【摘要】 以某斜拉桥为工程背景,基于ANSYS建立了三维有限元分析模型,分析了斜拉桥自身的动力特性,主要包括自由振动频率、振型特性。结果表明:大跨度斜拉桥自振周期长,频谱密集,自振特性表现出明显的三维性和振型相互耦合的特点。更多还原

【Abstract】 A cable-stayed bridge is taken for study and a 3-D finite element analysis mode with ANSYS is established,the special dynamical characteristics of this bridge are investigated,including the natural frequency,the features of natural models. The result shows that the large span cable-stayed bridge is long natural cycle,spectrum- intensive, the vibration characteristics clearly show three-dimensional modes and the characteristics of mutual coupling.更多还原