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As Rivin points out, in the mount stiffness, the great deviation between the engine weight, center of gravity inertial motion and position of the actual vehicle, their deviation will greatly affect the optimization results of engine mounting system, and lead to restricted its practical application.
Modal analysis of engine assembly The vibration characteristics of the mechanical system mainly depends on the system itself, the inertial, elastic and damping.
These properties of the actual structure is relatively complex, in order to carry out the calculation and analysis of vibration characteristics of the mathematical tools for their use, the actual system need to be simplified to some extent: ignoring secondary factors, properties of simplifying its quality, stiffness, damping and other parameters and distribution, established can reflect dynamic characteristics the actual system also has the possibility of dynamic model of the.
Mechanical model of ideal therefore simplified from the actual machinery to reflect the physical process, it is necessary to determine the four elements.
An Investigation of Fatigue Failures of Turbine Blades in a Gas Turbine Engine by Mechanical Analysis.

Wavelet analysis has good time-frequency localization properties and adaptive capacity of the signal, so it is able to analyze all sorts of time-varying signals effectively.
That can simulate a mechanical vibration environment.
Wavelet function with different parameters has different time-frequency properties.
In turn, the smaller tightening torques, the more non-linear factors in relative displacement among the fittings, which results in the energy of the bandwidth increases and the separation collision of macro-scale happens.
Wang: Mechanical Science and Technology, Vol. 25 (2006) No. 1, pp. 102-106.

The growth of tin whiskers has the potential to affect every industry.
The choice of solder alloy could be influenced by factors such as: substrate material used (e.g. brass or copper), the residual stresses within the substrate (copper-plating, immersion plating), composition and properties of intermetallic compounds formed and the diffusion of alloying elements within the tin.
In view of these factors, a new tin-based solder alloy for electronic components [6], was prepared using melt spinning method [4], is presented in this paper.
Experimental equipment used for the preparation of Sn-based alloy ribbons Figure 3 Sn-Cu-Ga ribbons prepared by melt spinning The experimental equipment, shown in Figure 2 [4], is comprised of: copper roller, mechanical transmission, an electric motor, an induction coil, a cylindrical crucible, a medium frequency generator and a control panel [4], [5].The alloys used in this research programme were developed based on tin-copper with the requirement that they possess good properties for the soldering of electronic components.
Knowing that one the factors of developing tin whiskers is diffusion between Sn and Cu, alloy from Sn-Cu-Ga family can be a potential tin alloy which can be prevents tin whiskers.

The variability of powders arises from the many ways in which their flow properties may be changed, such as: physical properties of the powder particles such as their size, size range, shape, hardness, elasticity, porosity, mass, interactions between particles, texture, angularity and so on.
Environmental factors that affect the powder bulk properties, such as the air or moisture content, external pressure, vibration, etc. [13].
More mixers types, equipment with a description and general properties can be found in [9].
They differ in properties, such as shape, average dimension, bulk density, cohesion.
Yan, Food Powders Physical Properties, Processing and Functionality, Springer-Verlag, New York, 2005

Other than magnetic particles, the base fluids, surfactants, anticorrosion additives are important factors that affect the rheological properties, stability and redispersibity of the MR fluids.
Comparison of the properties of MR, ER, and Ferrofluids [41].
Phule, Rheological Properties of Magnetorheological Fluids.
Demchuk, Additional Magnetic Dispersed Phase Improves the MR fluid Properties.
Huo and et.al, Electrorheological Properties of Chitosan Nitrate Suspensions.

Nickel [16], developed a thermal model based on laser heating with no material addition, temperature independent material properties, to estimate the temperature history and subsequently stresses for different deposition patterns.
The present research intends to develop a thermal model for weld based deposition using a moving Goldak Double Ellipsoidal heat source, temperature dependent material properties and time dependent material addition.
In the quiet element approach the part of structure which has not been laid as yet is included in the initial computational model but these elements are made passive by assigning them with material properties so that they do not affect the rest of the model.
These quiet elements will remain passive until the material properties are again changed to the actual values, and then they become part of the structure and thus simulate time dependent material addition.
In this paper the quiet element approach is used and the stiffness scaling is done by a factor 10-6.

To prevent this overestimation, we applied our two adjustment methods to fatigue life prediction for typical random stresses observed on mechanical products.
Figure 1 Cantilevers under random acceleration Figure 4 Fatigue resistance curve Table 1 Properties of cantilevers and base motion No.
On the other hand, the difference between the probability densities for large stress amplitude largely affects the amount of damage.
Given a stress PSD, , Np, and r are calculated using the properties of that PSD.
Pioli, Fatigue behavior analysis of mechanical components subject to bimodal stress process: frequency domain approach, International Journal of Fatigue, Vol. 27, pp. 335-345 (2005) [5] D.

Design and Simulation of the Cleaning parts of Comb-Type Cotton Picker Yiping Yuana, Wenlei Sunb, Shuai Huangc and Yiyou Nid Yanan road 1230# Tianshan district Urumqi xinjiang China, Mechanical Engineering College of Xinjiang University ayipingyuan@163.com,bsunwenlei007@163.com,c huangshuai9228@126.com,dniyiyou@163.com Keywords: Comb-Type Cotton Picker; The Transmission System; Key Components; Simulation Abstract.
Its working performance directly affects the complete machine efficiency.
But “hardly pick up’” has been one of the factors inhibit the development of cotton industry in Xinjiang [1].
The Qing-ling machine transmission sketch map Building three-dimensional model based on Pro/E Adopting bottom-up modeling method in hierarchy to build information model of Qing-ling machine with a hierarchical digital prototype, including visual machine parts model, physical properties model and geometric topology model in order to meet the requirements of different kinds of analysis of Qing-ling machine prototype which the assembled model of products related to Qing-ling machine virtual prototype is built based on.

The RLS Lattice-Ladder algorithms and its adaptive filter property in the process of feature extraction were discussed.
Because of the lattice filter is order recursive, so the number of sections that it contains can be easily increased or decreased without affecting the reflection coefficients of the remaining sections.
is the weighting factor.
Its structure is highly modular and has the desirable properties of stability, and it has been applied in many adaptive filtering.
Journal of mechanical engineering, Vol.48(2012) , p.37-48

Microstructures and damping properties have been investigated in Fe-23%Mn-(0~2)%Si and Fe-23%Mn-(0~2)%Co alloys, based on experimental results from metallography, X-ray diffractometry and vibration test in a flexural mode.
On the contrary, an addition of Si affects to decrease the amount and number density of ε martensite, giving rise to a decay of damping capacity.
Introduction Among various kinds of ferrous and non-ferrous high damping alloys, Fe-high Mn alloys undergoing γ(fcc)→ε(hcp) martensitic transformation have recently gained an increasing attention owing to their pronounced damping capacity and good mechanical properties [1-4].
Starting temperature of γ→ε martensitic transformation (Ms) was measured using a thermo-mechanical analyzer (TMA) with a cooling rate of 3K/min.
Fe-23%Mn 1%Si 2%Si 1%Co 2%Co 0.07 0.08 0.09 0.10 0.11 0.12 0.13 Logarithmic decrement (δ) Alloy Cooling to 298K Cooling to 288K Cooling to 77K Where, ∆δv, ∆δsf and ∆δγ/ε represent the damping properties connected to the movement of ε martensite variant boundaries, stacking faults inside ε martensite and γ/ε interfaces, respectively.