CAJ | 학술논문

介绍了钢筋石笼起动流速的研究现状，针对其不足，用石笼实际边长代替化引直径，经过理论推导，提出了以拖拽力系数为主要待定参数的钢筋石笼起动流速简化公式，并在此基础上进行了a×a×c形石笼的起动流速水槽试验。通过试验，分析了扁度与稳定性的关系，得到了不同扁度所对应的拖拽力系数值并讨论了底部摩擦力系数f 给钢筋石笼稳定性所带来的重要影响。此外，为更好地了解钢筋石笼周围流场的特性，构建了一个透水性绕流数值模型，并以大涡模拟为计算手段，对透水性绕流场进行了三维数值模拟。通过将模拟结果与非透水性绕流场从流场结构、涡体脱落、静压强分布以及拖拽力系数等方面进行定性、定量的对比分析，得到了透水性对流场的具体影响结果。
개소료강근석롱기동류속적연구현상，침대기불족，용석롱실제변장대체화인직경，경과이론추도，제출료이타예력계수위주요대정삼수적강근석롱기동류속간화공식，병재차기출상진행료a×a×c형석롱적기동류속수조시험。통과시험，분석료편도여은정성적관계，득도료불동편도소대응적타예력계수치병토론료저부마찰력계수f 급강근석롱은정성소대래적중요영향。차외，위경호지료해강근석롱주위류장적특성，구건료일개투수성요류수치모형，병이대와모의위계산수단，대투수성요류장진행료삼유수치모의。통과장모의결과여비투수성요류장종류장결구、와체탈락、정압강분포이급타예력계수등방면진행정성、정량적대비분석，득도료투수성대류장적구체영향결과。
An introduction to the status of research in the field of the critical velocity of rock-filled steel cage is de-scribed. Considering the deficiencies of studies in the past,a concise formula in which the drag coefficient is the main undetermined parameter is proposed to calculate the critical velocity of rock-filled steel cage. In the formula,cage length,instead of the transformed diameter,is employed. A flume test is also carried out for the cage in the shape of a × a × c . According to the experimental results,the relationship between the flatness and the stability of the cage under water is analyzed,and the value of drag coefficient under different flatness is obtained. The great influence of friction coefficient on the stability of rock-filled steel cage is also discussed. Besides,for a better understanding of the flow field around the cage,a large eddy simulation is employed to simulate the three dimensional structure of the flow passing a pervious cubic-blunt body at Re=2.2×104. Thus,the characteristics of this kind of flow field and its concrete effects are concluded from the aspects of flow field structure,vortex shedding,drag coefficient and static pressure distribution.