CAJ | 학술논문

介绍了深水桥墩液固耦合模型在ANSYS软件中模型的建立。利用Morison方程提出的附加质量概念考虑动水压力对桥墩作用，采用3种截面积相等的不同类型桥墩，即淹没水深相同时，所受动水压力相等。利用ANSYS建立实体单元与Fluid30单元来分析液固耦合作用对不同类型桥墩的自振特性影响。通过实例分析发现液固耦合对桥墩自振频率的影响是显著的，桥墩完全被水淹没时，其自振频率最大下降了24.2％。进一步研究发现相同截面面积的不同类型的桥墩，在相同水深时，由于其液固耦合接触面沿坐标轴方向上的正投影面积大小不一样，造成桥墩沿该方向上自振频率下降量大不相同。且沿坐标轴方向正截面面积越大，桥墩沿该轴方向上的弯曲自振频率和扭曲自振频率下降越大。
개소료심수교돈액고우합모형재ANSYS연건중모형적건립。이용Morison방정제출적부가질량개념고필동수압력대교돈작용，채용3충절면적상등적불동류형교돈，즉엄몰수심상동시，소수동수압력상등。이용ANSYS건립실체단원여Fluid30단원래분석액고우합작용대불동류형교돈적자진특성영향。통과실례분석발현액고우합대교돈자진빈솔적영향시현저적，교돈완전피수엄몰시，기자진빈솔최대하강료24.2％。진일보연구발현상동절면면적적불동류형적교돈，재상동수심시，유우기액고우합접촉면연좌표축방향상적정투영면적대소불일양，조성교돈연해방향상자진빈솔하강량대불상동。차연좌표축방향정절면면적월대，교돈연해축방향상적만곡자진빈솔화뉴곡자진빈솔하강월대。
This paper mainly analyzes the establishment of liquid-solid coupling model of deep-water piers in AN?SYS software. Through the additional quality resulting from Morison equation, it explores the hydrodynamic pres?sure on three different types of piers with equal cross-sectional areas, which would subject to the same hydrody?namic pressure in water of the same depth. Then, it establishes a solid unit and Fluid30 unit by use of ANSYS to analyze effects of liquid-solid coupling on vibration frequency of different piers. Through the case study, it found out that effects of liquid-solid coupling on the pier's vibration frequency was significant and its biggest decrease of the vibration frequency was 24.2% when the pier was completely submerged in water. Further research showed that for the different piers of the same cross-sectional areas in water of the same depth, the vibration frequency de?clined differently due to different liquid-solid coupling orthographic projection of the contact surface area along the axis direction. It maintains that the greater the coordinate axis cross-sectional area along the positive direction is, the more the bending vibration frequency and distortional natural frequency along the axis decreases.