摘要
冲击载荷的测量,通常采用在冲击头上安装测力传感器直接测量,或在被撞击的结构上安装加速度传感器测其冲击响应,识别其冲击力,但对很多复杂工况或特殊结构,上述方法的应用受到限制.该文利用电阻应变片测量结构对冲击的应变响应,通过傅氏变换及数据处理识别其冲击载荷.此方法的优点在于电阻应变片的质量小,尺寸小,价格便宜,便于粘贴,而且不影响结构的动态特性.对当量载荷问题也进行了研究。
The impulse load is usually measured by either of two methods viz . either directly with a transducer attached to the impact end , or by measuring the response on an acceleration transducer fixed on the impacted structure . The applications of these methods are often restricted in many complex circumstances or specific structures . In this paper , the impulse load is identified from the strain response and then processed by fast - Fourier - transform (FFT) and data processing , and the strain response is measured with strain gages under the load . Use of strain gages in evaluating the impulse load has the advantage as strain gages are tiny in size , light , low in price , easily attached and not in anyway aflecting the structure' s dynamic behavior . The problem of the equivalent load is also discussed .
出处
《北京理工大学学报》
EI
CAS
CSCD
1991年第3期86-91,共6页
Transactions of Beijing Institute of Technology
