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一引言泄槽动应力是水流脉动试验和结构的传递函数试验结果的综合。动应力是水流脉动荷载引起。这项试验研究跨越水流、结构两个试验领域,按目前的试验相似技术,还无法在一个模型上定量测出动应力值,因此分为水流脉动和传递函数两项试验测试,然后以随机振动理论计算出动应力的均方根值。泄槽是个三维的框架结构,被认为是常系数的线弹性系统。水流脉动过程X[t]认为是个平稳随机过程,输入到泄槽系统上,则输出Y[t]也是个平稳随机过程。本试验系统依据频率响应
I. INTRODUCTION The dynamic stress in the gutter is a combination of the test results of the flow pulsation test and the structure transfer function. Dynamic stress is caused by fluctuating water flow. The experimental study spanning the two experimental fields of water flow and structure can not quantitatively measure the dynamic stress value in a model according to the current experimental similar technology. Therefore, the experiment is divided into two tests of water flow pulsation and transfer function, The theoretical calculation of the root mean square value of dynamic stress. Gutter is a three-dimensional frame structure that is considered as a linear elastic system of constant coefficients. Flow pulsation process X [t] is regarded as a stationary stochastic process and is input to the discharge system. The output Y [t] is also a stationary stochastic process. The test system based on frequency response