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The Harmonic Response Analysis of Engine Block Based on Modal Analysis Zheng Zhong-cai1,a, Gao Yan2,b, LIU Na1 , Zhang Kun-jin1, Chen Hai-ou1, Huang Xi-bin1, Wang Jin-Hu1 1School of Mechanical and Electrical Engineering, Shandong Jianzhu University Jinan, Shandong, 250101, China 2Shandong college of Electronic Technology, Jinan, Shandong, 250014, China azzc638@163.com, bgaoyan12002@163.com Keywords: Diesel engine block, Finite element, Modal analysis, Harmonic response analysis Abstract.
Introduction The engine block is the main spare part, and its dynamic characteristic affects directly the engine dynamic characteristic, the operational performance and the work reliability, therefore it play an important role in designing engine block that the dynamic analysis to the engine block is carried on.
It is necessary that the block structure is simplified when model is established, but the calculation accuracy can not be affected, so that the finite element analysis speed can be improved.
Engine block is mainly related to solid elements, and considering the influence of various factors, 10 nodes tetrahedron element is adopted in this paper which has good applicability to the boundary curve.
Any structure or component has a natural frequency and corresponding mode shapes, which are their inherent property.

Studies on the protection of aircraft oil tank’s microbic erosion based on properties of machinery and biological materials WEI Zhenga, WANG Fang Chaob ,WANG Yuan Shengc , YU Hong Weid,* Naval University of Engineering, Wuhan, China azhengweihjgc@126.com, bwfch1992@163.com, csklpmeysw@scu.edu.cn, dxgq1967@vip.sina.com * Corresponding author:Yu Hong Wei, E-mail: xgq1967@vip.sina.com.
In addition to these necessary conditions of water and hydrocarbons, many other factors, such as nitrogen, oxygen, phosphorus, sulfur and other elements are also provided the conditions for microbial growth in the fuel system.
Outlook As special supplies, aviation fuel are widely used in the field of military and civilian, affecting its quality and merits of the aircraft's self-evident.
Hebei University of Science and Technology, 2010,31 (3): 270--273 [10] Xia Zhi new hydraulic system contamination control [M] Beijing: Mechanical Industry Press, 1992: 10-15

The entry phase is regarded as the biggest influencing factor for the reamer’s deflection with increasing bore depth.
Improving engine’s control, adding a boosting device, reducing number of cylinders and increasing the surface properties accompanies downsizing.
Since each machining process is affected by undesired disturbances, deviations concerning the target geometry in the area of the pre-drilled bores can occur [8].
The entry phase is regarded as the biggest influencing factor for the reamer’s deflection over the bore depth.
Table 1: Material properties of used 42CrMo4V Rp0,2% Rm A Z hardness 672 N/mm2 900 N/mm2 19% 57% 280 HV For these experiments tests with two different bore diameters were conducted.

For example, hybrid membranes able to combine the properties of different materials are proposed.
Today, new hybrid membranes able to combine the properties of different materials are proposed.
Therefore, pre-treatment selection and condensate handling are critical decision factors for a proper operation of GS modules [[]Bernardo P., Drioli E., Golemme G., Ind.
Mixed matrix membranes are a well-known route to enhance the properties of polymeric membranes (Figure 1-(D)).
Table 3 highlights a comparison among the properties of these three types of membrane.

And put forward the methods of improving the carbonation resistance properties of sulphoaluminate cement foam materials.
The domestic research on properties of large diameter insulation material were focused on the mechanical properties and thermal performance, the study of durability and performance for compression and permeability is relatively less [3].
Therefore, to improve the durability of sulfur aluminate foamed cement, the study on the impact factors of its anti-carbonation properties are meaningful.
Thus, the holes structural integrity have a greater impact on the anti-carbonation properties of the foamed cement.
Influence of selected hydrophobic agents on some properties of autoclaving cellular concrete, J.

The models that are built between tree growth management and various parameters that affect tree growth management model using neural network modeling technology are used to conduct comprehensive study; Expert system is used for expert reasoning and judgment, and study how to collect, summarize and analyze the experience and knowledge of the field of expert, analyze expert system knowledge, as well as the reasoning mechanism, and make full use of the characters of the expert system reasoning.
Growth Modeling Techniques The link between tree growth model and influencing factors requires mining, and the plant growth simulation models are improved.
Considering environmental factors, the simulation of the process of tree growth is made using data in the field of tree growth management ontology database, the tree growth management and related factors that affect tree growth management growth model are made, these models quickly and accurately contribute to obtain and analyze a variety of information of the state of tree growth and the environment.
Tree growth simulation mainly presents qualitative observations of different growth conditions, and different growth stages of trees, judge growth mode, determine the overall framework of the morphology of description, measure the quantitative determination of tree topology, geometry, mechanical properties, extract rules morphology model of the trees, simulate tree growth based on growth rules, and the establishment of tree growth model based on a variety of competitive factors.
Conclusion The paper performs depth study on tree growth simulation model, and the integrated use of tree growth simulation model technology, the ontological techniques, neural networks and expert systems technology are used to establish tree growth management decision model, then tree growth management resources data can form unified platform for the sharing, fully considering the various factors that affect tree growth management and the degree of standardization of data, make integrated growth simulation model and the analysis and evaluation system, so generate dynamic and intelligent decision-making information which are applicable to the different experimental designs.

Addition of nickel was seen in some stainless steel grades to promote better corrosion resistance without compromising the mechanical properties.
Future scopes are available for research on effect of welding parameters on mechanical properties and corrosion resistance of laser welded SASS joints.
Improved mechanical properties of aluminum modified ultra-pure 429 ferritic stainless steels after welding.Materials Science & Engineering. 2019: A749; 210–17, [4] A.
Some Unexpected Properties of 18 and 8 Chromium.
Effect of heat input and accumulated fatigue damage on mechanical properties of dissimilar AL-6XN/316L welded joints.

Since meat putrefaction is a complex process that is influenced by many factors, it is necessary to have a comprehensive investigation of the various indicators to determine the freshness of meat.
Arguably, the methods above have only consider single factor (elasticity or odor etc.) for the detection the freshness of meat.
However, because meat rotten is a complex process that is influenced by many factors, therefore, we should integrate various indicators to determine the freshness of meat.
Based on research of different types of MOS gas sensor and properties of volatile gas in the process of storage chicken, the MOS gas sensor of TGS series were selected: TGS2600, TGS2602, TGS2610, TGS2611, TGS2620 and TGS2442 models.
Adequate selection of sensor and proper combination of array, will directly affect the performance of the electronic nose system.

With the interconnection density and doubling the number of layers in VLSI, Interconnect line width,pitch,and the thickness of the dielectric layer will changed within the same chip caused by the process variation. and the interconnect parasitics changes ultimately affect circuit performance and yield.IC designers need an accurate BEoL corner model to help circuit design.
It is designed to provide a standard method of BEOL performance; it provides a parametric representation to almost all factors in BEOL process, simplifying the overly complex factors.
In addition to two parameters related with permittivity, the other five parameters have more than ten percent greater variations during manufacture, which will be a very huge challenge to the Corner analysis and modeling,and this also affect chip yield ultimately.
This test structure is used to observe the characteristics of dielectric layer that between metal layers, and most affected the characteristics of dielectric layer is its thickness and permittivity.
Comb Meander test structure is a special test structure, it can be used to measure two electrical properties, capacitance, and resistance.

In this work, the wear of a steel mold caused by the molding of a plastic-bonded ferrite magnet has been studied with the aim of determining the main wear factors.
The polymer matrix amount for the 10% of the total weight, while the remaining 90% is made of ferrite fillers enriched with rare earths in order to further increase the magnetic properties.
The injection molding process is suitable for manufacturing magnets with high mechanical and dimensional properties at low cycle times.
(3) A qualitative model of total reaction force has been developed taking into a count the ring and the mold core mechanical properties, the initial dimensions and the final ones.
The high performances showed by this material are imputable to its elevated mechanical properties especially for its surface hardness (3000 HV) A286 steel is the material which shown the worst behavior since it presents the highest material removal rate.