[1]刘新红,周超杰,张磊..Al2O3-SiC-SiAlON复合材料的制备和性能[J].郑州大学学报(工学版),2012,33(01):46-50.[doi:10.3969/j.issn.1671-6833.2012.01.012]
　LIU Xinhong,ZHOU Chaojie,ZHANG Lei.Preparation and Properties of Al2O3-SiC-SiAlON Composites[J].Journal of Zhengzhou University (Engineering Science),2012,33(01):46-50.[doi:10.3969/j.issn.1671-6833.2012.01.012]
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Al2O3-SiC-SiAlON复合材料的制备和性能()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
33卷
期数:
2012年01期
页码:
46-50
栏目:
出版日期:
2012-01-10

文章信息/Info

Title:
Preparation and Properties of Al2O3-SiC-SiAlON Composites
作者:
刘新红; 周超杰; 张磊.
郑州大学高温材料研究所,河南郑州,450052, 郑州大学高温材料研究所,河南郑州,450052, 郑州大学高温材料研究所,河南郑州,450052
Author(s):
LIU Xinhong; ZHOU Chaojie; ZHANG Lei
High Tempernture Cermies Institute, Zhengzhou University,Zhengzhou, 450052 China
关键词:
Al2O3-SiC-SiAlON复合材料;  SiC;  β-SiAlON;  高温机械性能;  显微结构
Keywords:
long-span roofs;  wind-induced vibration control;  genetic algorithm;  ATMD;  active control
分类号:
TQ175.1
DOI:
10.3969/j.issn.1671-6833.2012.01.012
摘要:
以电熔白刚玉、u -Al2O3微粉、Si粉和矾土基β-SiAlON粉为原料,以树脂为结合剂,制备了复合材料试样.研究了1 500℃烧后试样的物相组成、显微结构以及常温物理性能、高温抗折强度和抗热震性.结果表明:(1)在刚玉中引入适量Si粉高温埋碳条件下可合成Al2O3 -SiC-SiAlON复合材料,引入适量β-SiAlON可促进Si反应,且复合材料1 500℃烧结良好；(2)复合材料的高温抗折强度和抗热震性随Si粉加入量增加而提高,加入β-SiAlON后材料的高温机械性能进一步提高；(3)材料高温机械性能提高的原因在于Si粉在高温下与C、CO和N2反应生成晶须状或纤维状SiC和絮状O2- SiAlON填充气孔,形成交叉连锁的网络结构,对材料起增强和增韧作用.
Abstract:
A genetic algorithm based control design is proposed to control wind-induced vibration of long-spanroof in this study, An active tuned mass damper ( A’TMD) controller is designed using the proposed methodolo.gy. Wind-induced control theory is presented firstly, The root mean square of displacement and accelerationresponses are used as the evaluation criteria of control elcieney, Then procedures for control of wind-inducedvibration of long-span roofs based on genetic algorithms are given, Finally the method is applied to the controlof wind-induced responses of a long-span roof. The root mean square of displacement and acceleration responses is caleulated for some typical measuring points, And the results are compared with those obtained from other conlroller, The overall results of GA-based coniroller are accurate and efficient. The root mean square val.ues of displacement and acceleration of the sample points are reduced by 53,8% and 44.6% on average, respectively, GA-based controller reduces peak vertical displacement and acceleration of all sample points by65.7% and 56. 2%6 on average, respectively, GA-based control design methodology can obviously reducewind-induced vibration of long-span roofs, As an accurate and effective tool in wind-induced vibration control,the proposed method can provides some references for practical projects.
更新日期/Last Update: 1900-01-01