基于敲击声振法检测叶片脱层的优化设计  

Optimization Design of Detecting Blade Delamination by Vibration Testing

作　　者：孙梁[1] 刘荣梅 

机构地区：[1]中航工业南京机电液压工程研究中心,江苏南京210016 [2]南京航空航天大学自动化学院,江苏南京210016

出　　处：《计算机仿真》2018年第2期354-359,共6页Computer Simulation

基　　金：国家科技支撑项目计划(2012BAA01B02)

摘　　要：脱层是风力叶片损伤的主要形式,若叶片内部有脱层,缺陷处的刚度会下降,在应用敲击声振法检测的时候,敲击应力持续时间将增加。依据此理论,采用有限元软件ANSYS LS-DYNA来模拟整个敲击过程,并用MATLAB软件对仿真结果进行了数据处理,得出敲击法测试叶片脱层的最大可测深度。为提高探测范围,通过研究碰撞参数对能量辐射系数的影响来优化敲击方案,经实际证明优化后的敲击方案够明显提高脱层最大检测深度。Delamination is the main damage form of wind blade, and when delaminates are appeared, the stiff ness of defects is decreased and the duration of tap stress is increased during detection. Based on this principle, the research used dynamic simulation module LS - DYNA of the finite element sot^tware ANSYS to simulate the whole process of collision,the simulation results were processed based on MATLAB. In order to improve the detection range, the influence of impact parameters on energy radiation coefficient was studied to optimize the percussion meth- od. It was proved by practice that the optimized impact scheme can significantly improve the maximum depth of de- tection.

关 键 词：脱层 声振法 碰撞参数 能量辐射系数 检测系统 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术] TP391.9[自动化与计算机技术—计算机科学与技术]