Search | Engineering

Subscribe Submit

Home Journals Focus Achievement Fronts About Us 中文版

Resource Type

Journal Article 5

Conference Videos 1

Year

2022 2

2020 2

2019 1

Keywords

Addition theorem 1

Composite object 1

Integral equation 1

Iterative method 1

Lyapunov function 1

Method of moments (MoM) 1

Residual energy function 1

Rosenblatt transformation 1

Stability of dissipative gyroscopic system 1

axial loads 1

bending moments 1

bending stiffness 1

deflection 1

discontinuous beam 1

excavation 1

extended Gauss integration 1

extended sparse grid 1

gyroscopic moments 1

high-order moments analysis 1

open ︾

Search scope:

排序： Display mode:

Bending and vibration of a discontinuous beam with a curvic coupling under different axial forces

Heng LIU, Jie HONG, Dayi ZHANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3, Pages 417-429 doi: 10.1007/s11465-019-0584-4

Abstract: The differential equations for the beam that consider moments of inertia, shearing effects, and gyroscopicmoments are investigated using the transfer matrix method.

Keywords： discontinuous beam bending stiffness transverse vibration axial loads gyroscopic moments

HTML PDF Collect

Improved prediction of pile bending moment and deflection due to adjacent braced excavation

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0961-2

Abstract: Deep excavations in dense urban areas have caused damage to nearby existing structures in numerous past construction cases. Proper assessment is crucial in the initial design stages. This study develops equations to predict the existing pile bending moment and deflection produced by adjacent braced excavations. Influential parameters (i.e., the excavation geometry, diaphragm wall thickness, pile geometry, strength and small-strain stiffness of the soil, and soft clay thickness) were considered and employed in the developed equations. It is practically unfeasible to obtain measurement data; hence, artificial data for the bending moment and deflection of existing piles were produced from well-calibrated numerical analyses of hypothetical cases, using the three-dimensional finite element method. The developed equations were established through a multiple linear regression analysis of the artificial data, using the transformation technique. In addition, the three-dimensional nature of the excavation work was characterized by considering the excavation corner effect, using the plane strain ratio parameter. The estimation results of the developed equations can provide satisfactory pile bending moment and deflection data and are more accurate than those found in previous studies.

Keywords： pile responses excavation prediction deflection bending moments

HTML PDF Collect

Construction of a new Lyapunov function for a dissipative gyroscopic system using the residual energy Personal View

Cem CİVELEK, Özge CİHANBEĞENDİ

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 4, Pages 629-634 doi: 10.1631/FITEE.1900014

Abstract: In a dissipative gyroscopic system with four degrees of freedom and tensorial variables in contravariant

Keywords： Lyapunov function Residual energy function Stability of dissipative gyroscopic system

HTML PDF Collect

Enhanced solution to the surface–volume–surface EFIE for arbitrary metal–dielectric composite objects Research Article

Han WANG, Mingjie PANG, Hai LIN

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 7, Pages 1098-1109 doi: 10.1631/FITEE.2100387

Abstract: The surface–volume–surface electric field (SVS-EFIE) can lead to complex equations, laborious implementation, and unacceptable computational complexity in the . Therefore, a general matrix equation (GME) is proposed for electromagnetic scattering from arbitrary metal–dielectric s, and its enhanced solution is presented in this paper. In previous works, MoM solution formulation of SVS-EFIE considering only three-region metal–dielectric composite scatters was presented, and the two-stage process resulted in two integral operators in SVS-EFIE, which is arduous to implement and is incapable of reducing computational complexity. To address these difficulties, GME, which is versatile for homogeneous objects and s consisting of more than three sub-regions, is proposed for the first time. Accelerated solving policies are proposed for GME based on coupling degree concerning the spacing between sub-regions, and the coupling degree standard can be adaptively set to balance the accuracy and efficiency. In this paper, the reformed is applied for the strong coupling case, and the is presented for the weak coupling case. Parallelism can be easily applied in the enhanced solution. Numerical results demonstrate that the proposed method requires only 11.6% memory and 11.8% CPU time on average compared to the previous direct solution.

Keywords： Composite object Integral equation Method of moments (MoM) Addition theorem Iterative method

HTML PDF Collect

Uncertainty propagation analysis by an extended sparse grid technique

X. Y. JIA, C. JIANG, C. M. FU, B. Y. NI, C. S. WANG, M. H. PING

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 1, Pages 33-46 doi: 10.1007/s11465-018-0514-x

Abstract: technique and maximum entropy principle, aiming at improving the solving accuracy of the high-order momentsSubsequently, within the sparse grid numerical integration framework, the statistical moments of theFurthermore, based on the maximum entropy principle, the obtained first four-order statistical moments

Keywords： sparse grid maximum entropy principle extended Gauss integration Rosenblatt transformation high-order moments