脈動荷載 的英文怎麼說
中文拼音 [màidònghézǎi]
脈動荷載
英文
fluctuating load-
The characteristics of high pressure gyratory sprayed pumping discusses is presented, which is applicable in wide range of scope and ground layers, convenient for construction, long durability, wide source of materials. mechanism for subgrade strengthening : complex foundation of cement solid and earth between piles was formed by pulsant load of flowing pressure and spraying flow, water wallop, cavitation phenomenon, water wedge effect, extrusion force and air flow agitation etc so as to enhance foundation bearing force and reduce settlement and deformation
高壓旋噴注漿技術具有適用范圍、適用地層較廣，施工方便，耐久性好，材料廣闊等特點；其加固地基機理主要是通過流動壓、噴射流的脈動負荷、水塊的沖擊力、空穴現象、水楔效應、擠壓力、氣流攪動等效應形成水泥固結體與樁間土的復合地基，從而提高地基承載力，減少沉降變形。And gave priority to the eular - bernonulli beam model, the simply and convenient analytical resolution for the response of the pipelines under dynamical traffic loads through the impulse function and the congruence method of the vibration form and so on. during the analysis of the chanmical results of the pipelines, the randomicity of the output of the pipelines response was taken into accout. so the stochastic process method was applied to describe the probability characters of the pipelines response, which made the results truer, more veracious
本文採用eular - bernonulli梁模型和tomosimko梁模型對動力下kelvin粘彈性地基中管道固有振動性狀進行了分析，提出了各力學結果描述的解析式；並以eular - bernonulli梁模型為主，基於脈沖函數、振型迭加法等對管道在動力交通荷載作用下的管道響應問題提出簡單便捷的解析演算法；在管道受力結果的分析中，考慮管道響應輸出的隨機性，將管道響應用隨機過程來描述其概率特徵，使得結果描述更加真實準確。In chapter 3, the subgrid eddy - viscosity model for large eddy simulation is applied to calculate the three dimensions unsteady periodic turbulent flow in yantan francis turbine. the pulsating characteristics of some main physical parameters in flow field are found. the calculated axial water thrust of hydraulic turbine agrees with the model - test value
第三章採用大渦模擬亞格子渦粘模型，對巖灘混流式水輪機的流場進行三維非定常湍流分析，得到了流場中各物理量的脈動特性，計算出ms的軸向水推力與模型試驗值大小相當；同時論證了對于下機架承重的混流式水輪發電機組可採用其推力軸承負荷作為水電站廠房振動的最大垂直激振荷載。Simulation of fluctuating wind load on high rise tower and analysis of wind - induced vibration response
高聳鋼塔結構的脈動風荷載模擬及結構風振響應分析Along - wind loading is digitally simulated with the aid of random vibration theory and used as load input of dynamic analysis of wind - excited tower
本文利用隨機振動理論模擬了合肥電視塔的順風向脈動風荷載，並進行了合肥電視塔的風振反應分析。According to the fluctuating property of wind, on the stochastic vibration finite element theory, some calculation formulas of the response, including the along - wind response and the across - wind response, are obtained, the ideology of the torsion vibration in the double - tower structure and the ideology of the double - tower structure ' s dynamical wind load are also put forward at the same time. by using the stochastic vibration module of the general finite element program, the paper analyses the performance of the wind resistance more deeply and fully, discussing the influence on the double - tower structure from the diversification of the different component. the variance law of dynamic displacement and wind - induced vibration coefficient is derived through analyzing structure stochastic vibration, so is the effect of several parameters on dynamic displacement, acceleration and wind - induced vibration coefficient
從結構風振的基本理論出發，通過對脈動風功率譜的分析，推導了結構風振響應（順、橫風向）的計算公式，同時提出了雙塔結構的扭轉振動和動力風荷載計算的思想，在結合通用有限元程序的隨機振動模塊的情況下，對雙塔結構的抗風性能作了深入、全面研究，探討了雙塔結構構件截面的變化對其抗風性能的影響，同時探討了順風向風速譜的選取、風速、參與計算的振型數、風與結構耦合作用是否考慮等因素對分析結果的影響，比較了規范風振系數的計算與隨機演算法結構的異同，並討論了原因，得出一些有意義的結論。In this paper, the wind loading time history of the truss structure is simulated according to the data of wind tunnel experiment and pulsating wind spectrum, and the transient dynamic analysis is used on the fem
本文依據風洞試驗數據模擬了靜風壓的空間分佈，依據脈動風譜模擬了網架結構的風荷載時程，並對有限元模型進行了有限元瞬態動力學時程分析。Finally the wind - induced dynamic responses of suspension cables are discussed and a typical numerical example is presented. in this dynamic analysis the fluctuating wind - load function modeled from a certain wind speed spectrum is taken as the dynamic loading
最後進行了懸索的風振響應分析，採用了由脈動風速譜模擬得到的脈動風荷載，並對一典型懸索在不同脈動風譜下的振動響應進行了實例計算。In the process of building and using the mass concrete structures, because of the effect of out - side condition and themselves, some faults will form in the structure, these faults will effect the bearing capability and endurance using nondestructive testing method to test the concrete ' s quality and diagnose its healthy, which has the significant sense in assessing the safety stability and research of the administering diseases this dissertation mostly researched the testing methods in the mass concrete structure, discussed the principles, methods, features, sphere of application of the ultrasonic testing in the mass concrete structure with faults, used dynamic fem to simulate the testing process, discussed when the concrete structure with cracks is under the effect of the pulse, how the elastic waves propagate and what are their changing feature, researched the principles of the first - arriving waves " phase when the cracks " depths are not same, obtained the relation between the inversion point and the cracks " depth, which has the direction sense in the application of projects, the second part of this dissertation is ct, which used the ultrasonic wave running through the tested - substance to get arriving - time of the ultrasonic wave, then inverse the image this dissertation drawed one ct program which can well present the different little cells " ultrasonic wave velocity profiles of the substance, thereby to diagnose the quality of the part of the tested - substance, ct has the better using foreground.
在混凝土結構的施工及使用過程中，由於受其自身及外界各種因素的影響，常常會產生一些缺陷，對結構物的承載能力和耐久性造成嚴重影響，採用無損檢測技術進行質量檢測和健康診斷，這對混凝土結構開展安全、穩定性評估以及病害隱患治理研究具有重要意義。本論文主要針對大體積混凝土結構缺陷的檢測方法展開研究工作，重點討論了超聲波法檢測混凝土結構裂縫的基本原理和方法及其特點、適用范圍，運用動力有限元數值模擬其檢測過程，探討了有裂縫缺陷的混凝土結構在脈沖荷載作用下彈性波的傳播及其變化特徵，研究了不同裂縫深度下首波相位變化規律，得出了反轉臨界點與裂縫深度之間的關系，這對實際工程應用具有指導意義。聲波ct是一種新的無損檢測技術，它是利用聲波穿透被檢測體獲取聲波接收時間，來進行計算機反演成像的技術。This paper selects the pulsating wind power density spectrum of davenport and simulates the wind speed time series and the wind load time by matlab. considering the vertical and horizontal correlation of the pulsating wind, the study make use of the time domain analysis of buffeting to carry out the transient dynamic analysis of the whole frame structure which is loaded by the random pulsating wind load. finally, in terms of the whole frame of the pipe belt conveyor, the evaluation for
選取davenport脈動風功率譜，利用matlab模擬脈動風的風速時程曲線和風荷載時程曲線，並考慮脈動風的空間豎向和側向相關性，利用抖振時域法對整體機架結構進行隨機脈動風壓作用下的瞬態動力學分析，最後再對圓管帶式輸送機整體機架結構對環境風荷載的適應性做出評價。By employing cole ' s classical theory of bubble dynamics, the motion of bubble produced by the underwater explosion and the corresponding bubble pulsating pressure are calculated. a profile function of the shock wave and its parameters are determined according to the principle of wave profile similitude and the equality of impulses. finally an analytic formula is derived to simulate the whole time history of the pressure from the front shock wave to the bubble pulsation, representing the fluid loadings of the underwater explosion
木文首先應用庫爾的經典水下爆炸氣泡運動理論計算出氣泡的運動和脈動的壓力波形，再依據波形相似的原則尋找波形模擬函數，用沖量相等的原則確定波形參數，得出了從沖擊波到氣泡脈動壓力整個過程對水下爆炸載荷進行模擬的解析公式。Besides, the properties of fibers carrying at different parts of the vascular prostheses differ greatly. it is predictable that the deterioration of prosthesis, under the physiological loads ( periodical pulse blood pressure etc. ), could happen firstly in the weaker zone in vivo. the deterioration shortens the life of vascular prosthesis
另外同一工序但處於人造血管不同部位的纖維的各項承載性能也存在較大差異，可以預測人造血管在體內承受反復脈動等生理負荷下，破損可能首先出現在相對薄弱的部位，縮短了人造血管的使用壽命。The analysis is relatively simple due to the good approximation and the compact expression of the spline function
由於樣條函數有良好的逼近性及緊湊性，使得層合板在脈動流這種復雜荷載作用下的動力分析也相對簡單。In this paper, a simplified method of calculating wind - induced response and design loads of super - high - rise buildings was proposed. coherence properties of wind load on typical tall building were analyzed and the results show that cross - wind loads at different height have strong coherence at vertex shedding frequency, and the coherence function ' s value here is near to 1
首先分析了各測點層合力的相干特性，結果顯示各測點層所受順風向風荷載之間的相干函數基本成單調衰減規律，而橫風向脈動風荷載在漩渦脫落頻率處存在和順風向不同的顯著相關性。Based on the transform of coordinate and principle of superposition, a generalized integral formula dealing with moving load problem is established. an impulse response function used in the integral is obtained by means of laplace and hankel transform
在論文中，基於線性系統的疊加原理和坐標變換，建立了求解移動荷載作用下粘彈性地基板的動力響應積分公式，把運動荷載問題轉化為獲取位移脈沖響應函數。The paper puts forward an eccentric speed - regulating pulse - type stepless transmission and introduces its work principle. by analyzing motion and dynamics of new pulse - type stepless transmission, workout responsible
根據平面四桿機構等效轉動慣量的計算公式，計算了該變速器的等效轉動慣量，計算了等效轉動慣量的變化率? ?脈動度，分析了動載荷的影響。Then the concept of complex multiple tuned mass dampers is presented on the basis of calculating results. secondly, as a result of deducing formulas systematically and making programs to analyze with the software named matlab, the complex multiple tuned mass dampers are obviously more effective in comparison with multiple tuned mass dampers for suppressing vibration of struc tures
其次，經過系統地公式推導和matlab編程模擬計算，繪出被控高聳結構在脈動風荷載激勵下，安裝mtmd和安裝復合mtmd后關鍵部分質點的位移均方響應譜，通過對兩種情況下位移均方響應譜的比較，證明了復合mtmd的減振效果明顯優于傳統mtmd振動控制裝置。Pedestrian level wind concerns are also addressed, in this paper, the wind pressure distribution on the surface of yingli building in chongqing is introduced. a wind tunnel test of yingli building rigid model is investigated in beijing university environment wind tunnel laboratory
並以興建於重慶市的重慶英利大廈為對象，在北京大學環境學院環境風洞實驗室進行風洞試驗，系統地研究了該建築外表面平均風壓分佈和脈動風壓分佈特性，給出了可用於設計的風荷載值，以確保大樓的安全性與穩定性。The motion equation of a high - rising structure subjected to fluctuating wind load is developed, with the consideration of soil - pile - structure interaction
摘要本文推導了考慮樁土結構動力相互作用時高層建築在脈動風荷載作用下的運動方程。Random wind load simulation for large - span spatial structures based on artificial neural networks
基於神經網路的大跨空間結構脈動風荷載的隨機模擬分享友人