以烈度为8度区域某工程汽机基础设计为背景,针对常规固定式基础地震加速度响应超限等问题,提出采用弹簧隔振汽机基础的优化设计方案,并对隔振基础进行模态、谐响应以及地震响应谱分析,结果表明,弹簧隔振方案在不增加工程造价的情况下,大幅度减少基础底板的钢筋混凝土用量,具有较高技术和环保价值。 Based on the basic design of a steam engine with an area of ​​8 degree in intensity, aiming at the problems such as over-limit of the conventional fixed-type foundation seismic acceleration response, the optimal design scheme based on the spring-isolating steam turbine is proposed and the modal and harmonic response And seismic response spectrum analysis. The results show that the spring vibration isolation scheme can significantly reduce the amount of reinforced concrete used in foundation slab without any increase of project cost, which has high technical and environmental protection value.