基于隔振基座的水冷冷水机组隔振设计和测试
Vibration isolation design and test of water-cooled chillers based on vibration isolation bases
摘要：
以某核电厂的水冷冷水机组为研究对象,结合隔振理论与试验验证,分析了隔振基座设计的隔振效果。基于隔振系统基本原理,提出以插入损失为核心评价指标,构建了隔振性能评估体系。通过阻抗特性测试与振动测试,获取了隔振基座在50 Hz特征频率下的动态特性参数。测试结果表明,隔振系统在额定工况下实测平均插入损失达25.4 dB(A声级),等效的力传递率显著低于核电厂房要求的0.05的目标限值,验证了隔振设计的有效性。研究结果证实,基于隔振基座的核级水冷冷水机组可有效抑制振动传递路径,提升核级设备运行稳定性,为核级抗震设备隔振设计提供了理论与实践依据。
Abstract：
Taking the water-cooled chiller of a certain nuclear power plant as the research object, the vibration isolation effect is analysed through the design of a vibration isolation base, combined with vibration isolation theory and experimental verification. Based on the basic principles of vibration isolation systems, this paper proposes an evaluation system for vibration isolation performance with insertion loss as the core evaluation index. By conducting impedance characteristic test and vibration test, the dynamic characteristic parameters of the vibration isolation base at the 50 Hz characteristic frequency are obtained. The test results show that under the rated conditions, the vibration isolation system achieves a measured average insertion loss of 25.4 dB (A-weighted), and the equivalent force transmission rate is significantly lower than the target limit of 0.05 required for nuclear power plant buildings, verifying the effectiveness of the vibration isolation design. The research results confirm that nuclear-grade water-cooled chillers based on vibration isolation bases can effectively suppress vibration transmission paths, and improve the operational stability of nuclear-grade equipment, providing theoretical and practical support for the vibration isolation design of nuclear-grade seismic-resistant equipment.
Keywords:nuclear power plant; vibration isolation base; water-cooled chiller; vibration isolation design; force transmission rate; insertion loss; vibration level drop