利用双气室式液阻减振器的较精细三维流-固耦合有限元仿真分析模型获得了减振器的高速阻尼特性，并进行了实验验证。系统地分析了双气室式液阻减振器在不同初始气室容积、初始充气压强下的高速阻尼特性，并与相应的单气室式液阻减振器的阻尼特性进行了对比。单气室式液阻减振器压缩室内气室会增加压缩行程中油液的空化可能性，双气室式液阻减振器可克服这一问题，但会导致行程初期阻尼力的延迟反向。选择较小气室容积、较大充气压强的参数匹配方案可获得较好的阻尼特性；阻尼力反向迟滞时长比值随活塞振动频率的增大而增大；在活塞位移幅值相同的工况下，压缩行程迟滞阻尼力比值随频率的增大（2.5~15 Hz）而减小，伸张行程迟滞阻尼力比值随着活塞振动频率的增大先增大（2.5~10 Hz）、后减小（10~15 Hz）。该研究结果对于双气室式液阻减振器的设计具有重要意义。

A three-dimensional fluid-structure interaction (FSI) finite element model of a twin gas-chamber hydraulic damper was used to study the high-speed damping characteristics of the damper. The numerical results agreed well with experimental data. The damping characteristics were analyzed for various initial gas chamber volumes and initial pressures with comparisons with a single gas-chamber hydraulic damper. A single pressurized gas sub-chamber in the compression chamber of a monotube hydraulic damper results in more oil cavitation during the compression stroke. The twin gas-chamber hydraulic damper overcomes this problem but still has delayed reverse damping in both the compression and extension strokes. This problem can be reduced by using smaller gas chambers with higher initial gas pressures. The time delay ratio of the damping force reverse increases with increasing piston vibration frequency. The damping force reverse delay ratio in the compression stroke decreases with increasing piston vibration frequency (2.5~15 Hz) for the same vibration displacement, but this ratio in the extension stroke first increases (2.5~10 Hz) and then decreases (10~15 Hz) with increasing frequency. These characteristics are important when designing twin gas-chamber hydraulic dampers.