户内变电站电抗器诱发结构振动与二次噪声研究OACHSSCD

Under specific configurations,indoor substations may position reactors on floor slabs,in-ducing significant structural vibration and structure-borne noise that adversely impacts personnel's work efficiency and mental and physical health.Based on a 220 kV indoor substation as the engineer-ing background,this study obtained a load model of dry-type reactors through field measurements.A refined structural finite element model and an acoustic finite element model of the substation were es-tablished to analyze vibration and secondary noise in sensitive rooms.The research results show that vertical floor vibrations from horizontal reactor loads are non-negligible,necessitating three-directional load application in vibration and noise assessments.Wall vibration constitutes a critical source of in-door secondary noise,exhibiting 1.6 times greater out-of-plane acceleration than vertical floor vibra-tion,with walls contributing 26.5 dB higher noise at the 100 Hz dominant frequency,and the area with the highest sound pressure level in the room is located at the edges of the wall and the junction between the wall and the floor(or ground/ceiling).