硅钢A计权磁致伸缩速度声压水平计算方法
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摘要
IEC/TR 62581技术报告中引入了A计权速度声压水平用于表征磁致伸缩,但是未对其计算方法进行描述。针对A计权磁致伸缩速度声压水平计算公式中各项参数,详细解析了空气密度、空气中声速、磁致伸缩谐波频率、加权系数、磁致伸缩量等参数的取值方法、取值单位、适用条件。解析结果表明,解析方法可以降低A计权磁致伸缩速度声压水平计算方法的计算难度,提高其应用广度,提供了另一种表征磁致伸缩的计算方法。
In IEC/TR 62581 technical report,A-weighted velocity sound pressure level is introduced to characterize magnetostriction,but its calculation method is not described.In view of the parameters in the formula for calculating the sound pressure level of weighted magnetostriction,this paper analyzes the methods,units and applicable conditions in detail for the parameters such as air density,sound velocity in the air,magnetostriction harmonic frequency,weighting coefficient and magnetostriction quantity.The analytical results show that the analytical method can reduce the difficulty of calculating the acoustic pressure level of A-weighted magnetostriction velocity,and improve its application range.It provides another calculation method to characterize magnetostriction.
In IEC/TR 62581 technical report,A-weighted velocity sound pressure level is introduced to characterize magnetostriction,but its calculation method is not described.In view of the parameters in the formula for calculating the sound pressure level of weighted magnetostriction,this paper analyzes the methods,units and applicable conditions in detail for the parameters such as air density,sound velocity in the air,magnetostriction harmonic frequency,weighting coefficient and magnetostriction quantity.The analytical results show that the analytical method can reduce the difficulty of calculating the acoustic pressure level of A-weighted magnetostriction velocity,and improve its application range.It provides another calculation method to characterize magnetostriction.
引文
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[12]Nakata T,Takahashi N,Nakano M,et al.Magnetostriction measurements with a laser doppler velocimeter[J].Magnetics IEEE Transactions on,1994,30(6):4563.
[13]Hirano M,Ishihara Y,Harada K,et al.A study on measurement of magnetostriction of silicon steel sheet by laser displacement meter[J].Journal of Magnetism and Magnetic Materials,2003,254(9):43.
[14]Finkel P,Garrity E.A method for anhysteretic magnetization and magnetostriction measurement of a thin ferromagnetic films as a function of an applied isotropic stresses[C]∥APS March Meeting.American Physical Society,2006:08D905-08D905-3.
[15]董攀婷.基于硅钢片磁致伸缩本质模型的变压器铁芯振动问题研究[D].济南:山东大学,2015.
[16]IEC/TR 62581-2010,Electrical steel-methods of measurement of the magnetostriction characteristics by means of single sheet and epstein test specimens[S].
[17]沈维道.工程热力学[M].2版.北京:高等教育出版社,1983.
[18]新疆大学物理系力热教研室.普通物理实验讲义:力热部分[M].乌鲁木齐:新疆大学出版社,2000.
[19]中国国家标准准化管理委员会.电声学声级计GB/T 3785[S].北京:中国标准出版社,2010.
[20]中国国家标准准化管理委员会.声学测量中的常用频率GB/T3420-1982[S].北京:中国标准出版社,1982.
[21]陈剑林,白滢,牛锋,等.声级计的频率计权特性[J].计量技术,2008(6):47.
[22]余成波.数字信号处理及MATLAB实现[M].2版.北京:清华大学出版社,2008.
[23]康士臣.高硅硅钢片喷射成形技术的研究[J].粉末冶金工业,2009,19(5):30.
[2]钟文定.铁磁学[M].中册.北京:科学出版社,1987.
[3]朱军,余晋岳,张宏.薄膜磁致伸缩系数λs的简易测量[J].磁性材料及器件,1999(2):22.
[4]应启明,罗梓贤.稀土大磁致伸缩材料研究[J].稀土,1999(1):72.
[5]孙光飞,强文江.磁功能材料[M].北京:化学工业出版社,2007.
[6]谢坡岸,金之俭,饶柱石,等.振动法检测空载变压器绕组的压紧状态[J].高电压技术,2007,33(3):188.
[7]王世山,汲胜昌,李彦明.电缆绕组变压器短路时线圈轴向稳定性的研究[J].中国电机工程学报,2004,24(2):166.
[8]王世山,李彦明.电力变压器绕组电动力的分析计算[J].高压电器,2002,38(4):22.
[9]Weiser B,Pfutzner H,Anger J.Relevance of magnetostriction and forces for the generation of audible noise of transformer cores[J].Magnetics IEEE Transactions on,2000,36(5):3759.
[10]王立涛,施立发,朱国辉,等.硅钢热处理过程涂层中铬的转化试验研究[J].金属功能材料,2017,24(3):39.
[11]Yabumoto M,Arai S,Kawamata R,et al.Recent development in grain-oriented electrical steel with low magnetostriction[J].Journal of Materials Engineering and Performance,1997,6(6):713.
[12]Nakata T,Takahashi N,Nakano M,et al.Magnetostriction measurements with a laser doppler velocimeter[J].Magnetics IEEE Transactions on,1994,30(6):4563.
[13]Hirano M,Ishihara Y,Harada K,et al.A study on measurement of magnetostriction of silicon steel sheet by laser displacement meter[J].Journal of Magnetism and Magnetic Materials,2003,254(9):43.
[14]Finkel P,Garrity E.A method for anhysteretic magnetization and magnetostriction measurement of a thin ferromagnetic films as a function of an applied isotropic stresses[C]∥APS March Meeting.American Physical Society,2006:08D905-08D905-3.
[15]董攀婷.基于硅钢片磁致伸缩本质模型的变压器铁芯振动问题研究[D].济南:山东大学,2015.
[16]IEC/TR 62581-2010,Electrical steel-methods of measurement of the magnetostriction characteristics by means of single sheet and epstein test specimens[S].
[17]沈维道.工程热力学[M].2版.北京:高等教育出版社,1983.
[18]新疆大学物理系力热教研室.普通物理实验讲义:力热部分[M].乌鲁木齐:新疆大学出版社,2000.
[19]中国国家标准准化管理委员会.电声学声级计GB/T 3785[S].北京:中国标准出版社,2010.
[20]中国国家标准准化管理委员会.声学测量中的常用频率GB/T3420-1982[S].北京:中国标准出版社,1982.
[21]陈剑林,白滢,牛锋,等.声级计的频率计权特性[J].计量技术,2008(6):47.
[22]余成波.数字信号处理及MATLAB实现[M].2版.北京:清华大学出版社,2008.
[23]康士臣.高硅硅钢片喷射成形技术的研究[J].粉末冶金工业,2009,19(5):30.