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莲花电站蜗壳结构为金属蜗壳外包钢筋混凝土，根据蜗壳的钢衬与钢筋混凝土结构为联合承载结构的研究成果，同时参照白山电站蜗壳配筋和混凝土中钢筋应力的观测成果，在莲花电站蜗壳设计中采用了“三维非线性有限元分析”方法。通过“三维有限元分析”与工程类比相结合的方法，使蜗壳设计进一步接近实际，按初设阶段蜗壳设计的钢筋含量２５ｋｇ／ｍ３计算，技施阶段蜗壳设计实际节省钢筋２９３．５ｔ，节省投资约１００万元。经济效益显著，同时也为厂房蜗壳设计积累了经验。
According to the research results of the steel liner of the volute and the reinforced concrete structure as the joint bearing structure, the volute casing structure of the Lianhua Power Station is made of the metal volute casing which is encased in reinforced concrete. According to the observation results of the volute casing reinforcement in Baishan Hydropower Station and the reinforcement stress in the concrete, The design of the power station’s volute adopts “three-dimensional nonlinear finite element analysis” method. Through the combination of “three-dimensional finite element analysis” and engineering analogy, the volute design is further approached to the actual design. According to the steel content of 25kg / m3 in volute design at the initial stage, the volute design actually saves 293.5t , Save about 1000000 yuan investment. Significant economic benefits, but also for the factory spiral case design has accumulated experience.