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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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桥梁颤振方程降阶法及临界风速公式简化
, PP. 105-109
Keywords: 桥梁工程,简化公式,降阶法,颤振,临界风速
Abstract:
基于平板颤振理论，建立了桥梁断面在空气中的含有8个颤振导数的二维耦合颤振方程，通过合理假设，令方程两边的实部和虚部分别相等，并化简分析，提出了一种降阶求解方法。与典型方法及其他方法相比，降低了方程阶次，简化了计算方程式。此外，根据《公路桥梁抗风设计规范》的大跨桥梁竖弯基频公式和扭转基频公式，基于VanderPut公式，结合工程实例，建立了大跨度斜拉桥颤振临界风速简化计算公式。通过结合实例对比分析竖弯基频近似公式和颤振临界风速简化公式简便，精度满足实际工程的要求。
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