| 吴振强*,张正平,李海波,孔凡金,刘宝瑞.C/SiC壁板热噪声复合环境动态响应试验研究[J].实验力学,2015,30(6):741~748 |
| C/SiC壁板热噪声复合环境动态响应试验研究 |
| Experimental Investigation on C/SiC plate Dynamic Response in a Thermal and Acoustic Combined Environment |
| 投稿时间：2014-12-10 修订日期：2015-04-29 |
| DOI：10.7520/1001-4888-14-254 |
| 中文关键词: C/SiC壁板 热环境 噪声环境 加速度响应 试验研究 |
| 英文关键词:C/SiC plate thermal environment acoustic environment acceleration response experimental investigation |
| 基金项目:国家重大基础研究项目、国家自然科学基金（11172046）和重点实验室基金（XXC93005）资助 |
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| 中文摘要: |
| 高温复合材料壁板是高超声速飞行器热防护系统的重要组成部件,飞行中面临严酷的气动热、气动力、噪声等复合环境,严重影响结构的完整性和耐久性。基于自行研制的热噪声试验系统,选取典型C/SiC壁板结构为试验件,开展温度为200~600℃、噪声为156~165dB的热噪声动态响应试验研究,初步形成了高温复合材料壁板热噪声动态响应的试验方法。结果显示,热噪声环境导致试件加速度均方根值发生变化,加速度响应峰位置向高频偏移。上述结果可为热防护系统设计及抗噪声性能验证提供技术支撑。 |
| 英文摘要: |
| High temperature composite plate is a major structural component of thermal protection system on hypersonic vehicles. In flight, it is exposed to a severe combined environment of aerodynamic force, aerodynamic heat and acoustic. So its performance seriously affects the structural integrity and durability. Thermal acoustic dynamic response experimental study with temperature ranged from 200℃ to 600℃ and acoustic intesity ranged from 156dB to 165dB was carried out, based on a home-made experimental system and typical C/SiC plate structure. At the same time, a thermal acoustic dynamic response experimental method for high temperature composite plate was formed preliminarily. Results show that thermal acoustic environment results in the change of specimen acceleration root mean square value and the high frequency offset of response peak position. Above results may provide support for thermal protection system design and anti-acoustic evaluation. |
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