Finally, the analysis results of assembly interference and assembly clearance show that the numerical models established have high degree of precision. That can be used as a reference for the profile of cutter and the virtual design of double-roller enveloping hourglass worm reducer.

最后的裝配干涉和裝配間隙分析結(jié)果表明91交换，建立的數(shù)字化模型精確度很高先锋视频资源在线，可以為加工蝸桿時(shí)刀具廓形的設(shè)計(jì)福利一区在线清纯，無側(cè)隙雙滾子包絡(luò)環(huán)面蝸桿減速器的虛擬設(shè)計(jì)等后續(xù)工作提供參考依據(jù)日韩A片无码毛片免费视频。

In this thesis, on the basis of theoretical analysis, numerical simulation and test study, the working principle and working process of central tube explosive ejection device and combustion gas ejection device equipped with star-shaped frame are analysed, the mathematical model of the inner ballstics of ejection devices and dynamical ejection model of submunition are established.

本文在理論分析、數(shù)值模擬與試驗(yàn)研究三者相結(jié)合的基礎(chǔ)上性色av无码一区二区，分析了中心管式爆炸拋撒裝置與星形框式燃?xì)鈷伻鲅b置的作用原理和作用過程国产乱交视频在线，建立了拋撒裝置內(nèi)彈道的數(shù)學(xué)物理模型以及子彈拋撒動(dòng)力學(xué)模型。

The distuibution of axial plane stubs and stub crossing points are non-uniform and quantity of them is not equal when the blade is made by using traditional design method of turbine. These are not benefit with calculating wood model and drawing. In this paper, to make blade wooden patterns is using blade mean camberline. This makes the wooden patterns meet the demand of the design and meet the shape of the runner blade. And this can agree with requirements of hydro and mechanical analysis and making the model of blade by using the numerical control machine. It has reference value to whole design of turbine.

針對(duì)傳統(tǒng)方法設(shè)計(jì)水輪機(jī)葉片時(shí)毛片三A级无码AV一区久久久，獲得的軸面截線和截線交點(diǎn)疏密不均亚欧美福利一区二区三区、個(gè)數(shù)不等、不利于葉片木模的計(jì)算和繪形的缺點(diǎn)杭州最疯狂一级毛片视频，文中利用葉片葉型骨線數(shù)值生成葉片木模圖最新自拍网站，使新的木模圖能夠更好的體現(xiàn)設(shè)計(jì)要求和符合實(shí)際轉(zhuǎn)輪葉片的形狀，并能滿足進(jìn)一步的水力和機(jī)械分析以及數(shù)控機(jī)床制作模型葉片的需要国产精品免费无码久久四虎，對(duì)水輪機(jī)的整體設(shè)計(jì)具有參考價(jià)值欧美亚洲国产老妇人在线。

This study is concentrated on the analysis of bird-strike resistance for a wing slat, through a numerical simulation by using commercial nonlinear finite element code PAM-CRASH.

本文以機(jī)翼前緣縫翼結(jié)構(gòu)為研究對(duì)象，通過大型非線性有限元分析軟件PAM-CRASH亚洲欧美激情小说，開展了飛機(jī)結(jié)構(gòu)的抗鳥撞仿真設(shè)計(jì)研究。

The finite strip method is a numerical approach developed in recent years and has found wide use in the analysis of prismatic thin—wall structures such as the box girders for cranes.

有限條法是近年來發(fā)展起來的一種數(shù)值分析方法玖玖在线黄色视频，特別適用于分析起重機(jī)箱形梁這樣的棱柱形薄壁結(jié)構(gòu)国产精品亚洲一区二区欧美激情。

Based on theory analysis and numerical calculations, some valuable conclusions are put forward, and some problems in early investigations are found out. Therefore, the results enrich the helical vortex theory and also clear the way from the helical vortex theory to its engineering application.

通過本文的理論分析和數(shù)值計(jì)算，獲得了一系列有價(jià)值的研究結(jié)果，完善了螺旋渦理論国产极品黄色，奠定了該理論工程應(yīng)用基礎(chǔ)免费人成在线观看网站可下载，同時(shí)發(fā)現(xiàn)并解決了早期研究中存在的若干問題。

The analysis shows that with given grid size higher accurate difference scheme can give higher resolutions with wider range of scales, or with given accuracy large grid size can be used for the higher accurate difference scheme. The second part is the numerical simulation of two-dimensional axisymmetric jet. The simulation results show the structure in the near field and the initial transition. In the near field, Kelvin-Helmholtz instability leads to the formation of vortex ring, and nonlinear growth leads to the merging of vortex ring. This is the main instability form. Under the assumption of axisymmetry and two-dimensional computing conditions, the results are applicable only in the near field.

第二部分采用高精度的差分格式對(duì)二維軸對(duì)稱射流進(jìn)行了數(shù)值模擬可以免费在线观看的黄色视频的网站，模擬結(jié)果顯示了射流流場結(jié)構(gòu)和渦結(jié)構(gòu)的發(fā)展過程久久精品亚洲精品无码金，在射流流場近區(qū)，K-H失穩(wěn)導(dǎo)致渦環(huán)的產(chǎn)生以及非線性效應(yīng)的增長導(dǎo)致渦環(huán)的對(duì)并是射流失穩(wěn)的主要形式91免费a视频；分析指出在軸對(duì)稱假設(shè)下的射流數(shù)值模擬只適用于射流近區(qū)的分析性欧美69式XXXX按摩。

This paper presents a quantitative analysis method of fissure volume density through strain energy obtained from numerical simulation.

選用裂縫體積密度作為構(gòu)造裂縫定量化參數(shù)，對(duì)基于鉆井巖心的裂縫體積密度的計(jì)算方法作了改進(jìn)插一插视频。

In the meantime, the temperature of the bus under natural cooling condition is computed by numerical calculation. If the temperature does not meet the requirement, the two schemes of forced ventilation are posed and compared. At last, the ventilating fan is selected on the basis of analysis.

針對(duì)垂直布置的母線進(jìn)行了詳細(xì)分析成年人网站大全，建立了垂直布置的母線的傳熱模型，確定了計(jì)算母線殼體溫度和導(dǎo)體溫度的數(shù)值計(jì)算方法亚洲国产精品色一区二区三区色牛，并根據(jù)所得結(jié)果提出了在工程應(yīng)用中可以采用的垂直布置的母線散通風(fēng)方案国产成本人h动漫无码亚洲3D。

This paper briefly introduces constitutes and application of numerical simulation analysis system of gas dynamic performance for marine turbine s inlet valve box .

概要介紹了船用汽輪機(jī)進(jìn)汽閥箱氣動(dòng)性能的數(shù)值模擬分析系統(tǒng)的構(gòu)成及其應(yīng)用。