Yongshun Chen's research while affiliated with Northwestern Polytechnical University and other places
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Publications (10)
To develop the full application potential of composite materials, research on the post-buckling behavior of composite stiffened panels is of great significance. In this paper, the impact and compression after impact (CAI) behaviors of four different types of composite stiffened panels were studied by numerical simulation and experimental methods. T...
We present a novel eikonal tomography approach using physics‐informed neural networks (PINNs) for Rayleigh wave phase velocities based on the eikonal equation. The PINN eikonal tomography (pinnET) neural network utilizes deep neural networks as universal function approximators and extracts traveltimes and velocities of the medium during the optimiz...
On 21 May 2021 a magnitude Mw 6.1 earthquake occurred in Yangbi region, Yunan, China, which was widely felt and caused heavy casualties. Imaging of the source region was conducted using our improved double-difference tomography method on the huge data set recorded by 107 temporary stations of ChinArray-I and 62 permanent stations. Pronounced struct...
Detailed crustal structure of large earthquake source regions is of great significance for understanding the earthquake generation mechanism. Numerous large earthquakes have occurred in the NE Tibetan Plateau, including the 1920 Haiyuan M8.5 and 1927 Gulang M8 earthquakes. In this paper, we obtained a high-resolution three-dimensional crustal veloc...
Plain Language Summary
It has long been suggested that the recent growth of northeastern Tibet since the Miocene is the consequence of the thickening and shortening of crust rather than the entire lithosphere. Here we used P and S receiver functions to image the crustal and lithospheric mantle structures across the northeastern margin of the Tibeta...
Citations
... The paper offers insights into the behavior of composite structures under compression, with implications for design methodologies and structural integrity. Wang et al. [8] present a detailed analysis of buckling and post-buckling phenomena in a composite wing box subjected to loads with torsion-bending coupling. The study explores the complex interactions in large-scale structures, providing crucial insights for design considerations. ...
... In conclusion, summing up, it is necessary to pay attention to the practical significance and prospects for the development of the presented research. Since the energy criteria, including the differential energy criterion of destruction [45], used as the basis of this work, belong to fairly universal criteria, the methodology of the presented study can be adapted to the analysis of the mechanical behavior of not only wooden structures [45], but also composite materials [60][61][62], structures [63,64] and bone [65] under other types of loads in future research. ...
... During the past decade, DNNs have been widely used in various geophysical research areas (1)(2)(3)(4)(5), including seismology (6)(7)(8)(9)(10)(11)(12)(13)(14), atmospheric science (15)(16)(17), and planetary and space science (18)(19)(20). DNNs have been particularly intensively studied in exploration of geophysics to accelerate and advance the entire workflow of data processing (21)(22)(23)(24), tomography (25)(26)(27)(28)(29), forward modeling (30)(31)(32)(33)(34)(35), migration (36)(37)(38)(39)(40), velocity model building (41)(42)(43)(44)(45)(46)(47), and interpretation (48)(49)(50)(51)(52)(53). ...
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... Together with migrating foreshock behaviors, they argued that a combination of cascade triggering and pre-slip can best explain the observations. Finally, based on observations of tidal modulations of foreshocks and seismic imaging of a high Vp/Vs body below the source area, Lei et al. (2021) and Sun et al. (2022) inferred that upwelling of deep fluids may be the driving force for the Yangbi foreshock sequence. ...
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... The 3D P and S-wave velocity structures are inverted using the double-difference seismic tomography method (tomoDD) (Zhang and Thurber 2003), which has been extensively applied in previous studies (Allam and Ben-Zion 2012;Feng et al. 2022;Sun et al. 2021;Wu and Ma 2022;Xin et al. 2018;Zhang et al. 2004). The initial velocity model we construct refers to the seismic reference model proposed by Cui et al. (2021) and He et al. (2021) as it serves as a crucial input for the inversion of the 3D velocity structure ( Fig. 3 a and b). ...
... Occasionally, large-scale events in the upper mantle are not accompanied with material input from other parts of the lithosphere. Lithospheric mantle thinning and delamination (e.g., Gîrbacea and Frisch, 1998;Liu et al., 2019), as well as thickening (e.g., Zhang et al., 2020), are such known phenomena. ...
