Please wait a minute...
J4  2010, Vol. 44 Issue (1): 19-22    DOI: 10.3785/j.issn.1008-973X.2010.01.004
机械工程     
镁合金AZ31阻尼性能的实验研究
陈馨蕊,郝志勇,杨陈
(浙江大学 机械与能源工程学院,浙江 杭州 310027)
Experimental study on damping performance of magnesium alloy AZ31
CHEN Xin-rui, HAO Zhi-yong, YANG Chen
(College of Mechanical and Energy Engineering, Zhejiang University, Hangzhou 310027, China)
 全文: PDF 
摘要:

采用脉冲响应衰减法研究镁合金AZ31的减振降噪效果.由脉冲激励激发镁合金薄板自由振动,测得镁合金薄板表面的辐射声压,将声压信号进行带通滤波,分离出薄板各个简正振动对应的辐射声压,或分析带宽内几个简正振动产生的复合声压,将该声压信号曲线进行多项式拟合,由拟合曲线的斜率得出镁合金的阻尼损耗因子,并与钢的阻尼性能进行比较.结果表明,镁合金的阻尼损耗因子随频率的增大逐渐减小,在660、1 090、1 230和1 760 Hz处存在阻尼峰值,是减振性能最佳的频率.在中低频段,镁合金的阻尼性能约为钢的2、3倍.镁合金构件在使用中必将体现出良好的抗冲击和减振降噪性能.

关键词: 镁合金脉冲响应衰减法声压信号阻尼    
Abstract:

Vibration damping and noise reduction effects of magnesium alloy AZ31 was researched with the impulse response decay method (IRDM). The free vibration of magnesium alloy sheet was excited by a pulse excitation, and the sound pressure near the magnesium alloy sheet was measured. The radiated sound pressure due to one normal vibration mode or the complex sound pressure due to few normal vibration modes in one frequency band was isolated by a band-pass filter from the measured sound pressure signals. The damping loss factor (DLF) of the magnesium alloy was obtained by the slope of the polynomial fitting curve for the sound pressure signal, and compared with that of steel. The results showed that the DLF of magnesium alloy decreases with the increase of frequency. Many damping peaks appear at 660, 1 090, 1 230 and 1 760 Hz, which are most suitable for the vibration reduction. In the low-mid frequency range, the damping capacity of magnesium alloy is 2 to 3 times higher than steel's. Therefore, magnesium alloy components will show excellent shock absorption, vibration damping and noise reduction performance.

Key words: magnesium alloy    impulse response decay method    sound pressure signal    damping
出版日期: 2010-02-04
:  TG146.22  
基金资助:

“十一五”国家科技支撑计划重点资助项目(2006BA104B04-2);国家自然科学基金资助项目(10672141).

通讯作者: 郝志勇,男,教授,博导.     E-mail: haozy@zju.edu.cn
作者简介: 陈馨蕊(1984-),女,河北石家庄人,博士生,主要从事汽车振动与噪声控制研究.
服务  
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章  
陈馨蕊
郝志勇
杨陈

引用本文:

陈馨蕊, 郝志勇, 杨陈. 镁合金AZ31阻尼性能的实验研究[J]. J4, 2010, 44(1): 19-22.

CHEN Xin-Juan, HAO Zhi-Yong, YANG Chen. Experimental study on damping performance of magnesium alloy AZ31. J4, 2010, 44(1): 19-22.

链接本文:

http://www.zjujournals.com/xueshu/eng/CN/10.3785/j.issn.1008-973X.2010.01.004        http://www.zjujournals.com/xueshu/eng/CN/Y2010/V44/I1/19

[1] 刘楚明,纪仁峰,周海涛,等. 镁及镁合金阻尼特性的研究进展[J]. 中国有色金属学报, 2005, 15(9): 1319-1325.
LIU Chu-ming, JI Ren-feng, ZHOU Hai-tao, et al. Research and development progress of damping capacity of magnesium and magnesium alloys [J]. The Chinese Journal of Nonferrous Metals, 2005, 15(9): 1319-1325.
[2] 訾炳涛,王辉. 镁合金及其在工业中的应用[J]. 稀有金属, 2004, 28(1): 229-232.
ZI Bing-tao, WANG Hui. Magnesium alloy and its applications in industry [J]. Chinese Journal of Rare Metals, 2004, 28(1): 229-232.
[3] 李晓敏. 压铸镁合金在汽车中的应用及其发展前景[J]. 世界有色金属, 2001(9): 16-18.
LI Xiao-min. The application in automobile of die-casting magnesium alloy and its developing prospect [J]. World Nonferrous Metals, 2001(9): 16-18.
[4] 张津,陶艳玲,孙智富,等. 镁合金AZ91D的阻尼减振性能[J]. 机械工程学报, 2006, 42(10): 186-189.
ZHANG Jin, TAO Yan-ling, SUN Zhi-fu, et al. Vibration damping capacity of AZ91D magnesium alloy [J]. Chinese Journal of Mechanical Engineering, 2006, 42(10): 186-189.
[5] BRANDON C B, MOHAN D R. Estimation of frequency-averaged loss factors by the power injection and the impulse decay methods [J]. Journal of Acoustical Society of America, 2004, 117(1): 240-249.
[6] 赵跃英,盛胜我. 薄壁构件的阻尼振动衰减因子的测量[J]. 同济大学学报, 2002, 30(7): 900-903.
ZHAO Yue-ying, SHENG Sheng-wo. Measurement of attenuation factor for damped vibration of thin-shell structures [J]. Journal of Tongji University, 2002, 30(7): 900-903.
[7] BOLDUC M, ATALLA N. Measurement of SEA damping loss factor for complex structures [J]. SAE, 2005-01-2327.
[8] 王济,胡晓. MATLAB在振动信号处理中的应用[M]. 北京:中国水利水电出版社, 2006: 69-82.

[1] 陈昭晖, 倪一清. 自传感磁流变阻尼器实时阻尼力跟踪控制[J]. 浙江大学学报(工学版), 2017, 51(8): 1551-1558.
[2] 胡成宝, 王云岗, 凌道盛. 瑞利阻尼物理本质及参数对动力响应的影响[J]. 浙江大学学报(工学版), 2017, 51(7): 1284-1290.
[3] 张捷, 肖新标, 王瑞乾, 金学松. 高速列车铝型材声振特性测试及等效建模[J]. 浙江大学学报(工学版), 2017, 51(3): 545-553.
[4] 倪楠楠, 温月芳, 贺德龙, 王程成, 益小苏, 许亚洪. 功能无纺布插层复合材料的结构阻尼性能[J]. 浙江大学学报(工学版), 2016, 50(2): 353-359.
[5] 张奔奔,胥芳,吴乐彬,艾青林. LCL型并网逆变器自适应谐振抑制[J]. 浙江大学学报(工学版), 2016, 50(1): 180-185.
[6] 庾焱秋,王奎华,吕述晖,徐礼阁. 传感器黏结剂对低应变测试曲线的影响[J]. 浙江大学学报(工学版), 2015, 49(9): 1725-1730.
[7] 李林, 顾临怡, 罗高生. 基于圆盘缝隙阻尼器的中心通流静压推力轴承[J]. 浙江大学学报(工学版), 2015, 49(2): 282-286.
[8] 王彤,王炎,谢旭,张鹤. 不等高桥墩铁路减隔震桥梁钢阻尼支座地震易损性[J]. 浙江大学学报(工学版), 2014, 48(11): 1909-1916.
[9] 黄海燕,谢旭,吴冬雁,王荣富,王渊. 预应力混凝土部分斜拉桥的阻尼特性[J]. J4, 2012, 46(5): 804-810.
[10] 王成立, 高慧, 卢建刚. 水轮发电机定子故障下的阻尼条损耗计算[J]. J4, 2012, 46(4): 770-776.
[11] 钟伟, 刘昊, 陶国良, 黎鑫, 香川利春. 多孔质气悬浮气膜压力特性建模及试验研究[J]. J4, 2012, 46(4): 616-621.
[12] 毛杰, 郝志勇, 卢兆刚, 陈馨蕊. 基于FE-SEA混合法的
汽车镁合金前围板隔声量数值计算
[J]. J4, 2012, 46(12): 2184-2188.
[13] 郭增伟,葛耀君,卢安平. 竖弯涡振控制的调谐质量阻尼器TMD参数优化设计[J]. J4, 2012, 46(1): 8-13.
[14] 林琼, 郝志勇, 刘宇恒. 金属材料干摩擦特性的实验与仿真研究[J]. J4, 2009, 43(8): 1501-1505.
[15] 熊熙程 魏建华 孔晓武. 气液混合型制动系统的试验研究[J]. J4, 2009, 43(3): 551-554.