针对低、高压轴流送风机及多级轴流压缩机在低流量区域的失速喘振特性及其预防措施进行了分析。
The stall surging characteristic and its prevention measure are analysed with focus on low-pressure axial fan, high-pressure axial fan and mutiple-stage axial compressor.
研究结果发现，组合共振区域内发生两种不同的拟周期运动和组合周期运动，而且第一振型次谐波共振曲线延伸到组合共振区域。
The results obtained show that several motions may occur in the region of combination resonance, including two kinds of quasi-periodic vibrations and combined periodic motion.
风流经过大跨屋面时，由于气流分离在屋面的大部分区域产生强大的吸力，并引起柔性屋面结构的振动，因此大跨屋面结构抗风设计需考虑风振响应和风振系数。
The wind load has recently become a major concern in wind-resistant design of long-span roof structures due to their characteristics: light, flexible, lightly damped, low natural frequency and so on.
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