水击随机分析在压力管道结构设计中的应用  

Application of Stochastic Analysis of Waterhammer in Structural Design of Penstocks

作　　者：张芹芬[1] 索丽生[1] 

机构地区：[1]河海大学水利水电工程学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2000年第2期17-22,共6页Journal of Hohai University(Natural Sciences)

基　　金：教育部博士点基金资助项目!(97029403)

摘　　要：从水电站压力管道结构可靠度设计的需要出发 ,提出应采用平稳二项随机过程或极值统计法来研究内水压力 (含水击 )这类可变荷载 ;根据静、动两部分荷载的不同特性 (年发生率、持续时间及概率分布等 ) ,通过压力钢管设计算例 ,阐明在结构分项系数设计中应将它们分别作为单独的可变荷载 。To meet the need of the structural design of penstocks with the Load Coefficient Limiting State method,the theory of stationary binomial random process or the extreme value statistical method should be used for the analysis of such variable loads as static pressure waterhammer.The characteristics(annual occurrence sustaining period and probability distribution) of the static and dynamic hydraulic loads are studied in detail,and a practical example of structural design of a penstock is presented.It is deemed that the hydraulic pressure should be treated as two individual stochastic variable loads—the static pressure and the dynamic pressure, and different load coefficients should be adapted,respectively,to reflect their physical features.Especially,the probability distribution of the maximum value in design standard period is employed when dealing with the static hydraulic load, while that of the annual maximum value is utilized for dynamic hydraulic load.

关 键 词：水击 随机分析 压力管道 结构设计 水电站 

分 类 号：TV732.4[水利工程—水利水电工程] TV311