双非线性变压器基础隔振降噪研究

李文鹏; 刘海波; 曹春诚; 段炼; 聂京凯; 董光旭; 何强

doi:10.13433/j.cnki.1003-8728.20200273

双非线性变压器基础隔振降噪研究

doi: 10.13433/j.cnki.1003-8728.20200273

1.
国网呼伦贝尔供电公司，内蒙古呼伦贝尔 021100
2.
国网内蒙古东部电力有限公司，呼和浩特 010000
3.
全球能源互联网研究院有限公司，北京 102211
4.
西安交通大学机械结构强度与振动国家重点实验室，西安 710049

基金项目: 国网内蒙古东部电力有限公司科技项目（52660118001F）资助

详细信息

作者简介:
李文鹏（1979−），高级工程师，硕士，研究方向为电网规划，18604700101@163.com

通讯作者:
何强，中级工程师，硕士，d865290612@163.com

中图分类号: O322
计量
- 文章访问数: 245
- HTML全文浏览量: 37
- PDF下载量: 25
- 被引次数: 0
出版历程
- 收稿日期: 2019-12-15
- 网络出版日期: 2021-02-02
- 刊出日期: 2020-12-05

Investigation on the Vibration Isolation and Noise Reduction of Dual- nonlinear Isolation System for Transformer

1.
State Grid Hulunbuir Power Supply Company, Inner Mongolia Hulunbuir 021100, China
2.
State Grid East Inner Mongolia Electric Power Supply Co., Ltd., Hohhot 010000, China
3.
Global Energy Interconnection Research Institute Co., Ltd., Beijing 102211, China
4.
State Key Lab for Mechanical Structural Strength and Vibration, Xi′an Jiaotong University, Xi′an 710049, China

摘要

摘要: 为降低居民区内变压器的振动和噪声对居民生活舒适性的不利影响，基于新型磁性负刚度和几何非线性阻尼设计了一种应用于变压器减振降噪的双非线性隔振系统。采用分子电流方法建立了磁性负刚度弹簧的理论模型，开展了磁力和磁性负刚度性能仿真分析。基于电磁分支电路阻尼提出一种位移-速度依赖的几何非线性阻尼，结合等效磁荷法研究了几何非线性阻尼的机电耦合特性，开展了相应的参数优化设计。应用谐波平衡法仿真分析了应用于变压器减振降噪的双非线性隔振系统的动力学特性，开展了变压器的低频减振降噪性能分析。结果表明：磁性负刚度降低了系统的共振频率，拓宽了隔振频带，有效隔离了变压器低频振动在固体结构中的传播；同时，几何非线性阻尼抑制共振而不影响非共振区振动的衰减，高效抑制了变压器振动噪声的传播。
- 几何非线性阻尼 /
- 速度-位移依赖 /
- 电磁分支电路阻尼 /
- 高静-低动刚度 /
- 隔振
Abstract: To avoid the adverse effects of transformer vibration and noise on residents′ comfort, a dual-nonlinear vibration isolation system for transformer vibration reduction and noise reduction is designed based on the novel magnetic negative stiffness and geometric nonlinear damping. The theoretical model of magnetic negative stiffness spring is established with the current method, and the analysis on magnetic force and negative stiffness performance is carried out. A displacement-velocity-dependent geometric nonlinear damping is proposed based on electromagnetic shunt damping. The electromechanical coupling characteristic of the geometric nonlinear damping is investigated via the equivalent magnetic charge method. The parameter optimization is carried out as well. The dynamics of the dual-nonlinear isolation system for vibration reduction and noise reduction of transformers are studied by harmonic balance method. Then the low frequency vibration attenuation and noise reduction of the transformer are studied. The results show that the magnetic negative stiffness spring reduces the resonance frequency of the system and broadens the isolation bandwidth. And the low-frequency vibration of the transformer is effectively isolated. Moreover, the geometric nonlinear damping can effectively suppress the resonance without affecting the attenuation in the non-resonant region. Finally, the vibration and noise of the transformer can be significantly controlled.
- Geometric nonlinear damping /
- Velocity-displacement-dependent /
- Electromagnetic shunt damping /
- High-static-low-dynamic stiffness /
- Vibration isolation

HTML全文

图 1 双非线性变压器隔振系统

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图 2 磁性负刚度分析

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图 3 隔振器回复力

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图 4 电磁分支电路阻尼

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图 5 径向磁化磁瓦

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图 6 径向磁感应强度B_pr相对z_p变化

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图 7 电磁耦合系数c_m相对z_p变化

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图 8 电磁分支电路阻尼力传递路径

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图 9 几何非线性阻尼系数变化

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图 10 双非线性隔振系统的幅频曲线和不稳定区域（m=0.75 kg，c₀= 5.2 N·s /m，c_m=10/15 N/A，Z_all=1.5 Ω，a=0.08 m和F_e = 3 N）

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图 11 粘性阻尼c₀和电磁耦合系数c_m对力传递率T_f的影响（m=0.75 kg，Z_all=1.5 Ω，a=0.08 m和F_e =3 N）

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图 12 力激励幅值F_e对力传递率T_f的影响（m=0.75kg，Z_all=1.5 Ω和a=0.08 m）

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表 1 磁环参数

磁环	内半径r_in/m	外半径r_out/m	厚度h/m	剩磁强度B_r/T	磁间距 l/m
上-2	0.006	0.0265	0.03	1.45	0.017 (工况Ⅰ)
中-1	0.002	0.0125	0.013	1.45	0.016 (工况Ⅱ)
下-2	0.006	0.0265	0.03	1.45	0.015 (工况Ⅲ)

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表 2 近似刚度系数

工况	k_1a/(N·m⁻¹)	k_3a/10⁶ (N·m⁻³)
Ⅰ	−15140	6.408
Ⅱ	−15220	7.313
Ⅲ	−15245	8.138

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表 3 磁瓦参数

	r₁/m	r₂/m	h/m	(θ₂-θ₁)/(°)	B_r/T
	0.02	0.03	0.02	35	1.45

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