基于ANSYS LS-DYNA模拟敲击声振法检测叶片脱层  

Simulation of detecting blade delamination by vibration testing based on ANSYS LS-DYNA

作　　者：孙梁[1] 刘荣梅[1] 姚恩涛[2] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016 [2]南京航空航天大学自动化学院,南京210016

出　　处：《国外电子测量技术》2014年第12期65-68,81,共5页Foreign Electronic Measurement Technology

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中的动力学仿真模块LS-DYNA来模拟整个敲击过程。得出敲击有脱层与无脱层试件表面,应力持续时间不同;并且随着脱层深度变大,应力持续时间将减小,当深度达到一定值时,应力持续时间基本不发生改变且接近于敲击无缺陷处,从而得出脱层可被测得的最大深度。最后将结果与实验进行对比,验证了模拟的可行性。Delamination is the main damage form of wind blade, when delaminates are appeared, the stiffness of defects is decreased and the duration of tap stress is increased during detection. Based on this principle, the research uses dynamic simulation module LS-DYNA of the finite element software ANSYS to simulate the whole process of collision. It is concluded that the duration of stress is different when wetapping on a surface of the specimen with defects and without defects; as depth of delamination becomes large, the duration of the stress reduces; the duration of the stress does not substantially change and close to no defects＇ when the depth reach certain value which is the maximum depth can be measured. Finally, the comparison with the experimental results verifies the feasibility of the simulation.

关 键 词：脱层 声振法 应力持续时间 动力学仿真 

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]