In view of bearing capacity of the elastoplastic theory analysis, the author made a comparison between the achieved bearing capacity limit load pi / 4 of round base ( space problem ) and the limit load pi / 4 of bar groundwork foundation design ( plane problem ) from soil mechanics at home and abroad as well as foundation criterion, and explained why the value of formula in present design criterion from soil mechanics is inclined to be conservative. in the light of the author ' s many years experience of vibration test on the spot and the research work of relevant projects, the author worked over the dynamic pile testing of the bearing capacity of foundation and batholith, and gathered the parameter of dynamic analysis and testing. the author also talked over the difficult point of pile foundation design criteria in present batholith engineering world, i. e. the confirmation of batholith bearing capacity of pile end, from the following aspects : a ) confirmation of single axis counter - pressure strength of rock in house ; b ) f. e. m calculation of elastoplastic model ; c ) calculation of soil mechanics ; d ) deep well load test
然後,對巖土工程領域至今尚未解決,甚至不為人注意的考慮地基變形的地基承載力問題進行了實用化的探討,提出了考慮地基變形的地基承載力上程計算方法;對基於彈塑性理論分析的地基承載力國內尚未見報道的空間問題得到了圓形基礎(空間問題)的承載力界限
荷載p _ ( 1 / 4 ) ,並與國內外土力學專著及地基基礎設計規范中的條形基礎(平面問題)的界限
荷載p _ ( 1 / 4 ) ,進行了對比,從而定量上解釋了目前設計規范引用土力學承載力公式值偏於保守的這一情況;根據本文作者多年從事現場地基工程振
動試驗及相關課題的研究工作,本文以截頭錐模型模擬地基,對地基(巖基)承載力的
動測法進行了研究,為各類地基(包括巖基) ,匯總了
動力分析和檢測川的參數:針對日前巖土工程界應用樁基設計規范中的難點? ?樁端巖基承載力的確定問題,從巖石室內單軸抗壓強度確定、基於彈塑性模型的有限單元法計算、土力學計算及深斤載
荷試驗四方面進行了深入討論;本文作者根據多年現場載
荷試驗的工程實踐,對深井
荷試驗裝置的核心部分? ?反力裝置,設計了側壁支撐反力加載系統,該加載系統具有實用、簡便、穩定及安個等優點。
Also a refined - pulp quality predictive model, with specific energy, specific load as the model inputs, and beating degree, wet weight as the model outputs, is presented. simulation results show that the models can be acted as theoretical bases for the automatic control of high - consistence pulp refining process
即,建立了以原漿流量、白水流量、盤磨機功率為輸入變量,比能量、比負
荷、濃縮機漿位為輸出變量的
動態模型,以及基於比能量、比負
荷的成漿質量預報模型。
The scielltific computational theories and methods on bird strike to the windshield of aircraft have been systematically studied and summed up in this thesis, such as fem comptltational principles and procedures to elastic dynamic problems under the conditions of small and non - linear finite deformation, 3d viscous elastic constitutive theory and incremelltal expression under the consideration of the rate effect of non - metallic materials like the aircraft windshield, and the numerical compatational principles and key constitutions for impact - contact dynamic subjects
2 、系統學習並歸納總結了鳥體撞擊風擋結構問題中的科學計算理論與計算方法。按照鳥撞問題數值計算方法逐步深入的思路,系統總結了小變形結構
動力學有限元數值計算方法、有限變形的幾何非線性有限元數值計算方法、粘彈性體非線性形變的本構物理關系;對于實施復雜結構有限元
動力學計算的載
荷增量方法提出了對newmark差分的改進以及進行材料與幾何非線性數值計算的細致步驟。
Engine load simulated control system was consisted of two unattached parts of work resistance simulated control subsystem and electric bow wave dynamometer control subsystem. with the mathematic models of engine load simulation controller, which transferred the work resistance ' s change to engine load change immediately, the system can met the need of the simulation control system
發
動機負
荷模擬加載控制系統包括彼此獨立的作業阻力模擬控制子系統和電渦流測功機控制子系統兩部分,應用發
動機負
荷模擬控制器數學模型,使作業阻力的變化及時轉換為發
動機負
荷的變化,能夠滿足模擬系統的控制要求。
Cohesive models furnish a complete theory of fracture that is not limited by any consideration of material behavior, finite kinematics, non - proportional loading, dynamics, or the geometry of the specimen
內聚模型作為一個完全的斷裂理論,不被任何材料特性、有限運
動、非比例載
荷、
動力學或是試件的幾何尺寸所限制。
Transportation loads - measurement and evaluation of dynamic mechanical loads - part 5 : derivation of test specifications
運輸載
荷.
動力機械載
荷的測量和評價.第5部分:試驗規
Transportation loads - data collection of dynamic mechanical loads - part 2 : collection of data
運輸載
荷.
動態機械載
荷的數據收集.第2部分:數據收集
Transportation loads - data collection of dynamic mechanical loads - part 1 : principles and survey on structure of the standards
運輸載
荷.
動態機械載
荷的數據收集.第1部分:標準結構
Influence of thickness on charge storage and dynamic properties of non - polar film electrets
厚度對非極性聚合物薄膜駐極體電
荷儲存及電
荷動態特性的影響
Feather and down. determination of the permanent deformation after dynamic fatigue stress under constant load
羽毛和羽絨.恆定負
荷動態疲勞應力下永久變形的測定
Thus it decreases the collision and then improves the performance of the network. simulation results show that fa _ maca outperforms several known multiple access protocols using traditional network access delay algorithms
該協議在原有maca協議的基礎上,考慮了網路中不同優先級業務對接入時延的要求,並且可以根據網路當前的業務負
荷動態的選擇控制參數,從而從整體上改善了網路的性能。
Transportation loads - measurement and evaluation of dynamic mechanical loads - part 4 : data evaluation
運輸載
荷.
動力機械載
荷的測量和評價.第4部分:數據評
Transportation loads - measurement and evaluation of dynamic mechanical loads - part 1 : general requirements
運輸載荷.動力機械載荷的測量和評價.第1部分:一般要