论文部分内容阅读
根据小舜江输水泵站工程结构特点,选取#3、#4机组段厂房结构及其地基建立了厂房结构的三维有限元模型,采用三维有限元动力时程分析方法分析了小舜江输水泵站厂房结构关键部位的应力和变形,并对其工作性态进行了安全评价。结果表明,关机工况下厂房结构的动拉、压应力极值均出现于#3机组段下游主梁跨中部位,最大动拉、压应力分别为0.829、-0.837MPa,均小于材料的抗拉和抗压强度设计值;开、关机工况下厂房结构在垂直方向上的振幅极值同样出现于#3机组段下游主梁跨中部位,开、关机工况下的最大振幅分别为0.352、0.815mm,均超出规范允许值0.15mm,因此需对泵站厂房结构振幅过大部位进行减振处理。
According to the structural characteristics of Xiaoshunjiang pumping station, the three-dimensional finite element model of the plant structure was established by choosing the plant structure of # 3 and # 4 units and the foundations of the foundation. The three-dimensional finite element dynamic time history analysis Stress and deformation of the key parts of the pumping station plant structure, and carried out safety evaluation of the working state. The results show that the dynamic tensile and compressive stress extreme values of the plant structure under shut-down conditions all appear in the mid-span of the main girder downstream of the # 3 unit section. The maximum dynamic tensile and compressive stresses are 0.829 and -0.837 MPa, respectively, Pull and compressive strength design values; the vertical amplitude of the plant structure under the open and shut down conditions also appear in the mid-span of the main girder downstream of the # 3 unit section, the maximum amplitudes under open and shut down conditions are 0.352 , 0.815mm, are beyond the allowable value of the standard 0.15mm, so the pumping station plant structure to be excessive vibration damping parts.