作　　者： ; ; ;

机构地区： 中山大学工学院应用力学与工程系

出　　处： 《中山大学学报（自然科学版）》 2006年第2期119-120,128,共3页

摘　　要： 研究了预应力梁的自由振动和受迫振动响应。将预应力桥梁简化为简支的欧拉梁模型,并利用有限元法加以离散。讨论了预应力对梁固有频率和受迫振动响应的影响。研究表明预应力对梁的低阶频率和位移响应的影响较大。 Prestressing force has been used widely with long span structure, and it is the most important factor to describe the load - carrying capacity of the structure. Free and forced vibrations of the beam are studied. The prestressed bridge is modeled as a simply supported Euler-Bernoulli beam and it is discretized using finite element method. The effects of the prestress force on the modal frequencies and dynamic responses are discussed. It is found that the effects of prestress force on the lower natural frequencies and the dynamic displacement response of the beam are large.

关 键 词： 振动 预应力 动力学 动态响应

领　　域： [建筑科学]