带式舟桥水阻力理论计算方法  

Theoretical Calculation Method of Water Resistance of Ribbon Bridge

作　　者：丁勇 陈赣 文攀 艾鹏程 DING Yong;CHEN Gan;WEN Pan;AI Pengcheng(Army Academy,Wuxi 214035,China;Army Equipment Department,Beijing 100072,China)

机构地区：[1]陆军研究院,江苏无锡214035 [2]陆军装备部,北京100072

出　　处：《陆军工程大学学报》2023年第5期76-83,共8页Journal of Army Engineering University of PLA

基　　金：军内科研项目(LJ20182C020050)。

摘　　要：针对带式舟桥现有水阻力计算公式存在理论值与试验值误差较大的问题,采用数据统计分析的方法,通过对带式舟桥门桥水阻力模型历史试验数据进行回归分析,调整并完善了现有计算公式中关于阻力系数的取值规定;通过运用有限元数值仿真分析的方法,揭示了带式舟桥吃水较小时航速对门桥的水阻力影响更大的作用机理,确定了公式中计算航速的指数与吃水深度的函数关系,建立了修正的水阻力计算公式。模型试验和仿真计算数据验证表明,修正的理论计算公式能够更好地预测门桥在各种工况下的水阻力值,可用于带式舟桥设计过程中的水阻力计算。In order to address the existing error of the ribbon bridge water resistance between values from tests and values from theoretical calculation,the value of resistance coefficient in the existing calculation formula is adjusted and improved by statistical analysis of data and regression analysis of ribbon bridge model test results.With the Computational Fluid Dynamics(CFD),this study reveals that the speed of the ribbon bridge has a greater impact on the water resistance when the draft is small.The relationship between the index of speed and draft in the formula is determined,and the modified water resistance calculation formula is established.The model test and CFD show that the modified water resistance calculation formula can more accurately predict the water resistance of the raft of pontoons under various conditions,which can be used to calculate the water resistance of ribbon bridges.

关 键 词：带式舟桥 水阻力 模型试验 理论计算 

分 类 号：U662.2[交通运输工程—船舶及航道工程]