欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
提出了一种基于小波熵的波纹管超声无损检测方法,通过对回波信号进行小波熵技术处理和对熵值的不同来判断波纹管压浆相对密实程度.利用有限元进行了理论模拟仿真,研究了声场,通过仿真数据进行熵分析,结果表明,缺陷处的小波熵值较小,且缺陷越大熵值越小.通过实际制作模型并测量,得到了与仿真一致的结果.
英文摘要：
We proposed a nondestructive test for corrugated pipe based on wavelet entropy technology. The grouting compactness is estimated by wavelet entropy through processing of the impact echo signals. The sound field propagation in corrugated pipe structure is simulated and analyzed by using finite element method, and the simula tion results demonstrate the complex wave propagation characteristic in this structure, the scattering signals caused by grouting defect are hardly to be distinguished. The collected impact-echo signals are processed by signal process- ing of wavelet entropy. It is found the defect size is directly related to the information entropy. Several modes are constructed and measured, and the results are consistent with simulated prediction.
同期刊论文项目
同项目期刊论文
期刊信息
位置：