摘要
针对导波在锚杆检测中的应用,分析了纵向导波在锚杆中的传播特性,利用Matlab求解了纵向导波传播的频散方程,用有限元数值方法模拟了不同频率的L(0,1)模态导波在锚杆中的传播特性,并对其杆顶响应信号进行了分析。通过理论和数值模拟分析对比验证了数值模拟方法的可行性,对于工程中应用导波对锚杆进行检测时,应选择适当频率的导波,并结合各频率导波在锚杆中的传播特性才能得到可靠的结果,进而对锚杆顶端对称与非对称激励震源在锚杆顶端产生的响应进行了分析。
For the guided waves in anchor bolt detection applications,the propagation characteristics of the longitudinal guided wave in the anchor bolt are investigated.The dispersion equation of longitudinal guided wave is constructed and solved by Matlab.The propagation characteristics of L（0,1）mode guided waves at different frequencies in anchor bolt are simulated by the finite element numerical method,and the response signal at the top of the bolt is analyzed.Through the comparison of theoretical analysis and numerical simulation,the feasibility of numerical simulation method is verified.The engineering application of guided waves in detection of anchor bolt needs appropriate frequency guided waves,and the corresponding propagation characteristics of the waves should be combined to get reliable results.Finally the responses at the top of the bolt caused by symmetric and asymmetric incentive are analyzed.
出处
《河北科技大学学报》
CAS
2013年第5期464-470,共7页
Journal of Hebei University of Science and Technology
基金
国家自然科学基金(51274144)
关键词
导波
锚杆
频散特性
数值模拟
guided wave
anchor bolt
dispersion characteristics
numerical simulation
