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以AP1000核岛厂房结构为研究对象,提出了等刚度-质量简化原则,并基于ANSYS平台实现了复杂核岛结构的等效简化以及核岛振动特性的合理性验证;进而以SuperFLUSH程序为计算平台,通过引入黏性人工边界模拟无限地基辐射阻尼效应,采用等效线性法描述近场地基非线性特征,建立了非岩性地基条件下的核岛厂房结构拟三维地震响应分析模型;最后通过与SASSI程序真三维进行对比研究,验证了所建立拟三维计算模型具有较好的有效性及实用性.
Taking the AP1000 nuclear island plant structure as the research object, the principle of equal stiffness-quality reduction was proposed. Based on the ANSYS platform, the equivalent simplified simplification of the complex nuclear island structure and the rationality verification of the nuclear island vibration characteristics were achieved. The SuperFLUSH program was used as the computing platform. By introducing the artificial artificial boundary to simulate the radiation damping effect of an infinite foundation, and using the equivalent linear method to describe the non-linear characteristics of the near site, a quasi-3D seismic response analysis model of the nuclear island plant structure under non-lithological foundation conditions was established; The comparison of the true three-dimensional of the SASSI program shows that the proposed three-dimensional computation model has better validity and practicability.