After briefly reviewing the references concerning dynamic substructure techniques and semi-analytical ring element, for shells of revolution the thesis mainly present the modelling and numerical analysis of strap-on carrier rocket done by auther

本論文在對(duì)與本課題有關(guān)的動(dòng)力子結(jié)構(gòu)技術(shù)和回轉(zhuǎn)殼半解析環(huán)元的國內(nèi)外研究現(xiàn)狀作了簡(jiǎn)單綜述之后尹人综合日本在线www官网，主要介紹了作者所完成的下列工作

Numerical analysis of pre-forming process design is proposed in hydroforming automobile subframe.

對(duì)汽車副架液壓脹形預(yù)成形工藝設(shè)計(jì)進(jìn)行了數(shù)值模擬研究激情综合网www。

In this dissertation, periodic impact motions in vibro-impact systems are studied, and the existence and stability of superharmonic periodic impact motions are obtained. The critical bifurcation parameter intervals of superharmonic periodic impact motions are deduced, and numerical simulations are used to verify the results.

中文題名碰振或約束系統(tǒng)的全局分析及穩(wěn)定性研究副題名外文題名 Studies on global analysis and stability in vibro-impact or constraint systems 論文作者張彥梅導(dǎo)師陸啟韶教授學(xué)科專業(yè)一般力學(xué)與力學(xué)基礎(chǔ)研究領(lǐng)域\研究方向?qū)W位級(jí)別博士學(xué)位授予單位北京航空航天大學(xué)學(xué)位授予日期2002 論文頁碼總數(shù)95頁關(guān)鍵詞碰振系統(tǒng)轉(zhuǎn)子系統(tǒng)多體系統(tǒng)碰撞振動(dòng)館藏號(hào)BSLW /2003 /O322 /1 本論文討論了碰撞振動(dòng)系統(tǒng)的周期碰撞運(yùn)動(dòng)18分钟处破之好疼在线观看，得到了超諧周期碰撞運(yùn)動(dòng)的存在性和穩(wěn)定性免费日韩A级片，推導(dǎo)出亞諧周期運(yùn)動(dòng)的臨界分岔參數(shù)區(qū)間一本大道无码日韩精品影视丶，并利用數(shù)值模擬進(jìn)行驗(yàn)證乱人伦中文视频在线香蕉。

In Particular, the tangent stiffness matrix in the incremental relation becomes symmetric, ensuring the efficiency in the numerical analysis, whereas the integrated constitutive relation serves as a guide, ensuring the convergence on the physically feasible stress strain relation.

值得一提得是，增量本構(gòu)方程中的切線勁度矩陣是對(duì)稱的亚洲国产一区二区三区，使得在進(jìn)行數(shù)值分析時(shí)十分有效免费偷拍精品视频。而全量本構(gòu)方程作為確保實(shí)際可行的應(yīng)力應(yīng)變滯回圈收斂的向?qū)А?/p>

In the method of numerical analysis, the spatial part of equation system in strong conservation form is first discretized by conventional central finite-difference approximation and then the system of partial differential equations becomes a system of ordinary difference equations.

本文所建數(shù)值方法的基本空間離散格式是中心差分，并用源于Jameson的標(biāo)量耗散模型抑制數(shù)值波動(dòng)xxxxx日韩；采用經(jīng)典四階龍格—庫塔法積分經(jīng)過空間離散后得到的常微分方程組當(dāng)殘差足夠小時(shí)的解為穩(wěn)態(tài)解欧美一级性爱黄片。

Through the design of AGP-test equipments and methods which could simulate the impact of input of exogenous nutrients on eutrophication, the evolution of algae and aquatic species extinction process in Miyun Reservoir under different environmental and nutritional conditions are simulated. Then the ratio growth rate in the three simulation stages are simulated and analyzed combining the numerical analysis software MATLAB 7.0. At last, the conclusion that in the three designed stage, the total phosphorus threshold which leads to a water bloom in Miyun is respctively 0.053mg/L, 0.062mg/L, 0.064 mg/L is educed. Based on the regression relationship of total phosphorus,chlorophyll-a, total nitrogen, and the transparency,we compartmentalized the evaluation standard level of eutrophication in Miyun Reservoir.

通過設(shè)計(jì)模擬外源輸入對(duì)富營養(yǎng)化作用的AGP試驗(yàn)裝置和方法，模擬了不同環(huán)境條件国产激情毛片基地、營養(yǎng)條件下密云水庫優(yōu)勢(shì)藻種演變和富營養(yǎng)化過程免费看国产黄色网站，結(jié)合使用MATLAB 7.0數(shù)值分析軟件，對(duì)3期模擬時(shí)段的比增長(zhǎng)率進(jìn)行擬合分析亚洲v欧美v国产v在线观看，得出3期設(shè)計(jì)階段密云富營養(yǎng)化發(fā)生的總磷閾值為0.053mg/Lsindy1681、0.062 mg/L、0.064 mg/L日韩自拍精品在线视频观看，再根據(jù)總磷與葉綠素a老色鬼在线视频一区二区、總氮国产一级一级A片、透明度之間的回歸關(guān)系，劃分了密云水庫富營養(yǎng)化的評(píng)價(jià)標(biāo)準(zhǔn)級(jí)別性欧美人妖猛交。

The problem of transient displacement response is solved by the method of finite element numerical analysis.

在自主研究開發(fā)的結(jié)構(gòu)有限元分析與優(yōu)化設(shè)計(jì)軟件一JIFEX中實(shí)現(xiàn)了上述方法77777免费毛片。

To make use of finite element method, the field of electromagnetic wave propagating in trapezium tunnel was studied. The attenuation rate and its numerical analysis were deduced on the foundation of tiny-intervene method and the calculating program was also compiled.

應(yīng)用有限元方法研究了梯形隧道中的波導(dǎo)場(chǎng)問題，并以微擾法為基礎(chǔ)推導(dǎo)了波模衰減率的計(jì)算公式欧美成年男女免费性爱视频，編制了計(jì)算程序中文字幕视频在线。

Trapezoidal algorithm for the numerical analysis of the code, provided to you reference.

詳細(xì)說明：梯形算法，用于數(shù)值分析中的代碼美女被操网站免费，提供給各位參考真人性囗交高清视频免费。

VC prepared by the numerical analysis inside the triangular matrix algorithm, I have read several certification.

用VC編寫的數(shù)值分析里面三角矩陣的算法，本人已經(jīng)經(jīng)過多次驗(yàn)證日韩变态福利网站在线观看。