A study of dynamical parameters of ganymede 木衛(wèi)三的動力學(xué)參數(shù)
Relation between systematic dynamical parameter and mechanics is got known . 5 . the prediction model and algorithm of limitation load of pile hammer is put forword using grey system theory 利用灰色系統(tǒng)理論給出樁極限承載力的預(yù)測模型和算法,并得出五個主要參數(shù)對樁極限承載力關(guān)聯(lián)性強弱關(guān)系。
This technique is characteristic of high precision, fast, fault-tolerant, none limiting by the structure model etc . and the identification of the dynamical parameter of linear structure base on nn is feasible, too 最后得出結(jié)論,神經(jīng)網(wǎng)絡(luò)應(yīng)用于結(jié)構(gòu)地震反應(yīng)仿真是切實可行的,具有精度高、速度快、容錯性強、不受結(jié)構(gòu)模型限制等優(yōu)勢。并且基于神經(jīng)網(wǎng)絡(luò)的結(jié)構(gòu)參數(shù)識別是可行的。
It brings forward the methods for identification of the dynamical parameter of linear structure base on nn and analyses some calculating examples, too . finally, it concludes that it is feasible that nn is applied to the simulation of seismic resistant structure 對基于神經(jīng)網(wǎng)絡(luò)進行線性結(jié)構(gòu)動力參數(shù)識別進行了一些初步的探索和研究,提出了基本的思路和方法,并進行了算例分析。
According to the pavement structure dynamical analyze theory, the principle and process of the pavement modulus back-calculation have been discussed . the appliance ideas of the dynamical modulus among the pavement evaluation, the dynamical characteristic and correlative dynamical parameters of the cement concrete pavement surface, basement and subsoil have been investigated, and the contrast relationships between dynamical and static modulus of the cement concrete pavement have been established, and the evaluation standard of the structure layers " dynamical modulus of the cement concrete pavement has also been presented 根據(jù)路面結(jié)構(gòu)動力分析理論,對路面模量反算的原理及實現(xiàn)過程進行論述,研討了動態(tài)模量在路面評價中的應(yīng)用思想及水泥混凝土路面面層、基層、土基的動態(tài)特性和相關(guān)的動力參數(shù),建立了水泥混凝土路面動態(tài)模量與靜態(tài)模量的對比關(guān)系,提出了水泥混凝土路面各結(jié)構(gòu)層動態(tài)模量的評價標(biāo)準(zhǔn)。
The dynamical parameter was regarded as evaluation guideline, and through investigating the change characteristic of the basin and modulus under different destroy boards, different area and different level loads, the identify methods of the pavement bursted have been given and we advise to use synthesize modulus ratio to evaluate the pass-loads capacity of the joints . we have also discussed the influence of different level loads to the joints pass-loads capability, and confirmed the commonness and oneness of the influence of the pass-loads and bursted to the basin and modulus under the critical loads, and the range of the critical loads was also given . basing on the determination of the pass-loads a 以動態(tài)參數(shù)作為評價指標(biāo),通過研討不同破壞板的不同區(qū)域,在不同等級荷載作用下彎沉、模量的變化特性,提出了路面脫空識別辦法以及利用綜合模量比來評價接縫傳荷能力的思想,探討了不同等級荷載對接縫傳荷能力的影響特性,確定了臨界荷載下傳荷與脫空對彎沉、模量影響的共性和單一性,并確定了臨界荷載的范圍,在判定脫空和傳荷基礎(chǔ)上提出了水泥混凝土路面的壓漿效果的評價方法,通過研討荷載與動態(tài)模量的關(guān)系,對地基的動態(tài)性能進行了系統(tǒng)的分析與評價。
At the same time, the character of dynamical parameter under dynamical loads was taken into accout, so elastic eular-bernonulli foundation beam model under traffic loads was set up . in this model, firstly, the detailed resolution process accounting the parameters changing with the space was gained; secondly, the detailed resolution process accounting the parameters changing with the time was gained, too 同時,建立了考慮管-土系統(tǒng)參數(shù)在動力下存在動態(tài)變化特點的交通荷載下管道的eular-bernoulli地基梁受力模型,分別對參數(shù)隨著空間和空間變化時的位移響應(yīng)提出了詳細的解析求解過程,從而保證了管土系統(tǒng)在動力下參數(shù)隨時空動態(tài)變化條件下解析求解方法的科學(xué)性與完備性。
The key items influent on the characteristics of spraying have been also studied in the dissertation, we can get a good spraying result by adjusting the related parameters efficiently . ( 3 ) the theoretical model of the dynamical parameters such as temperature, moisture, pressure and contour for hot medium and particle inside the drying chamber were obtained by model, utilized the computational fluid dynamics technique to solve the problem between spraying droplets medium by arranging the double grid dispersing structure and rotary outlet structure and the developed structure improved the drying efficiency and product quality (3)采用-模型實現(xiàn)了壓力噴霧干燥塔的溫度場、濕度場、流場的理論建模,利用計算流體力學(xué)(cfd)技術(shù)來解決噴霧干燥過程中熱介質(zhì)與霧滴間的傳熱傳質(zhì)以及動量傳遞和湍流擾動等問題,避免了干燥過程中的設(shè)計不合理狀況;通過增加雙格柵均風(fēng)裝置和旋轉(zhuǎn)出風(fēng)裝置,改善了干燥塔內(nèi)的熱質(zhì)傳遞,提高了干燥塔的體積蒸發(fā)強度。