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多年来,浓缩池结构已被电力及冶金系统广泛采用,在火电厂用来排除煤灰,在冶金采矿场用来选矿。但对该结构的静力计算,多为简化成平面结构计算,其动力计算的文章很少见到。本文按三维有限元法采用SAP5动力程序,对该空间结构计算了前七阶固有频率与振型。又用振型迭加法计算了七度地震力作用下结构的动态应力响应。计算中考虑了液体质量对结构自振频率及动力响应的影响。并应用G.W.Housner提出的能量等效原理,计算了液体等效质量;又结合有限元方法的特点,讨论了地震荷载输入问题。本文的结果,为浓缩池结构的合理设计提供了重要依据,并已用于工程实际。
Over the years, the structure of the enrichment tank has been widely used in power and metallurgical systems. In thermal power plants, coal ash is used to remove coal ash, and metallurgical mining sites are used for beneficiation. However, the static calculation of the structure is mostly simplified plane structure calculation, and its dynamic calculation articles are rarely seen. In this paper, SAP5 power program is used according to the three-dimensional finite element method, and the first seven natural frequencies and modes are calculated for this space structure. In addition, the dynamic stress response of the structure under the influence of the 7 degree seismic force was calculated by using the vibration mode superposition method. The influence of the liquid mass on the natural frequency and dynamic response of the structure is considered in the calculation. The energy equivalent principle proposed by G.W. Housner was used to calculate the liquid equivalent quality. Combined with the characteristics of the finite element method, the seismic load input problem was discussed. The results of this paper provide an important basis for the rational design of the pool structure and have been used in engineering practice.