大型斜拉索跨越结构索塔连接优化及模态分析  

Connection Optimization and Modal Analysis of Cable-suspended Structure on Mulong River

作　　者：薛祥祥 郝伟琦 李晓光[1] 孙晓晨[1] 刘磊[1] 张铮一 焦书静 

机构地区：[1]海洋石油工程股份有限公司,天津300452

出　　处：《中国造船》2010年第A02期73-77,共5页Shipbuilding of China

摘　　要：首先运用ANSYS软件对实际工程中的木龙河斜拉桥进行了工作载荷下的受力分析；其次重点研究了斜拉索与塔架不同的连接形式对整个大型结构的受力影响；最后重点分析了该大型结构的固有频率和振型规律。研究表明：调节索的预应变可以提高结构的强度和刚度；合理布局斜拉索与塔架连接处的间距可以提高结构的强度；振动时管桥1／4和跨中、3／4处振动比较大，且以弯曲变形为主。Based on the finite element software ANSYS, the stress condition of cable-suspended structure under proper working load on the Mulong River is gained. The effects of the joints types between towers and stayed-cables on the stress characteristics of the structure are discussed. The natural frequency and shaking patterns of the structure are analyzed. The research indicates, that the change of prestrain can help to increase the strength and stiffness of the structure, as well as the proper distribution of the space between the stayed-cables and the joints of towers can increase the stiffness of the structure. The vibration at the 1/4, 1/2 and 3/4 of the rack bridge are strenuous, and the deformations are primarily flexural deformations.

关 键 词：斜拉桥 强度 刚度 预应变 振动 

分 类 号：O327[理学—一般力学与力学基础]