浮桥结构在移动载荷作用下的振动响应

Vibration response of a moored multi-span uniform floating bridge under a moving load

浮桥的载荷具有移动性,并有可能在同时遭受风、浪、流联合作用的恶劣环境中使用。为了使浮桥的设计做到既经济又安全,必须对浮桥的载荷和强度有一个比较精确的评估方法。推导了适合模型计算的用户单元的特性矩阵,并将该用户单元导入现有大型有限元分析程序ABAQUS,利用其功能强大的求解器,求解了静水中自由浮式均匀梁在移动载荷作用下的振动响应,为后续研究奠定了基础。

The floating bridge is of great importance in both martial and civil fields. In recent years, more and more attention has been paid to it. The load acting on the floating bridge is moving and the bridge may sometimes suffer from the load combined with the wind, wave and current. Therefore, in order to design the floating bridge safely and economically, a relatively accurate way should be developed to assess its load and strength. In this article, the property matrixes of the user elements are deduced, and introduced into the finite element analysis softwareABAQUS. By means of its powerful solver, the dynamic response of a moored multispan uniform floating bridge under a moving load is analyzed, which may be used as the base for further studies.