Isolation can be used as an effective shock absorption measure for liquid storage tank (LST), but its defect is that pounding may be caused by earthquake. To study the pounding of sliding isolation LST, the Hertz-Damp model is used to simulate the nonlinear pounding behavior, three particle spring-mass simplified calculation model of sliding isolation LST is established, pounding dynamic equation is solved by Newmark-β method, pounding probability curve is fitted by lognormal distribution probability density function, influence of different types of earthquake on pounding probability are studied, and influence of initial gap and friction coefficient on pounding probability are discussed by selecting 20 near-field pulse, near-field no pulse-like, and far-field seismic waves, respectively. Results show that the pounding probability is the largest under the action of near-field pulse-like earthquake and the smallest under the action of near-field no pulse-like earthquake; the pounding probability is close to zero under small earthquake and about 50% under strong earthquake when the initial gap increases to 0.6 m; increasing initial gap can significantly reduce pounding probability; increase range of friction coefficient is limited for sliding isolation LST, so reducing pounding probability by increasing friction coefficient is not an effective way to reduce pounding probability.

隔离可以用作储液罐（LST）的有效减震措施，但其缺点是可能因地震而引起撞击。为了研究滑动隔震LST的碰撞，采用Hertz-Damp模型模拟了非线性隔震行为，建立了滑动隔震LST的三粒子弹簧质量简化计算模型，用Newmark- β求解了碰撞动力学方程。方法，用对数正态分布概率密度函数拟合碰撞概率曲线，研究不同类型地震对碰撞概率的影响，通过选择20个近场脉冲，近场讨论初始间隙和摩擦系数对碰撞概率的影响分别没有脉冲状和远场地震波。结果表明，在近场脉冲状地震作用下，撞击概率最大；在近场无脉冲状地震作用下，撞击概率最小。当初始间隙增加到0.6 m时，在小地震下的撞击概率接近于零，在强地震下的撞击概率约为50％。增大初始间隙可以显着降低撞击的可能性；滑动隔离LST的摩擦系数增加范围受到限制，