Author
Gao Lin
Bio: Gao Lin is an academic researcher from Dalian University of Technology. The author has contributed to research in topics: Finite element method & Boundary (topology). The author has an hindex of 17, co-authored 104 publications receiving 1057 citations.
Papers published on a yearly basis
Papers
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TL;DR: A simple approach to integration of the acceleration to acquire a realistic displacement–time series by firstly baseline-corrected in the time domain using the least-square curve fitting technique, and then processed in the frequency domain using a windowed filter to further remove the components that cause long-period oscillations in the derived displacement.
127 citations
TL;DR: In this paper, a semi-analytical model for the evaluation of dynamic impedance of rigid surface footing bonded to multi-layered subsoil is proposed, which is based on the dual vector form of wave motion equation and Green's influence function of subdisk for horizontally layered half-space.
74 citations
TL;DR: The scaled boundary finite element method (SBFEM) is a semi-analytical technique, combining the advantages of the finite element and the boundary element methods with unique properties of its own as discussed by the authors.
Abstract: The scaled boundary finite element method (SBFEM) is a novel semi-analytical technique, combining the advantages of the finite element and the boundary element methods with unique properties of its own. In this paper, the SBFEM is firstly extended to solve electrostatic problems. Two new SBFE coordination systems are introduced. Based on Laplace equation of electrostatic field, the derivations (based on a new variational principle formulation) and solutions of SBFEM equations for both bounded domain and unbounded domain problems are expressed in details, the solution for the inclusion of prescribed potential along the side-faces of bounded domain is also presented in details, then the total charges on the side-faces can be semi-analytically solved, and a particular solution for the potential field in unbounded domain satisfying the constant external field is solved. The accuracy and efficiency of the method are illustrated by numerical examples with complicated field domains, potential singularities, inhomogeneous media and open boundaries. In comparison with analytic solution method and other numerical methods, the results show that the present method has strong ability to resolve singularity problems analytically by choosing the scaling centre at the singular point, has the inherent advantage of solving the open boundary problems without truncation boundary condition, has efficient application to the problems with inhomogeneous media by placing the scaling centre in the bi-material interfaces, and produces more accurate solution than conventional numerical methods with far less number of degrees of freedom. The method in electromagnetic field calculation can have broad application prospects.
59 citations
TL;DR: In this paper, the authors extended the semi-analytical scaled boundary finite element method to deal with the short-crested waves interaction with a surface-piercing concentric cylindrical structure, which consists of a solid inner cylinder and a coaxial double-layered perforated wall.
58 citations
TL;DR: In this paper, the failure process of high concrete dams subjected to strong earthquakes is modeled using the Rock Failure Process Analysis (RFPA) with successful applications to failure modeling of rock and concrete specimens mainly subjected to static loading.
54 citations
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Proceedings Article•
01 Jan 1998TL;DR: In this paper, the LCH-CONF-1998-009 Record created on 2007-04-24, modified on 2016-08-08, was used as a reference.
Abstract: Note: [255] Reference LCH-CONF-1998-009 Record created on 2007-04-24, modified on 2016-08-08
238 citations
TL;DR: In this article, signal analysis techniques (supervised-type learning filter in combination with a Chebyshev filter) constrained and tested by independent accelerometer data were used to process noisy GPS measurements of oscillations of 40 m long steel footbridge excited by coordinated jumps of a group of people.
211 citations
TL;DR: A mixed filtering approach is proposed for stable displacement estimation and waveband classification of the irregularities in the measured acceleration of railway tracks using acceleration data measured from high-speed trains.
Abstract: This paper describes a method of estimating irregularities in railway tracks using acceleration data measured from high-speed trains. Track irregularities are the main causes of the vibration of high-speed trains and thus should be carefully monitored to maintain the stability and ride quality of the trains. A mixed filtering approach is proposed for stable displacement estimation and waveband classification of the irregularities in the measured acceleration. Accelerometers are mounted on the axle box and the bogie of a high-speed train to measure the acceleration in the lateral and vertical directions. The estimated results are compared with those of a commercial track geometry measurement system. Finally, the performance of the proposed approach and the relationship between the mounted location of the accelerometers and the estimated track irregularities are discussed.
127 citations
TL;DR: In this article, the development and application of the scaled boundary finite element method for fracture analysis is reviewed, with the only limitation that the whole boundary is directly visible from the scaling centre.
120 citations