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英语翻译较多,帮我翻译部分也行,原文如下:本文以江苏某企业YZ4DE型柴油机为具体对象,系统地探讨了有限元法在内燃机结构

来源:学生作业帮 编辑:作业帮 分类:综合作业 时间:2024/05/25 17:13:15
英语翻译
较多,帮我翻译部分也行,原文如下:
本文以江苏某企业YZ4DE型柴油机为具体对象,系统地探讨了有限元法在内燃机结构设计中的应用,对该机型的机体组合件进行了全面深入的有限元计算和分析,涉及强度、刚度、接触、热应力、热变形等诸多问题;共分析了两种工况:预紧工况和工作工况(第2缸爆发);提出了气缸套变形的部分评价指标,重点考察了气缸垫的密封性能.本文对推动有限元分析技术在我国内燃机结构设计中的实际应用将起到一定的促进作用.
本文的主要内容和主要结论如下:
1.首先利用PRO/E软件建立机体组件(机体、气缸盖、气缸垫、气缸套、主轴承盖、飞轮壳、齿轮室连接板、水泵壳体、油底壳、左右悬置支架、后轴油封盖等)的三维实体模型;然后利用Hypermesh软件划分有限元网格,保证了良好的网格质量,较好地协调了网格数量和计算精度之间的矛盾;最后利用ANSYS软件对机体组件进行了有限元分析.
2.预紧工况下,缸盖螺栓沉孔深度对气缸套变形影响很大,适当的缸盖螺栓沉孔深度有利于减小气缸套变形.机体上气缸筒铸造偏心、缸盖螺栓拧紧力矩等对气缸套变形影响不是很大.
3.工作工况下,对于第2缸(爆发缸)来说,气缸套径向过盈量对气缸套变形影响很大,减小气缸套径向过盈量,有利于减小气缸套的变形,减小机体顶面不平度,但会增大机体上缸套止口平面的不平度;减小缸盖螺栓预紧力对气缸套变形影响很小,可减小机体顶面不平度和机体上缸套止口平面的不平度;适当减小缸盖螺栓沉孔深可以减小气缸套的变形,但会造成机体顶面不平度和机体上缸套止口平面不平度的增大.
4.工作工况下,气缸垫能密封高压燃气和润滑油,但是对冷却水的密封性能较差,在机体后侧推杆室附近可能有渗水现象.
5.工作工况下,第2、3、4对缸盖螺栓立柱存在较大的y方向拉应力,主轴承盖上存在较大的z方向拉应力,除此以外没有发现存在较大拉应力的地方.
Please help me master the summary translation on Diesel
Reward points: 30 - from the end of the issue there two days 7 hours
More help me translate part also, I would like to thank the. Reads as follows:
In this paper, an enterprise in Jiangsu YZ4DE diesel engine for specific targets, systematically explore the finite element method in the structural design of the internal combustion engine application, the body of the aircraft conducted a comprehensive portfolio of in-depth finite element calculation and analysis, involving strength, stiffness, contacts, and thermal stress, thermal deformation, and many other issues ; a total of two conditions: Preload working conditions and working conditions (No. 2 cylinder outbreak); proposed deformation of the cylinder sets of evaluation indicators, mainly inspected the cylinder gasket sealing performance. In this paper, the finite element analysis technology to promote China's internal combustion engine in the structural design of practical applications will play a role in promoting.
The main contents and main conclusions are as follows:
1. The first to use PRO / E software components establishment of the body (body, cylinder head, cylinder pad, cylinder liner, the main bearing caps, Flywheel carcasses, gear Connection Board Room, Shell pump, oil pan, about mounting frame, rear axle oil blocks, etc.) 3D solid model; Then use Hypermesh software division finite element mesh to ensure a good grid quality, and better coordination of the grid between quantity and accuracy of contradictions; Finally using ANSYS software components of a body finite element analysis.
2. Preload condition, the cylinder head bolt-hole depth of deformation of the cylinder sets a great impact on the proper cylinder head bolt hole depth Shen cylinder liner to reduce the deformation. Casting on the cylinder body tube eccentric, cylinder head bolt tightening torque, and other deformation of the cylinder liner influence is not very great.
3. Working Conditions, No. 2 cylinder (the outbreak of cylinder), the cylinder sets of radial a surplus deformation of the cylinder sets a great impact on the cylinder liner reduced radial a surplus amount to reduce the deformation of the cylinder sets, the top surface of the body decreases roughness, but it will increase the body on the plane cylinder only mouth the roughness ; Preload reduced cylinder head bolt deformation of the cylinder liner little effect, the body can reduce the top surface roughness and cylinder body on the plane I ended roughness; Shen appropriate reduced cylinder head bolt hole deep can reduce the deformation of the cylinder sets, but will cause the body and the top surface roughness on the cylinder body only I roughness increases Plane .
4. Working Conditions, high-pressure cylinder pad can be enclosed gas and lubricants, but the cooling water sealing performance poor putters in the back room near the body may have leakages.
5. Work condition, the cylinder head bolts column 2,3,4 there is a big y direction of tensile stress, the main bearing canceled with the existence of large z direction tensile stress, there is a big addition found no tensile stress areas.
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