采用被动吸能器的部分充液容器减振
Vibration Mitigation in Partially Liquid-Filled Vessel using Passive Energy Absorbers
摘要：
本文讨论了在脉冲载荷作用下部分充液贮箱降阶模型的减振问题。这种激励可能导致施加在罐内壁上的液压冲击。考虑了罐壁的有限刚度。我们探讨线性（调谐质量阻尼器）和非线性（非线性能量阱）被动吸振器，缓解性能进行了数值研究。液体晃动质量采用等效的质量弹簧-阻尼器系统来模拟，该系统既能产生小幅线性振荡，又能撞击容器壁。我们使用的参数的等效质量-弹簧-阻尼器系统的良好探索的情况下，圆柱形储罐。水力冲击采用高功率势函数和耗散函数模拟。确定了储罐结构中的临界位置，并推导了相应的局部机械应力表达式。我们使用有限元方法来评估特定系统参数的固有频率，并找出内部共振的可能性。数值评价标准，建议确定能量吸收性能。
英文摘要：
This paper treats possible solutions for vibration mitigation in reduced-order model of partially-filled liquid tank under impulsive forcing. Such excitation may lead to hydraulic impacts applied on the tank inner walls. Finite stiffness of the tank walls is taken into account. We explore both linear (Tuned Mass Damper) and nonlinear (Nonlinear Energy Sink) passive vibration absorbers; mitigation performances are examined numerically. The liquid sloshing mass is modeled by equivalent massspring-dashpot system, which can both perform small-amplitude linear oscillations and impact the vessel walls. We use parameters of the equivalent mass-spring-dashpot system for well-explored case of cylindrical tanks. The hydraulic impacts are modeled by high-power potential and dissipation functions. Critical location in the tank structure is determined and expression of the corresponding local mechanical stress is derived. We use finite-elemet approach to assess the natural frequencies for specific system parameters and to figure out possibilities for internal resonances. Numerical evaluation criteria are suggested to determine the energy absorption performance.
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