机动态性能的关键模态频率,并以此作为优化目标,对主要结构参数进行灵敏度分析,以确定塔机动态优化的设计变量.以塔机结构系统质量、静强度、静刚度、动态位移响应幅值等为约束条件.实例分析表明,采用这种动态优化方法,动位移幅值降低59.5%,结构质量减少11.2%.Abstract: To improve the dynamic performances of tower cranes, a dynamic optimum mathematical model was established to optimize the dynamic stiffness.The key modal frequency was determined based on modal analysis and harmonic response analysis, and the modal frequency was taken as the optimization objective.Sensitivity analysis was done for all structural parameters to decide the dynamic optimum design variables.The restraints to the model include mass of the structure, static strengths, static stiffness and dynamic displacement response amplitudes.A design case shows that with the method, the dynamic displacement is reduced by 59.5% with an decrease in mass by 11.2%.
-
Key words:
- tower crane /
- sensitivity analysis /
- finite element /
- nature frequency /
- dynamic optimization
-
JU F,CHOO Y S,CUI F S.Dynamic response of tower crane induced by the pendulum motion of the payload[J].Int.J.Solids Structures,2006,43 (2):376-389.[2] 陆念力,夏拥军,刘明思.塔式起重机动态分析的两种有限元模型及比较[J].建筑机械,2002,(11):49-51.LU Nianli,XIA Yongjun,LIU Mingsi.Structure dynamic analysis with two finite element models for tower crane and their comparison[J].Construction Machinery,2002,(11):49-51.[3] 荣见华,郑健龙,徐飞鸿.结构动力修改及优化设计[M].北京:人民交通出版社,2002:13-25.[4] 廖伯瑜,周新民,尹志宏.现代机械动力学及其工程应用[M].北京:机械工业出版社,2003:110-130.[5] GB3811-83 起重机设计规范[S].北京:中国标准出版社,1983.[6] 程文明,邓斌,王金诺.小车架为弹性结构时门式起重机的动态特性研究[J].西南交通大学学报,2001,36(2):144-148.CHENG Wenming,DENG Bin,WANG Jinnuo.Dynamic characteristics of gantry cranes with an elastic trolley frame[J].Journal of Southwest Jiaotong University,2001,36 (2):144-148. -
点击查看大图
计量
- 文章访问数: 1644
- HTML全文浏览量: 71
- PDF下载量: 528
- 被引次数: 0
下载: