针对电静液作动器系统低频隔声需求，设计了两种花瓣型薄膜声学超材料（Membrane-type Acoustic Metamaterial，MAM），利用COMSOL Multiphysics中声-结构耦合模块对所设计的薄膜型声学超材料的声压级、声传递损失、薄膜法向振动位移、结构模态等进行了有限元分析，并研究了薄膜厚度、薄膜预紧力、薄膜弹性模量对声传递损失的影响规律。结果表明：设计的两种MAM在50Hz-2000Hz上有良好的隔声效果，MAM1能够实现1541Hz的隔声带宽；MAM2的隔声带宽为1620Hz，能够实现多个特征频域的噪声控制。对于MAM1，增大薄膜厚度与薄膜预紧力会增大隔声带宽的下限、隔声峰频率与隔声量，使得声传递损失曲线整体向高频段移动；对于MAM2，增大薄膜预紧力会使得隔声量先增大后减小，增大薄膜厚度，隔声峰所在频率和隔声量都有所增大；薄膜弹性模量同样会拓宽两种MAM的隔声带宽、增大隔声峰所在频率，但是其对于隔声带宽下限和隔声量最大值影响较小。所提出的两种MAM对于低频噪声均由良好的隔离作用，对于低频辐射噪声的控制具有参考意义。

To meet the low-frequency sound insulation requirements of electro-hydrostatic actuator systems, two types of petal-shaped membrane acoustic metamaterials (Membrane-type Acoustic Metamaterial, MAM) were designed. The finite element analysis of the sound pressure level, sound transmission loss, normal vibration displacement of the membrane, and structural modes of the designed membrane-type acoustic metamaterials was conducted using the acoustic-structure coupling module in COMSOL Multiphysics. The influence laws of the membrane thickness, membrane preload, and membrane elastic modulus on the sound transmission loss were also studied. The results show that the two designed MAMs have good sound insulation effects in the frequency range of 1541Hz. MAM1 can achieve a sound insulation bandwidth of 1620Hz, while MAM2 has a sound insulation bandwidth of 1620Hz and can achieve noise control in multiple characteristic frequency domains. For MAM1, increasing the membrane thickness and preload will increase the lower limit of the sound insulation bandwidth, the peak frequency of sound insulation, and the sound transmission loss, causing the sound transmission loss curve to shift towards the high-frequency band. For MAM2, increasing the membrane preload will initially increase and then decrease the sound transmission loss, while increasing the membrane thickness will increase both the frequency at which the sound insulation peak occurs and the sound transmission loss. The membrane elastic modulus will also broaden the sound insulation bandwidth of the MAM and increase the frequency at which the sound insulation peak occurs, but its influence on the lower limit of the sound insulation bandwidth and the maximum value of the sound insulation quantity is relatively small. The proposed two types of MAMs have good isolation effects on low-frequency noise and have reference significance for the control of low-frequency radiated noise.