中文摘要：

传统电液振动台由于受伺服阀频响特性的限制,其工作频率难以提高到较高的水平。为此提出一种基于2D激振阀的高频电液振动台,由于2D激振阀是一种特殊结构的转阀,通过提高2D激振阀阀芯的转速可以使电液振动台的工作频率实现大幅提高。分析了高频电液振动台的工作原理,并建立了其数学模型,为了验证理论分析以及高频电液振动台工作时的实际输出振动波形,设计了高频电液振动台并进行了实验研究。实验结果表明：基于2D激振阀的电液振动台能大幅提高振动频率,振动台输出的振动频率达到800Hz,远远高于现有传统电液振动台的振动频率。

英文摘要：

The vibration frequency of traditional electro-hydraulic shaking table is very difficult to rise a higher range due to restriction of working frequency of servo valve. Therefore the high-frequency electro-hydraulic shaking table based on 2D exciting valve was proposed. Because 2D exciting valve is a special rotating valve, the vibration fre- quency of electro-hydraulic shaking table can be enhanced largely through improving the rotating speed of spool of 2D exciting valve. The scheme of high-frequency electro-hydraulic shaking table was analyzed and the mathemati- cal model was built. In order to verify the theoretical analysis and the real vibration waveform of high-frequency electro-hydraulic shaking table, the high-frequency electro-hydraulic shaking table was designed and experimented. Experimental results show the high-frequency electro-hydraulic shaking table based on 2D exciting valve can im- prove the working frequency highly, and the vibration frequency of high-frequency electro-hydraulic shaking table can realize 1 000 Hz, far higher than the vibration frequency of traditional electro-hydraulic shaking table.