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The stiffness of transmission mechanism, assembled joints and moving platform, the compressibility of oil, and the load inertia of hydraulic Stewart mechanism will cause synthetically mechanical and hydraulic resonance problems, which will directly influence the system dynamic performance.
Analysis of dynamic performance based on natural frequency The natural frequency of hydraulic parallel mechanism is affected by many aspects, which includes structural parameters, such as arrangement of moving joints, dynamic parameters, such as the actuator quality, inertia and the distribution of the load, also includes material properties, such as stiffness of the joints and rods, density, etc..
Therefore, when analyzing the frequency and dynamic isotropy index, the moving platform mass factor can only be considered.

On the highway, heavy vehicle accidents cause huge casualties and property losses.
It not only affects the automobile driver's ease of operation, but also determines the safety of semi trailer tankers in high speed driving.
Its degrees of freedom of nonlinear mechanical model are up to 71, which was the most complete car train simulation software.
Among them, the mechanical simulation software TruckSim developed by United States is relatively well.
[5] Nalecz, A.G., Influence of Vehicle and Roadway Factors on the Dynamics of Tripped Rollover, Int.

Even though the mechanical properties of the core material is relatively low, but shear strength of whole structure is mainly borne by core material. the laminates only takes some role in the shear.
It allows the panel and sandwich layer with different material properties.
Constitutive relation of the composite structure is complex, many effect factors are involved.
As the layers of material are orthotropic, material properties are closed with material principal axis orientation, so defining layers of materials of performance and direction should be noted.
Unit SHELL 91 may allow the panel and the sandwich layer have different properties, such as the setting of KEYOPT (9) = 1 can activate the "sandwich" option.

Obturator resin incorporated with vanillin has been produced and shown to have antimicrobial properties against some bacteria and yeasts.
The incidence of infection is induced by factors shifting the local environment.
It can affect the physical, esthetic, and hygienic properties of the processed obturator.
This occurs through many factors, such as air entrapment during mixing, the presence of residual monomer, and monomer contraction during the polymerization, resulting in porosities [8].
The resin has unique properties, including ease of manipulation, suitable mechanical properties, aesthetics, cost-effectiveness, and quite lower toxicity [9].

Dynamic Simulation Analysis of a Ship-borne Loading Device ZHU Hong-jun1, YAO Hai2 1School of Numerical Control Engineering, Zhejiang Industry Polytechnic College, Shaoxing 312000, China 2School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China Key words: ship-borne loading device; dynamic analysis; ADAMS; virtual prototype Abstract.
Kinetic property of ship-borne device was simulated, dynamic behaviors of key parts were also analyzed.
Introduction In the actual sea conditions, ship movement by many factors. 70% of the time because the sea there are different degrees of the size of the wave, caused by the swaying movement not only affects the safe navigation of ships, but also affect the operational safety of ship-borne devices, so the ship motion and loads in waves has been studied the field of ship design key [1].

The sintered polycrystalline diamond layer featured high abrasion resistance, high impact resistant, high mechanical strength, and fracture toughness, while the WC-Co substrate provides an interface for attachment, making PDC superhard material a favorite choice for cutting and drilling industry.
The well property of HBN in thermal conductivity, insulativity, and stability in HPHT makes it competent as sintering mold that placed between the graphite tube and the sample.
It illustrated surface processing could affect residual stress.
Some experiments had demonstrated that there are many other factors affecting residual stresses in the PCD layer except for the expansion mismatch between the carbide and the PCD layer.
For example, the thickness ratio of the carbide layer to the diamond layer, cooling procedures, sintering process parameters [9, 18], were all found to affect residual stresses.

Optimization of Aerodynamic Performance of Wind Turbine Blades Hua-Wei Chi1,a, Pey-Shey Wu1,b, Kamiru Chen1,c, Yue-Hua Jhuo1,d, Hung-Yun Wu2,e 1Department of Mechanical and Automation Engineering, Da-Yeh University, Taiwan(ROC) 2Department of Mechanical Engineering, National Chiao Tung University, Taiwan(ROC) ahwchi@mail.dyu.edu.tw, bpswu@mail.dyu.edu.tw, cR9811006@mail.dyu.edu.tw, dgundam734@yahoo.com.tw, ewuhy@mail.honsim.com 1Corresponding author, email: hwchi@mail.dyu.edu.tw Keywords: optimization, wind turbine, neural network, aerodynamics Abstract.
The factors that affect the efficiency of a wind turbine may include the shape of air foils, twist angle, blade size, number of blades, etc. [2, 3].
Determination of these factor values plays an important role on improving efficiency of wind turbine rotor.
Practically, the attainable maximum power coefficient is much lower than the Betz limit for it is affected by the tail flow, the number of blades, blade tip loss and aerodynamic frictional loss.
Although XFOIL can be used to evaluate the aerodynamic properties of two-dimensional airfoils, the major difficulty of incorporating it into the optimization code is that it might not converge under certain circumstances.

Introduction Self-bearing motors are able to support and rotate a rotary shaft by magnetic force without any direct physical contact [1]-[3], and thus have many advantages over the combination of conventional mechanical bearings and motors.
Despite its benefits, the self-bearing motor system tends to be more complex and have a higher risk of system failure than traditional motors due to additional mechanical and electrical components.
When the alternating current has reached its positive peak value at current phase 90°, the induced current at the auxiliary winding is negligibly small and does not affect the distribution of flux produced by the main windings.
The induced current at the auxiliary winding is very small and does not affect the distribution of flux produced by the main windings, which is uniform in the airgap.
This is considered partially due to mesh element size and shape and partially to the model’s magnetic properties not matching closely enough to the fabricated stator core (laminated silicon steel sheet).

A Numerical Study of an Injection-Compression Molding Process by using a Moving Grid Bambang Arip Dwiyantoro Department of Mechanical Engineering, Institute of Technology Sepuluh Nopember, Surabaya, Indonesia bambangads@me.its.ac.id Keywords: Numerical Study, Injection-Compression Molding Process, Moving Grid Abstract.
To describe the rheological properties of polymer melt, the modified-Cross model is adopted in the numerical scheme: (7) (8) where denotes the shear rate, h0 the viscosity of zero shear rate, n, t*, B, Tb are parameters of material properties.
Table 1 summarizes the constants of employed Modifield-Cross model and related material properties for the injected melt.
Modified-cross model and material properties for Polystyrene r (kg/m3) 940 cp (J/kg.K) 2100 k (W/m.K) 0.18 n 0.2838 t* (Pa) 1.791´104 B (Pa-s) 2.591´10-7 Tb (K) 11680 Table 2.
Compression speed or compression time is one of factor that affects the molding pressure and the temperature of the melt.

The feedstocks properties, such as fluidity and homogeneity, is the critical condition to ensure quality of the final products.
Liu evaluated properties of the feedstocks for micro injection molding and its feasibility[8].
The Characteristics of Powder and Binder Properties of the powders Table 1.
In order to compare the effect of powder size on feedstock properties, two powders of average size 16 µm and 5 µm are used for feedstocks mixture.
Binder composition is the most important factor to qualify the feedstock.