A seepage model based on smoothed particle hydrodynamics (SPH) was developed for the simulation of pore water in porous rock mass media. Then, effectiveness proved by a two-dimensional benchmark example. Under framework SPH total Lagrangian formula, an extended hydro-mechanical coupling (EHM-TLF-SPH) proposed to simulate crack propagation and coalescence process samples with prefabricated flaws under hydraulic compressive loads. In program, kernel used approximate equations motion particles....

The vortex-induced vibration is one of the most important factors to make engineering failure in wind engineering. This paper focuses on suppression method that occurs a circular cylinder fitted with vortex generators, based tunnel experiment. effect generators presented comparisons including bare cylinder. experimental results reveal can efficiently suppress Vortex generator control boundary layer profile fuller and hence more resistant separation. selections skew angles angular position...

Abstract Spars are considered to have excellent motion characteristics in wave environments. However, they susceptible vortex-induced motions (VIM), where can exhibit significant in-line and transverse under current conditions. Such implications for the fatigue life of risers attached Spars. Due potential impact VIM on riser life, it is imperative that this issue be properly addressed design analysis. Furthermore, higher degree uncertainty inherent prediction Spar (compared similar...

When performing flutter analysis through the traditional methods, it is difficult to solve high‐order strong nonlinear equations. For overcoming this difficulty, paper establishes a double‐parameter optimization model for searching critical wind speed and frequency. A new hybrid firefly algorithm called quantum genetic presented search optimal solution model. The proposed combination of algorithm. results are compared with shown by Numerical experimental competitive in most cases better than that

To address the problems of details blurring and color distortion existing in multi-angle underwater polarized images, paper proposes a restoration algorithm images based on DCP(dark channel prior), which combines characteristics with DCP. Firstly, transmittance object reflected light polarization two Orthogonal are calculated by improved Then, components lights eliminated global angle to obtain original radiance. Finally, correction is carried out gray world get final result. The proposed...

The intelligent technique is becoming the most important and powerful aided tool to manage infrastructure information reduce urban natural hazards. This paper presents development in building smart digital China programs application of mitigate hazard Chinese cities. techniques this mean "3S" technique, which geographical system (GIS), globe positioning (GPS) remote sensing (RS). As one popular tools, 3S applied these systems for management reduction. So far, cities have built their own...

Detached Eddy Simulation（DES）is quite a new approach for the treatment of turbulence, which unites efficiency Reynolds Averaged Navier-Stokes Simulation (RANS) and accuracy Large (LES) into one framework. In this paper, DES method based on Spalart-Allmaras (S-A) turbulence model is employed to simulate incompressible viscous flow around bridge decks. order obtain aerodynamic forces, forced motion simulations decks are implemented by self-developed codes combined with FLUENT software. After...

The cumulative data by bridge management system (BMS) is helpful for decision making maintenance measure. According to the current state of municipal bridges, design development Sihui BMS (SH-BMS) discussed in this paper. network based on browser/server (B/S) paradigm presented and major operational functions integrated four modules with flowchart operation are proposed herein. Then, selection principle database Microsoft SQL sever employed database. requirements system, 12 tables built...

For large-diameter, cast-in-place concrete piles, the end bearing capacity of a single pile is affected by discontinuous surfaces that exist in natural rock masses when layer located layer. In order to study influence jointed dip angle on characteristics end, discrete element models are adopted simulate mechanical masses, and model tests failure mode were also designed. The results numerical calculations modeling show joints, which have filtering effect internal stress bedrock at change load...

The startup of new agricultural science projects in China provides the development opportunities for universities and their specialty as well course reforms.Because serious shortage chemical knowledge courses environmental, geotechnical ecological protection related to rural infrastructure civil engineering science, this paper systematically analyzes optimizes contents, frame structures basic engineering.After years teaching practice, curriculum reform has greatly improved application design...