水电站埋藏式加劲压力钢管的结构计算与设计优化  

Structural computation and design optimization for buried stiffened-penstock of hydropower station

作　　者：关沛文[1] 

机构地区：[1]中南水电勘测设计研究院,长沙410014

出　　处：《水力发电学报》2006年第2期113-117,共5页Journal of Hydroelectric Engineering

摘　　要：作者根据圆柱壳的轴对称弯曲理论,推导出地下加劲埋管结构计算的理论公式,并据此编制出地下埋管结构应力计算和设计优化程序，该程序在满足规范规定的各种约束条件下,以管壁厚度、加劲环间距、高度和厚度等作为变量,以每米钢管的总用钢量为目标函数,进行结构应力计算和工程量比较,从中选出用钢量相对最小的设计方案.计算表明：当地质条件中等,内、外水压力较大时,采用本计算方法与按规范规定的设计方法并同样进行了优化设计后的结果相比,每米钢管的用钢量可节约5%～18%左右。The theoretical formula for structural computation of buried stiffened-pipes is derived based on the axisymmetric bending theory of cylinders and thereby a program of structural stress computation and design optimization of buried pipes are developed. On the premise of satisfying all constraint conditions stipulated in the codes with the pipe thickness, spacing, height and thickness of stiffener rings as variables and the total steel quantity per meter of pipe as objective function, the program is developed for structural stress computation and comparison of total steel quantity used so as to select the altemative with smallest total steel quantity per meter of pipe. The computation indicates that in case of medium geological conditions and quite large intemal and extemal water pressures, the results are obtained from this optimization program and from the design method specified in the codes, the former can save 5% ～18% of the total steel quantity per meter of pipe.

关 键 词：水工结构 设计优化 结构计算 压力钢管 加劲环 水电站 

分 类 号：TV314[水利工程—水工结构工程]