【摘要】 首先根据弹性波波动理论推导了冲击回波方法的基本原理,通过对混凝土模型与混凝土楼板的测试实验,进行了超声冲击回波法在几种激发方式下的记录峰频变化及厚度测试结果的分析.结果表明:在文中采用的激发条件下,冲击回波法的应用效果还不够稳定,最后讨论了激发方式与测试对象等影响因素,提出完善该方法的研究方向.更多还原

【Abstract】 This paper discussed the rationale of impact-echo method with the theory of wave propagation.By means of testing the concrete model and the highway concrete model,we studied the variations of the peak frequency and thickness-testing results at different impacts.The result proves that applied effect of impact-echo method is of much limit on the condition of ordinary impact ways.Otherwise,the impact ways and test object are important influence of the result.We also discussed the development tendency to this method and its limitation.更多还原