前言 在河床狭窄而水力资源又很丰富的河流上建筑水电站,采用单排布置方案机组往往布置不开。为解决这个问题,国内通常采用地下式厂房,把布置不下的机组移入地下厂房里。地下厂房耗资大且工期长。国外,特别是苏联,常采用双列式布置方案,即在一个机组段,布置两台机组,一台靠近厂房的上游侧,一台靠近下游侧。国内有的水电站也拟采用双列式方案布置机组。为采用此方案提供依据,本文仅就我国西北地区的一个水电站双列式机组支承结构的动力特性研究,从动力特性的角度分析了双列式方案的可行性。支承结构如图1所示,包括楼板梁系统、风罩、矮机墩、蜗壳层及尾水管。计算 Introduction Hydropower stations are built on rivers with narrow riverbed and abundant water resources. Units with single row arrangement are often not arranged. In order to solve this problem, underground plants are usually used in the country to move the arranged units into underground factories. Underground plant costly and long duration. Abroad, especially the Soviet Union, often use double row layout scheme, namely in a unit section, layout of two units, one near the upstream side of the plant, one near the downstream side. Some domestic hydropower stations also intend to use dual-line program layout unit. In order to provide the basis for the application of this scheme, this paper only studies the dynamic characteristics of the double row type unit supporting structure of a hydropower station in Northwest China and analyzes the feasibility of the dual row scheme from the point of view of the dynamic characteristics. Supporting structure shown in Figure 1, including the floor beam system, wind hood, short machine pier, spiral shell and tail pipe. Calculate