论文部分内容阅读
为了解决基于辐射波浪理论的圆形桥墩外域水动水压力表达式极其繁冗、难以计算的问题,对动水压力的影响要素如自由表面波、附加阻尼、附加质量进行了研究,通过数学分析、曲线拟合的方法提出了圆形桥墩外域水动水压力的简化表达式。研究结果表明:自由表面波对附加质量、附加阻尼的影响很小,附加阻尼本身也很小,可不考虑自由表面波以及附加阻尼的影响;刚体运动附加质量近似等于弹性振动附加质量,可用易于计算的刚体运动附加质量替代难以计算的弹性振动附加质量。实际深水桥梁在不同地震波作用下的地震响应计算结果表明,简化表达式具有很高的精度和计算效率。
In order to solve the problem that the expression of hydraulic hydrodynamic pressure outside circular piers based on radiant wave theory is extremely complicated and difficult to calculate, the influence factors of hydrodynamic pressure such as free surface wave, additional damping and additional mass are studied. Through mathematical analysis, The method of curve fitting proposed a simplified expression of hydraulic hydrodynamic pressure outside the circular piers. The results show that the free surface wave has little influence on the additional mass and additional damping, and the additional damping itself is small, without considering the influence of free surface wave and additional damping. The additional mass of rigid body movement is approximately equal to the additional mass of elastic vibration and can be easily calculated The additional mass of rigid body motion replaces the computationally elastic mass of elastic vibration. The seismic response of the actual deepwater bridge under different seismic waves shows that the simplified expression has high accuracy and computational efficiency.