模态共振液压脉动衰减器仿真与实验研究
Experiment and Simulation Research on the Modal Resonance Hydraulic Pulsation Attenuator

为了衰减液压脉动，提出一种模态共振液压脉动衰减器结构，利用共振板的多模态拓宽衰减频率范围。当液压油的脉动频率接近共振板的某一阶固有频率时，就会激发相应的振型将该频率成分的脉动能量最大限度衰减掉。选择合适的材质，合理设计共振板的结构使共振板固有频率分布得均匀而密集，使模态共振脉动衰减器具备广谱消声效果。用LMS Virtual. Lab对模态共振液压脉动衰减器进行声振耦合模态计算，并进行样机试验测试。研究结果表明：模态共振液压脉动衰减器结构紧凑、消声频率广、消声效果良好。
In order to attenuate hydraulic pressure pulsation, the structure of modal resonance hydraulic pulsation attenuator is proposed based on the principle of resonance attenuation. The resonance plate has multiple modes which widen the attenuation frequency range. When the pulsation frequency of the hydraulic system approaches to one of the modal frequencies, the corresponding mode will be aroused to attenuate the pulsation energy. Selecting suitable materials and designing the resonant structure can make its natural frequencies distributed evenly and densely, so that the pulsation attenuator has perfect performance for wide frequency range. The acoustic-vibration coupling simulation and experimental tests show that the modal resonance hydraulic pulsation attenuator has the advantages of compact structure, wide attenuation frequency range, and excellent silencing performance