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为解决汽机房内设备布置空间紧张的问题,根据工艺优化布置方案,将参考机型发电机下方的一层混凝土中间平台优化为两层钢梁-现浇混凝土板结构,分别搁置封闭母线和低压加热器.中间平台支座处采用隔振装置支撑于柱侧牛腿,以减小基础振动对中间层设备运行的不良影响.通过MFSAP、有限元软件ANSYS分析及模型试验,表明该汽机基础具有良好的动力性能.对比ANSYS采用完全法和模态叠加法有限元模型求解所得到的结果差异,表明模态叠加法节省计算时间并能满足工程精度需要.
In order to solve the problem of space shortage in the equipment room of steam turbine, according to the process optimization layout plan, a concrete intermediate platform beneath the reference generator is optimized to two-story steel beam-cast-in-situ concrete slab structure, Heater.An intermediate platform support is supported by vibration isolation device on the column side of the leg to reduce the negative impact of the foundation vibration on the operation of the middle layer.Through MFSAP and ANSYS finite element analysis and model tests show that the turbine foundation has Good dynamic performance.Compared with the ANSYS complete method and modal superposition finite element model to solve the difference between the results obtained, indicating that the modal superposition method to save time and meet the needs of engineering accuracy.