Scattering of SH waves by a scalene triangular hill with a shallow cavity in half-space

作     者：Sun Yingchao Yang Zailin Yang Yong Wang Guangyi Sun Yingchao;Yang Zailin;Yang Yong;Wang Guangyi

作者机构：College of Aerospace and Civil EngineeringHarbin Engineering UniversityHarbin 150001China AVIC-HONGDUNanchang 330024China Key Laboratory of Advanced Material of Ship and MechanicsMinistry of Industry and Information TechnologyHarbin Engineering UniversityHarbin 150001China Engineering Research Institute of Appraisal and StrengtheningShandong Jianzhu UniversityJinan 250101China Jiangxi Technology Innovation Center of Advanced Aviation Structure and System IntegrationNanchang 330024China 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2022年第21卷第4期

页      面：877-897页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：National Natural Science Foundation of China under Grant No. 12072085 Research Team Project of Heilongjiang Natural Science Foundation under Grant No. TD2020A001 the Opening Fund of Acoustics Science and Technology Laboratory under Grant No. SSKF2020011 the Fundamental Research Funds for the Central Universities under Grant No. 3072021CF0206 the program for Innovative Research Team in China Earthquake Administration 

主　　题：earthquake ground motions theoretical seismology wave scattering and diffraction wave propagation 

摘      要：In this study,a theoretical approach is used to investigate the scattering problem of circular holes under a scalene triangle on the *** wave displacement function is obtained by solving the Helmholtz equation that meets the zero-stress boundary conditions by adopting the method of separation of *** on the complex function,multi-polar coordinate method,and region-matching technique,algebraic equations are established at auxiliary boundaries and free boundaries conditions in a complex *** auxiliary circle is used to solve the singularity of the reflex angle at the triangle ***,according to sample statistics,the least squares method is used instead of the Fourier expansion method to solve the undetermined coefficient of the algebraic equations by discrete *** results show that the continuity of the auxiliary boundaries and the accuracy of the zero-stress boundaries are adequate,and the displacement of the free surface and the stress of the circular hole are related to the shape of the triangle,the position of the circular hole,the direction of the incident wave,and the frequency content of the ***,time-domain responses are calculated by FFT based on the frequency domain theory,and the results reveal the wave propagation mechanism in a complicated structure.