大型储罐的抗震性能关系到国家战略能源储备的安全，基础隔震是常用的抗震措施，能够降低地震对储罐底部的破坏，但无法控制储罐中的流体晃动，大幅非线性晃动经常导致储罐上部与罐顶的破坏，现有的计算模型难以研究粘性流体的非线性晃动控制及稳定性。本项目将发展一种适用于粘性流体非线性晃动的半解析法，然后结合储罐的有限元模型建立高效、可靠的流-固耦合模型，研究基础隔震储罐中粘性流体非线性晃动的控制机理。研究内容主要包括：基于实验揭示隔板与隔震支座对粘性流体晃动的影响规律；建立带隔板储罐中粘性流体非线性晃动模型，考虑多种能量耗散机制建立流体晃动阻尼模型，研究隔板的晃动控制机理；建立流体、储罐、隔板以及隔震支座相互耦合的动力学模型，研究晃动控制与基础隔震的耦合作用机制，为综合抗震系统的优化设计提供理论依据。该项目的成功实施，对大型储液罐的抗震设计具有重要意义。

The safety of the State Strategic Energy Reserve strongly depends on the anti-seismic capability of the liquid storage container. Base isolation is a widely used anti-seismic measure which can effectively reduce the damage caused by earthquake to the bottom of a storage container, but control of the liquid sloshing in the container is not possible. Violent liquid sloshing often leads to the buckling of the upper container wall and the damage of the container roof, and existing calculation models cannot be used to deal with the non-linear sloshing of viscous liquid. This program will present a semi-analytical method that is applicable to the non-linear sloshing of viscous liquid, and incorporate the finite element model of the container to establish an efficient and reliable fluid-structure-interaction model, which can be used to study the viscous liquid sloshing control in the base-isolated liquid storage container. The research contents include: revealing the effects of the baffle and base isolation on the liquid sloshing based on experiments; developing a semi-analytical model of the liquid sloshing in the baffled container, considering various dissipation mechanisms for establishing the sloshing damping model, investigating the control mechanism of the anti-sloshing baffle; developing the coupling fluid-container-baffle-bearing system, studying the coupled effect of the anti-sloshing baffle and base isolation, so as providing theoretical foundation for optimization design of comprehensive anti-seismic systems. The successful implementation of this project will help to improve the strategies of protecting liquid storage containers.