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.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
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)
关键词
水击
随机分析
压力管道
结构设计
水电站
waterhammer
stochastic analysis
penstock
structural reliability analysis
