混合动态子结构综合法在塔机动力学分析中的应用  

Applying hybrid dynamic substructure synthetic method to dynamic analysis for tower crane

作　　者：王蔚佳[1,2] 刘成毅[3] 钟伟 李正良[1,2] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [3]四川建筑职业技术学院,四川德阳618000 [4]广西建工集团第一安装有限公司,广西南宁530001

出　　处：《重庆大学学报（自然科学版）》2011年第8期114-120,共7页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(50678181)

摘　　要：提出了一种基于混合动态子结构综合法的塔机动力学分析模型,结合建筑施工现场的特点,获得塔机系统实测振动周期,判别远距离附着塔机使用的安全可靠性。该方法分别用传递矩阵法和柔度法建立塔身和塔顶系统子结构在起升平面内的振动数学模型。根据子结构结合界面的运动及动力协调条件建立塔机的频率方程,并首次应用于施工现场QTZ5013型塔机的动力学分析和附着装置及塔身的参数识别。结果表明,识别计算值与仪器测试结果接近。对柔性远距离附着塔机,采用引入动载系数对塔机作静力学验算的方法与工程实际存在较大误差。提出对这类塔机应进行附着装置刚度系数现场测试识别,以便及时采取应对措施,防止塔机倒塌事故的发生。This paper presents a dynamic hybrid substructure synthetic method for tower crane dynamic analysis.This method employs the transfer matrix method and the flexibility degree method respectively to formulate the vibration mathematical models of the tower body and tower top system substructures in the hoisting luffing plane.Based on the motion of the substructures in the interface and the dynamic harmonize condition,the frequency equations are established.Then the program is designed according to the mathematical models and firstly applied to the dynamic analysis of the QTZ63 tower crane in the construction site and the parameter identification of attached device and tower body.The test results show that the value calculated by the above method is quite approximate to the instrument measured value,which can meet the engineering requirements.Further study has found that,for the flexible long-distance attached tower crane,the method that introduces dynamic load coefficient for statics analysis of tower cranes is unprecise enough since there exist errors.This paper suggests to conduct site test and identification of the rigidity coefficient of attached device of the tower crane for the accident prevention of tower crane collapse by timely take measures.

关 键 词：塔式起重机 柔性附着 子结构综合法 动力分析 

分 类 号：TH212[机械工程—机械制造及自动化]