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Improving Gearbox Design and Analysis for Offshore Wind Turbines Hui LONG1, 2, a, Jingze WU1 and Andrew FIRTH1 1School of Engineering and Computing Sciences, Durham University, United Kingdom 2State Key Laboratory of Mechanical Transmission, Chongqing University, China ahui.long@durham.ac.uk Keywords: wind turbine, gearbox, design load, fatigue damage Abstract.
Using the software tool, results for the AGMA geometry factors and are calculated and verified in accordance with the AGMA 908 data sheets.
The Analysis Dialog facilitates the analysis of individual gear stages and allows the user to alter some of the factors and design criteria (e.g. design life, manufacturing accuracy) which may affect the calculation results.
The programme contains the calculation functions based on the AGMA 2001 rating equations and updates the results whenever a change is made to the geometry, material properties or design criteria.
Acknowledgement The first author would like to acknowledge the support of Visiting Fellowship from the State Key Laboratory of Mechanical Transmission, Chongqing University, China.

The concentration of sericine protein was altered in CA polymeric solution that imparts variable properties to fabricated membrane samples.
Cellulose is a colorless and odorless polymer but possesses excellent characteristics like, fine mechanical strength, superior biocompatibility and hydrophilicity, high absorption potential and relatively better thermal resistance [8].
Hu, “Smart” Materials Based on Cellulose: A Review of the Preparations, Properties, and Applications, Materials. 6 (2013) 738-781
Ulbricht, Factors affecting the sieving behavior of anti-fouling thin-layer cross-linked hydrogel polyethersulfone composite ultrafiltration membrane, J.
Zhao, Controlled synthesis of Ag nanoparticles with different morphologies and their antibacterial properties, Mater. 

The CAD software taking three-dimensional entity modeling technology as the core technology and the CAE software taking the virtual prototype technology and finite element technique as the core technology become more and more mature, and those technologies have been widely used in the design of mechanical products.
These features have affected the software’s’ functions in a certain extent.
Solidworks software has good seamless connection properties with ANSYS software, the Solidworks model can be put directly into ANSYS for finite element analysis.
The modal analysis for 7021 bearing assembly Because the bearing assemble is bearing alternating load in the actual working conditions, and the vibration may also be generated because of outside incentive, which will generate larger dynamic stress in internal structure causing the destruction of the bearing assemble and affecting the precision and stability of the transmission.
The dynamic analysis of the structure, The factor values of each order modal has an inverse ratio relation with the modal frequency, namely the lower mode characteristics determine the bearing assemble characteristics.

Introduction Though far from the structural quality of α-SiC crystals, the 3C-SiC layers grown on Si substrates have properties which are sufficient for many applications ranging from various mechanical sensors to simple electronic devices.
The mechanical stress induced by this discrepancy results in a bow roughly proportional to the layer thickness and can reach several hundreds of micrometers for a 5 µm thick layer on a standard 2" Si wafer.
In the same way, the c and d curves show that the bow is reduced by a factor of four or more for a same SiC layer thickness deposited on a checkerboard patterned substrate (first carbonization in tension and then in compression).
This means that the presence of adjacent areas with different morphology and opposite strain sign does not affect the local growth mechanism.
However, the tensed zone is still rougher than the compressed one but this difference does not seem to affect the polishing of each zone.

The sheath surface should be smooth, no sag, elastic appropriate, no visible steel strand outline, no cracks, no pores, no obvious wrinkle and mechanical damage
(3) Inspection of mechanical properties: include tensile test, bending test, modulus of elasticity, friction test and so on.
Table 1 Prestressed steel strand inspection items and sample size Serial number Inspection items Sampling number Sampling location Inspection methods 1 Surface Each hank Visual 2 The contour diameter Each hank Intercept any section from each hank Use measuring tool with 0.2mm division value measure the diameter of the steel strand 3 The steel strand unbend performance 3 roots/ each batch Use measuring tool with 1mm division value to measure 4 The most strongly of the whole steel strand 3 roots/ each batch According to the provisions of the GB/T5224-2003 in 8.4.1 5 Provisions the proportion of tensile 3 roots/ each batch According to the provisions of the GB/T5224-2003 in 8.4.2 6 The maximum total elongation rate 3 roots/ each batch Intercept any section from each hank According to the provisions of the GB/T5224-2003 in 8.4.3 7 The stress relaxation performance Not less than 1 root / each batch According to the provisions of the GB/T5224-2003 in 8.5 Table 2 The appearance and mechanical
property commonly used level 1860 steel The standard diameter /mm The standard size /mm2 Tensile strength /Mpa The minimum tensile force /kN The minimum load to elongation 1%/kN The minimum elongation /% 1000 hours maximum relaxation loss 70%F 80%F 15.24 140 1860 260.7 234.6 3.5 2.5 4.5 2.
Project quality is affected by many factors, so need to implement the quality control before, under and after construction, strictly control on technology, operations in strict accordance with the construction technology requirements, don’t ignore every detail, guarantee the quality of the whole project in the end.

The fibers diameters and morphology were observed by using Scanning Electron Microscopy (SEM).While the mechanical properties of the fibers was observed via tensile strength test.
Mechanical strength.
Physico chemical properties of dense electrospun membranes.
The finest fibers obtained form e-spunCL17 showed the best physico chemical properties compared to others.
Mechanical properties of composites using ultrafine electrospun fibers.

Influence of Aluminum Nanoparticles Additives on Tribological Properties of Base Oil Vu Nguyen-Anh Le1,a, Jau-Wen Lin1,b* 1Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences 415 Jiangong Rd., Sanmin District.
The performance factors, such as COF, wear rate, thermal transfer onto the disc surface, as well as lubricant admixture, were evaluated in order to achieve an average value for the three trials conducted.
Wu, Tribological properties of oleic acid-modified graphene as lubricant oil additives, J.
Rohatgi, Effect of In-situ Processing Parameters on the Mechanical and Tribological Properties of Self-Lubricating Hybrid Aluminum Nanocomposites, Tribol.
Kalam, Tribological Properties and Lubricant Mechanism of Nanoparticle in Engine Oil, Procedia.

Some of these cracks affect the strength and consequently the safety of the dam.
T B b τ ωτ ε = + + (1) Where B is the amplitude of atmospheric temperature, B=20.0°C; ω is the circle frequency, ω=π/12; τ is time, month; ε0 is the phase angle, ε0=-6.5 months; b0 is the compensation factor of the atmospheric temperature, b0=2.0°C.
d f y ε γ = − − (5) Where T(y,τ) is the water temperature; y is the water depth, m; τ is the time; Tm(y) is the average temperature when water depth is y; A(y) is amplitude of temperature when water depth is y; other constants as show as follows: a=5.67, b=11.1, A0=13.4, β=0.013, α= -0.04, d=2.15, f=1.30, γ=0.085, τ0=6.5.Assuming constant and homogeneous thermal properties, the two dimensional heat transfer problem is governed by the differential equation 2 2 2 2 / / / .
Mechanical parameters of concrete dams are listed in Table 2.
It is now accepted that concrete deteriorates with time, not so much as a result of any lack of strength, but usually as a result of an inadequacy in one of its other properties.

Seamless pipes manufactured from the above grades possess the required properties, but they also have a number of limitations: the surface of finished products is of low quality as a result of a peritectic reaction during crystallization; besides, pipe performance is not high enough.
A detailed analysis of various factors which affect the performance of low carbon steel grades is performed in [2, 3].
Junoven, Effects of Non-metallic Inclusions on Fatigue Properties of Calcium Treated Steels, Helsinki University of Technology, Dissertation for the degree of Doctor of Science in Technology, 2004
Poluhina, Effect of heat treatment on the mechanical properties of 08G2MB type steels with an ultradispersed structure, Manufacture of rolled metal products. 2 (2017) 20-25
Vinograd, Inclusions in steel and its properties, Metallurgy, Moscow, 1963, p. 252.

Additive manufacturing has significantly advanced in the last two decades and can now produce various mechanical components.
Such pieces aim for future application in hip implants, in which, in addition to the more flexible Ti stem, a femoral head with properties close to the Co-Cr-Mo alloy for excellent wear resistance.
Advances in Mechanical Engineering 11.2 (2019): 1687814018822880
Chinese Journal of Mechanical Engineering 37.1 (2024): 87
"Elucidation of laser welding phenomena and factors affecting weld penetration and welding defects."