Abstract: This study has set up 3D model of Welded Metal Bellows Diaphragms with the Geometry
module of MSC.Patran software, turn into the finite element and analyse models in MSC.Patran
software , has carried on finite element analysis with MSC.Nastran under the loaded operating mode
condition that is giving definitely, have received stress distributing and deformation situation of
Diaphragms, has carried on optimization design to Diaphragms on this basis.
Abstract: In this paper, the iBone (Imitation Bone) model which is coupled with Turing
reaction-diffusion system and FEM, is used. The numerical simulation of bone forming process by
considering the osteoclasts and osteoblasts process are conducted. The bone mass is increased with
increase of the initial load value, then fibula and femur bones are obtained respectively by keeping the
required bone forming value. The new S shape wave of metal welded bellow of mechanical seal are
designed based on the the optimization results through this method. The S shape and V shape both
were analyzed with FEM method. The same boundary conditions were given for two types of wave.
The results are shown that the stresses mainly concentrated on the welded area. It is interesting that
the value of the stresses of the two types of wave basically same. However, compressibility of the two
types of wave is very different at the same computation stage. The compressibility of S shape wave
was higher than V shape.
Abstract: Welding Continuous Cooling Transformation (CCT) graph reflects the relationship
between microstructure, hardness of steel heat-affected zone (HAZ), weld and welding cooling rate
continuous cooling from high temperature, and it is the basic to select welding material, determine the
optimum welding technology, relieve welding cracks and lay down standard of past heat treatment.
Welding technological parameters determine welding cooling rate, and the rate determines
microstructure, hardness of steel HAZ and weld, therefore we can calculate microstructure according
to known welding technological parameters and optimum parameters according to wanted properties
based on CCT graph. The system combines CAD and welding techniques, the welding CCT graphs
are made into drawing blocks at the platform of AutoCAD, the important data of welding CCT are
made into database, they are transferred and managed by Access. Based on Active Automation
techniques using Visual Basic, AutoCAD graph base are transferred and data of welding CCT can be
inquired and dynamically added to the base. The system has realized the prediction of welding
structure and properties and optimizing welding technology.
Abstract: This paper carried on mechanics analysis and the research to the Curved Rake Tine Frame
and Headstock of film recycling machine which could cut cotton stalk and recycle the used film
simultaneously. This machine was developed by the Institute of Agriculture Machine Xingjiang
Academy of Agricultural Sciences. This paper used servile methods to identify the structural
deficiencies such as Visualization Virtual Design, Finite Element Method and Testing Method. These
data provided a theoretical basis for the design of the Curved Rake Tine Frame and Headstock.
Abstract: The numerical controlled plastic film cutting machine in our design is used for flower
bags making. It is composed of four parts; cutting mechanism, delivering mechanism, tool rest and
machine bed. The tool rest is a critical structure to cutting and adhering operations. The tool rest is a
long -thin rod with big span, usually it’s failure is because of bending deformation caused by less
stiffness. In this study, we finished FEM 3D modeling of tool rest structure to increase its structure
stiffness. We analyzed bending deformation characteristics of the tool rest, performed 3D FEM
analysis and choose a relatively reliable structure after comparing maximum deformation in three
different candidate structures. As a result, support structure of the tools rest was optimized,
providing us a numerical data for structure reformation.
Abstract: A novel method for characterizing a high actuating capability light-weight actuator is
described and analyzed. The actuator comprises a truss core and smart face-sheets which result in
bending. The deformation of this beam actuator is obtained by changing voltage inside face-sheets
made from smart material. Materials selections are discussed for practice, and then optimization is
designed to ascertain minimum weight or maximum achievable displacement subject to two types
of constrains. Results show the composite trusses have higher stiffness and strength than metal
trusses. Comparisons with two corrugated core actuators, the truss-core design has better actuating
capability at specified weight.
Abstract: In geotechnical engineering, based on the theory of inverse analysis of displacement, the
problem for identification of material parameters can be transformed into an optimization problem.
Commonly, because of the non-linear relationship between the identified parameters and the
displacement, the objective function bears the multimodal characteristic in the variable space. So to
solve better the multimodal characteristic in the non-linear inverse analysis, a new global
optimization algorithm, which integrates the dynamic descent algorithm and the modified BFGS
(Brogden-Fletcher-Goldfrab-Shanno) algorithm, is proposed. Five typical multimodal functions in
the variable space are tested to prove that the new proposed algorithm can quickly converge to the
best point with few function evaluations. In the practical application, the new algorithm is employed
to identify the Young’s modulus of four different materials. The results of the identification further
show that the new proposed algorithm is a very highly efficient and robust one.
Abstract: Authors tried to construct multimedia base support system of the manufacturing process
with use of the knowledge base and the inference engine on the www server. This knowledge
database systematized the knowledge which was obtained from the document and the skilled engineer
as much as possible by using a knowledge engineering technique. However, it is difficult for beginner
to find the best processing condition under the condition of the material, the machine and the tool on
grinding operation by using the conventional database. Especially, when they encountered the
manufacturing condition which is not built into the conventional data base, the past optimum
conditions cannot be obtained from the expert system. The best method of obtaining the optimum
conditions as the solution of this problem is to execute some experiments for this new case. This
research proposed the system, which presented a minimum combination of the multi factor
experiments for the best manufacturing condition search by using the Taguchi method. We were able
to obtain the best condition to use the proposed robust engineering by only 18 times.
Abstract: This paper is addressed to the optimal control of the simply supported sandwich panel
with pyramidal truss cores. Firstly, according to the sandwich theory proposed by Sorokin and
Ershova, the eigenfrequencies of the sandwich panel are studied. Then based on the energy
criterion, the weight coefficient matrix Q and R for the linear quadratic regulator method are
obtained. By solving the Riccati equation, the displacement and control force are given. The curves
for the displacement response at the center of the plate are shown. From the numerical results, it is
found that this method is effective in suppressing the vibration of the sandwich panel with
pyramidal truss cores.
Abstract: In manufacturing Grid workflow, multiple tasks share a common and limited resource pool.
In order to solve task scheduling in multi-process with resource constraints under MG workflow, the
Task-Resource Constrained model is set up to descript the assignment relation between task and
resource. The framework of the task scheduling and the scheduling policies are also presented that
can readjust the tasks according to the priority rules and the time parameters in the process. Then we
present a heuristic scheduling algorithm that includes multiple policies. The heuristic scheduling
algorithm will update the critical path of DAG (Direct Acyclic Graph) and the beginning time of
post-tasks. MG Workflow engine can dynamically schedule the resources according the task
requirement. An example is given to illustrate the method at last.