For analyzing the relation between uncertainty of soft numerical control real-time tasks and manufacturing accuracy, a mismachining tolerance analysis method based on model is presented.

為分析軟數(shù)控實(shí)時(shí)任務(wù)的不確定性與加工精度的關(guān)系在线a片大全，提出一種基于模型的加工誤差分析方法。

A brief introduction of numerical manifold method,a new analysis tool of rock engineering ,is given first in this paper.

闡述數(shù)值流形法的基本原理激情文学视频在线观看，介紹數(shù)值流形法在巖體工程中的幾個(gè)應(yīng)用實(shí)例http://zhcy.com，并對(duì)數(shù)值流形法的特點(diǎn)及其在巖體工程中的應(yīng)用前景進(jìn)行簡(jiǎn)要評(píng)價(jià)。

The following are main contents studied: A finite element method for Navier-Stokes equation with ALE formulation is considered and by combined with theNewmark method of numerical intergration a pressure correction scheme is obtained for the solution of the FE formulation of N-S equation. Because the incompressibility condition can be satisfied approximately in this scheme, the interpolation functions of elements can be equalorder for the velocity field and pressure field. In the ALE formulation the fluid-solid interaction analysis became a three-field coupling problem of the fluid field, the solid field and the fluid dynamic mesh. The properties and charactiristices of this three-field coupling problem are deeply discussed.

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Based on the numerical calculation and the analysis of the calculated results, a solution to alleviate the harm of the slurry waterhammer in the pipeline was proposed, i.e.,installing a surge tank at the highest point of the pipeline and increasing the moment of inertia of the water pump motor.

通過對(duì)數(shù)值計(jì)算結(jié)果的分析黄色视频在线观看禁止18岁，提出了在管道頂端最高點(diǎn)設(shè)置調(diào)壓井和增大電機(jī)飛輪力矩的方法來(lái)降低管道中漿體水擊的危害日本免费特级淫片。

Power and mechanical engineering ; flow characteristic ; numerical simulation ; high pressure steam valve ; qualitative analysis

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Experiments show that numerical simulation and experimental results are consistent, providing an effective analysis for spot welding on aluminum alloy.

試驗(yàn)驗(yàn)證表明日韩美欧精品人妻，數(shù)值模擬和試驗(yàn)結(jié)果吻合良好91手机视频在线，為鋁合金點(diǎn)焊基礎(chǔ)理論研究提供了種有效的分析手段。

Through the numerical simulation analysis, the stress concentrationstatus before the crack splits has been researched, and the have been found. Therelationships between fracture splitting force 玩弄老太婆高潮视频、 factor and opening angle,curvature radius午夜欧美黄色、the depth of crackle groove have been carried out.

通過數(shù)值模擬，分析了應(yīng)力集中程度日韩人妻A级毛片，得出了預(yù)制裂解槽張角、曲率半徑国产黄色孕妇网站、槽深對(duì)裂解力及幾何形狀因子的影響曲線国产一级精品在线播放。

It is important to reduce the span of the hard roof to avoid its impact load on supports. However, at longwall top coal caving face, the periodical weight of roof is a main factor that crushes the top coal, which is beneficial to the top coal recovery. How to use the roof pressure safely is of crucial importance in top coal caving. Based on field monitoring, theoretical analysis of strata movement, the numerical model of compound structure of hard roof stepped cantilever and the top coal cantilever beam is built, and the parameters of the model are also determined. The elasto-plastic finite element method is used to analyze the effect of hard coal fracture under the abutment pressure of hard roof, and the cracking coefficient is defined according to the stress state of the element.

通過對(duì)巖層移動(dòng)的現(xiàn)場(chǎng)觀測(cè)，建立了&兩硬&條件綜放采場(chǎng)臺(tái)階懸臂—懸臂梁組合的煤巖組合結(jié)構(gòu)力學(xué)模型bbixx视频在线看，并以此煤巖結(jié)構(gòu)為基礎(chǔ)天堂在线黄色视频，建立&兩硬&條件綜放采場(chǎng)頂煤壓裂的有限元數(shù)值模型，分析了堅(jiān)硬頂板不同來(lái)壓步距對(duì)堅(jiān)硬頂煤的壓裂效應(yīng)人人操黄，并確定了合理的支架阻力日本黄在免一区在线，從而對(duì)堅(jiān)硬頂板進(jìn)行有效的控制，消除堅(jiān)硬項(xiàng)板對(duì)采場(chǎng)的沖擊隱患黄色3级毛，同時(shí)保證采場(chǎng)礦壓對(duì)堅(jiān)硬頂煤的有效壓裂一级AAAAAA毛片免费一级爱做片，達(dá)到提高頂煤回收率之目的国家a级黄片，由此形成了堅(jiān)硬頂煤、堅(jiān)硬頂板條件下綜放采場(chǎng)圍巖控制的基本理論和方法国产淫荡妇女av。

Through further numerical calculations and analysis, the rule of influence on acoustic radiation with respect to certain structural parameters ,as well as with respect to those of sound-absorbing layers, are discussed in detail.

通過進(jìn)一步數(shù)值計(jì)算及分析国产美女网在线看，詳細(xì)討論了結(jié)構(gòu)及消聲瓦的各參數(shù)對(duì)遠(yuǎn)場(chǎng)聲輻射的影響規(guī)律。

Simulated results show that the model has a better analysis capacity on both time domain and frequency domain, and can also be used in other solar photo-thermal applications.2 Numerical simulation of road snow-melting processThe whole snow-melting process, including the idling process, the snow-melting process and the after-snow process, is simulated.

模擬結(jié)果表明啪啪啪啊啊黄色免费网站，該模型在時(shí)域和頻域都具有良好的分析能力caopo免费公开视频公开，而且可以推廣至其它有關(guān)的太陽(yáng)能光熱應(yīng)用領(lǐng)域。2道路融雪過程數(shù)值模擬在上述溫度場(chǎng)分析軟件基礎(chǔ)上中文字幕亚洲日韩，分別對(duì)待融過程专业偷拍熟女在公司里偷星图片、融雪過程和融后過程進(jìn)行了模擬研究。