硬岩掘进机推进液压缸结构参数优化

针对硬岩掘进机(Tunnel boring machine,TBM)破岩掘进过程中强振动对推进液压缸动态特性的影响，建立了推进液压缸轴向基础振动下的动态响应数学模型，并试验验证了模型的正确性。仿真研究了不同基础振动参数下液压缸失效区域，液压缸无杆腔压力波动幅值与轴向基础振动幅值成线性正相关，且在固有频率处最大，超过固有频率继续增大至90 Hz时压力波动幅值可视为定值。应用响应曲面法对液压缸结构参数进行了优化，优化后的液压缸正常工作能承受的基础振动幅值-频率范围较优化前拓宽了45%。利用响应曲面法对液压缸进行结构参数优化可为TBM推进液压缸设计和选型提供理论依据。

Structure Parameters Optimization of Thrust Hydraulic Cylinder under Foundation Vibration

Against the impact of strong vibration on the dynamic performance of thrust hydraulic cylinder during the process of Tunnel boring machine(TBM)’s rock break and excavation, the dynamic response of the mathematical model of hydraulic cylinder under the axial foundation vibration is built, and the correctness of the model is experimentally verified. Thrust hydraulic cylinder failure region under different vibration parameters is studied, the pressure fluctuation amplitude is positive linear correlated to vibration amplitude, and maximum when vibration frequency is near to natural frequencies, and can be considered as a constant when increase to 90 Hz. Structure parameters are optimized by response surface methodology. Optimized hydraulic cylinder can withstand vibration amplitude-frequency region wider than 45% before optimization when normally works. The optimization of hydraulic cylinder structural parameters by response surface methodology can provide theoretical basis for the design and selection of TBM thrust hydraulic cylinder.