Abstract: RE is the generic name of a series of technical methods that convert physical parts into
engineering concepts and CAD model. It has been an important branch of modern design
methodology. With the development of computer and graphic design, RE has already no longer met
the simple imitation products, but product innovation based on physical parts. In order to redesign the
CAD model constructed by RE method and then support product innovation, hybrid CAD modeling
method and some related key techniques are studied in this paper. Combining conventional design
and RE, Hybrid CAD modeling method extracts features, constraints, and design intent from
measured data for parametric redesign and eventually completes CAD model.
Abstract: The algorithm to obtain intersecting lines from section and equidistance surface is one
method of resolving the problem of obtaining NC machining procedure from points cloud data. As far
as cutter paths obtained by section method are concerned, if intersecting lines using tangent plane and
processed curved surface are obtained directly, it will be a quite complicated process and lead to
divergent iteration operation because of inconsiderate design algorithm, and therefore it leads to the
failure of obtaining intersecting lines. So the method of obtaining intersecting lines from section and
equidistance surface is adopted. And this paper put forward and has realized one new algorithm. The
calculation is simple and the algorithm is stable. It avoids the interference of cutting tool paths.
Abstract: The study has been carried out in the framework of heart perfusion. The myocardium is
usually irrigated by two coronary arteries, the entries of which are located in the Valsalva sinuses of
the aortic root, slightly above the open leaflets of the aortic valve. The present investigation is aimed
at determining a representative model of the thoracic aorta, especially of its ascending segment with
the aortic valve and the coronary arteries, as well as the aortic arch, which commonly gives rise to
three main branches irrigating the upper body parts, and the descending aorta. The model is developed
using a CAD software and then meshed. Finally, steady flow simulations are performed using the
CFD solver Fluent.
Abstract: Three different kinds of abode wall and composite abode wall in thickness are calculated
with elastic-plastic FEM. Lateral resistance capacities, crack shapes as well as ductility of abode
wall,of composite wall are analyzed. Based on them, simplified formula is put forward for
calculating the lateral resistance capacities of composites abode wall, which provides a basis for the
design of composite abode wall. In addition, seismic effects of composites abode wall under
different earthquake levels,i.e:frequent intensity, basic and rare intensity are estimated. It indicates
that traditional abode wall with timber columns and beams can satisfy the criterion of rare
earthquake for seismic zone 9. It also shows that the research can be used as the provision for the
transformation and seismic reinforcement of traditional residential buildings in Xinjiang.
Abstract: This article presents the gear modeling method in dynamic mechanical analysis using
SPH (Smoothed Particle Hydrodynamics) analysis method. The parameter equations of the
transition curve of gear root and the other parts of gear are decided. The 3D discrete particles model
is established based on the parameter equations. The SPH pre-process program of global and local
dividing is developed. The error between the divided discrete particles and theoretical profiles of
the gear has been analyzed. The analysis results show that this modeling method is a relatively
better method and the correct SPH discrete particles can be divided by this method.
Abstract: The research about seepage of RSA is little, but the material is familiar. There are many
difficulties in laboratory research about the materials, so numerical simulation research in the paper is
introduced. The model of the random structure about SRA is set up, and then the study of seepage is
given. The conversion of the two boundaries is solved correctly in the computer program. So some
conclusions are drawn that the rock blocks the seepage to some degree, and the changing of RSA
seepage is little under the effect of the fluctuating of rainfall intensity, namely the changing of the
seepage is less than the fluctuating of rainfall intensity. The study is the foundation of the next study
about the coupled of stress and seepage of RSA.
Abstract: In this work, the microstructure of the dragonfly wing vein was investigated by the
finite element method (FEM). It is a bionic view to simulate the microstructure of the wing vein,
which could be used to construct the micro air vehicles (MAVs). From the FEM results, the sandwich
structure of the dragonfly wing vein was proved, which could supply more torsional deformation and
reduce the weight of dragonfly. And the protein layer in the sandwich structure almost not bear the
bending loadings, which could protect the protein not to be destroyed. It could assist us to utilize such
design for the new micro air vehicle (MAV), especially ornithopter.
Abstract: This paper deals with the monitoring and assessment of structural performance of
reinforced concrete residential buildings damaged during the lifetime by several important natural
disasters such as earthquakes. The problem belongs to the risk management of built environment
areas subjected to various natural catastrophes. In our work, we present a methodology based on
modeling, simulation and nonlinear analysis applied on two classes of existing buildings located in
the damaged infrastructure of earthquake sensitive cities. The decisions for risk mitigation taking
into account the real seismic vulnerability of structures are based on GIS (Geographical Information
Systems) mapping, and application of some artificial intelligence techniques. Finally, our paper
discusses a new methodology for awareness and mitigation of seismic effects in case of future
events in dense urban areas based on a case study for Iasi city, Romania.
Abstract: This paper utilizes Genetic Programming(GP) and Genetic Algorithm(GA) to analyze
experiment data. The purpose of this research is to establish a function model of the data. The core
methodology of this research is using GP to get the approximate model first, and then optimizes the
parameters and enhance the fitness value of the model by using GA. To validate this method, two
examples are given: one is the reconstruction of permeability-strain equation of the rock in
literature; another example is the function search automatically of the wire cable isolator
experiment data. In the process of programming of parse tree, this paper adopted a new way that
different from three traditional methods, the parse tree is described by matrix of special size, more
significantly, this new method makes the genetic operation of crossover and mutation intuitionstic,
even the pellucid Matlab programming language could implement it.
Abstract: Study on computational modeling of 4-stroke single cylinder direct injection diesel
engine is presented. The engine with known specification is being modeled using one dimension
CFD GT-Power software. The operational parameters of the engine such as power, torque, specific
fuel consumption and mean effective pressure which are dependent to engine speed are being
discussed. The results from the simulation study are compared with the theoretical results to get the
true trend of the results.