According to principle of bridge vibration, this paper lead through boundary condition of free beam and deduce vibrational equation of free beam to solve rigidity and model of vibration.
本文根据桥梁的振动原理，引入简支桥梁的边界条件，推导简支桥梁的振动方程，求解出桥梁刚度、振型的实际运用公式。
The influential factors of complex boundary condition on free-vibration characteristics of real bridge structures are analysed.
针对实际桥梁结构复杂的边界条件，分析其对结构固有振动特性的影响因素。
The continual rigid frame bridge is one kind of important bridge of modern traffic project type, whose temperature problem is always one of bridgework boundary research hot spot.
连续刚构桥是现代交通工程的一种重要桥型，其温度问题一直是桥梁工程界的研究热点之一。
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