%0 Journal Article
%T 90&#186弯曲相交界面超声导波传播特性研究<br>The Characteristics of Guided Wave Propagation on 90&#186 Curved Intersection Interface
%A 贾静
%A 易佳希
%J Applied Physics
%P 391-398
%@ 2160-7575
%D 2020
%I Hans Publishing
%R 10.12677/APP.2020.109052
%X 复杂形状的构件在航空航天工业中广泛应用于加固结构中，保障飞机的飞行安全。本文主要研究了导波在90？弯曲相交界面传播的特性。基于热弹性理论，建立激光作用于弯曲相交界面，激发产生导波的理论模型。热源辐照点附近温升最高为20 K，确保导波的热弹性激发。点源激光激发声波同时沿弯曲脊方向和侧表面传播。随着脊背上采样点远离激光加载区，声波起震时间越晚，并且在传播过程中峰值基本无衰减，即脊上声波能量不损失。沿侧面传播的声波呈圆形向外传播，逐渐衰减。此研究可用于弯曲相交复杂形状构件的检测与评估。<br />
Complex shaped components are widely used in the aerospace industry to strengthen the structure and ensure the flight safety of aircraft. In this paper, the propagation characteristics of guided waves on the curved intersection interface are studied. Based on the thermoelastic theory, a theoretical model of laser illuminated on curved intersecting spine is established. The temperature rise area is mainly near the heat source, and the maximum rise of temperature is 20 K, which ensures the thermoelastic excitation of guided waves. The guided wave propagates along the direction of curved ridge and side surface. As the detected point on the spine is away from the laser loading area, the acoustic wave initiation time is later, and the peak value has no attenuation during propagation, that is, the acoustic wave energy on the ridge is no lost. This research can be used for the detection and evaluation of curved intersecting complex shape components.
%K 弯曲相交，导波，能量<br>Bending Intersection
%K Guided Wave
%K Energy
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=37613