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Coal Mine Mobile Refuge Chamber with Square Cross Section Structure Finite Element Analysis Anning Zhang1,a, Yuming Gu1,b, Jinjun Tai2,c, Zhonghui Yin1,d, Xuequn Fan1,e, Binhui Zhang1,f 1School of Mechanical Engineering College, Anhui University of Science and Technology Huainan, Anhui Province 232001, P.R.
Fig. 1 Mobile refuge chamber three-dimensional model figure Chamber Strength Design and Stability Analysis Material Properties of the KJYF96/10 Mobile Refuge Chamber.
The overall chamber material is Q345 steel and material properties as Table 1 shows.
(3) Don't consider bolt connection, force, force transmission factors
In this case, after unloading stress is released, the material properties to a certain extent "Work Hardening" or strengthen.

The density of the parts is approximately 100% with mechanical properties that even can beat conventional manufacturing processes like e.g. die casting [2].
To improve build rate by factor 10 an innovative laser concept is build up at Fraunhofer-ILT.
These process improvements help to build up aluminum parts quickly that are suited for eco-design due to its low weight and superior mechanical and chemical properties.
The manufacturing process e.g. can make a changed base material necessary or change parts properties.
As a result for an overall technology benchmark it is oblige to consider all factors to gain a comprehensive overview about suitable manufacturing techniques.

In addition to these factors in model experiment, influences of residual stresses on ultimate load-carrying capacity were analyzed by finite element numerical simulation analysis, the results show the residual stresses affect the ultimate load-carrying capacity of angles by about 5％ or less.
According tangent stiffness theory analyzed some factors (cross-section shape, material, residual stress, initial bending, initial eccentricity), LI Kaixi [2] drawn many stability coefficient curves.
The mechanical properties of the material in the angles were determined from tension tests.
The program adopted non-linear static analysis method and considered material nonlinearities and geometric nonlinear factors.
For these angles the residual stresses, which affect the ultimate load-carrying capacity of angles by about 5％ or less，can be neglected.

As a result of the individual factors and their combinations a lot of production technology routes are feasible.
Although the number of affecting parameters is not so large, the determination of important parameters' values (intercritical temperature, cooling rate, temperature and duration of quasi isothermal stage) needs numerous pre-experiments before industrial production.
The paper describes a new simple method which can be applied for mapping the effect of technological parameters on the microstructural properties.
In addition to the increase of technological reliability the model can help in the prediction of structural and mechanical properties.
Taking into account the wide variety of chemical compositions of these types of steels and the wide range of affecting parameters, the developed method had to be as simple as possible.

Introduction With the development of industry, noise of mechanical structures has increasingly drawn more attention because its affect to environments and healthy are more important.
Modal superposition can be used to evaluate the acoustic frequency response of the cavity in the form of a linear combination of a limited number of modal eigenvectors { } { } [ ]{ }aap n i ii φφ ==∑=1 (5) Where {a} is modal participation factors, [φ] is modal eigenvectors.
The analysis flow is as follows: ①define velocity boundary conditions, impendence or admittance boundary conditions; ②define fluid material properties; ③define free boundary condition, and define jump pressure of free edge.
The analysis flow is as follows: ①define velocity boundary conditions, impendence or admittance boundary conditions; ②define fluid material properties; ③define the open surface is coupling surface between interior and exterior domain, build coupling relevant of interior and exterior domains; ④analysis, direct BEM coupling method need to build self BEM matrix of interior and exterior domain, and assemble system matrix, solve system equation, and then solve boundary variations of each model; ⑤compute radiation energy, and define field points to compute field point results. 2.3 FEM and DBEM Coupling Method.
About infinite element method, the coordination origin selection, infinite element surface selection, etc. affect the simulation results.

Introduction Since the discovery by Smolensky and co-workers in 1954[1], relaxor ferroelectrics have attracted continual interest due to their unusual properties.
Large dielectric permittivity observed in a broad temperature range and high piezoelectric coefficients accompanied by an almost hysteresis-free actuation strain have made relaxors a material of choice for high-end industrial applications converting mechanical into electrical forms of energy and vice versa [2-4].
It depends on the DW 3d elastic properties which are strongly affected at low temperature by local electric fields via the anisotropic Coulomb gap formation [21].
The collective pinning is dramatically affected by the anomalous temperature dependence of the DW elasticity which is gradually lifted by a thermally activated normal screening.
To quantitatively fit the experimental results, the other factors such as the dielectric rule of PNRs, the relaxior of dipoles located inside BaZrO3 cells need considered.

Zirconia ceramic widely applied in the fields of electronics, instrumentations and mechanical manufacture for its good physical and chemical properties.
These applications originate from the physical and chemical properties of Zirconia ceramic [6]; consist of thermal stability, chemical resistance, mechanical characteristics and ionic conductivity [7].
Fig2 shows the original Zirconia ceramic sample, and Table 1 lists the mainly physical properties of Zirconia ceramic, Table 2 lists the experiment condition in this study.
Yoshida, Properties of Ni/YSZ cermet as anode for SOFC, Solid State Ionics 3/4(2000): 253–260
The Properties, Use and Prospect of Zirconium Dioxide, Inorganic Chemicals Industry, 32/1(2000): 18-20

These characteristics and properties have led to its widespread use in the manufacturing sector.
The principal factors that affect the structural integrity of any aluminium opening are the choice of the bar profile for a given dimension of the opening (relating to the bending stresses caused by wind loading) as well as the workmanship in making the joints correctly.
The forced entry with damage to the structure relates to the ‘soft’ mechanical property of aluminium, which means it can be bent and distorted by tools such as crowbar.
Properties of glass were already available in the SolidWorks database and were found to be close to those of glass typically used in openings.
Conclusion This study brought to light several issues affecting the performance of aluminium openings.

This not only changes the appearance but also changes the internal organization of materials that improve mechanical properties.
Many process factors affect the effectiveness of the forging forming process.
Table 1 specifies the three design factors, each with two levels, for the forging processes.
The bicycle pedal forging process (Table 1) involved the following design factors: Factor A, temperature of die; Factor B, velocity of ram; and Factor C, friction factor.
The confidence and significance are highly critical for control factors.

The shear wave velocity of the soils is affected by many factors, such as geologic origin, buried depth, thickness of covering soil layer, soil condition and so on.
Taking into account the feasibility of statistical analysis, the quaternary stratigraphy of the Bohai Gulf roughly be divided into four types including silt (sandy silt included), fine sand (silt fine sand included), silt (sandy silt included), clay (sandy clay and silt clay included) according to factors such as lithology, genesis, physical and mechanical properties.
Statistical analyses Statistical method Plenty of studies have confirmed the discipline that the shear wave velocity of rock and soil mass increases along with the depth increasing, but the relationship is relatively complicated, and the growth is not a simple linear relationship due to the diversity of the factors influencing the shear wave velocity.
However, it should be possible to carry out the testing of the shear wave velocity due to the many factors affecting the shear wave velocity.
Correlation Analyses between Shear Wave Velocity and Ground Properties of Kunming Basin[J].Journal of Kunming metallurgy college, 2006, 22(3): p.1-5