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wind resistance 風(對運動)的阻力 (= air resistance)...

wind rose

Then a thorough analysis to the bias - magnetic of ppfc is made . the retraining effects of the main parameters ( include clamping capacitance c , output filter inductor lf , load r , the leakage inductor ls and source winding resistance r ) are studied under the conditions of different von , different ton and different winding parameters . then a conclusion can be drew , that the smaller lf and the bigger r are , the better the bias - magnetic is restrained and c has a best value to retrain the bias - magnetic 分別對管壓降不同,導通時間不同以及兩原邊繞組參數不一致(包括漏感、電阻、激磁電感三種情況)的情況下,主要參數(包括箝位電容c 、輸出濾波電感lf 、負載r 、原邊繞組漏感ls 、原邊繞組電阻r )對偏磁的抑制作用進行了仿真分析研究,得出lf越小, r越大時激磁磁勢偏移量ni越小, c在其他參數確定時對抑制偏磁有最優值等結論,為參數的優化設計提供了依據。

Drawback occurred in the classical vssmc can be alleviated in the proposed control scheme because of importing the eliminating chatterer . according to the control strategy put forward above , corresponding controller for abs is designed . quarter braking vehicle model with four dof ( including vertical and longitudinal motions of body as well as vertical and spin motions of wheel ) is built considering the effects of wind resistance , longitudinal inertia forces , the vertical dynamics associated with the suspen 總之,基于車輛動力學建模,提出并探索了幾種實用且具有高魯棒性的變結構、模糊控制策略在abs 、 asr及vdsc系統中的應用,而后開發了abs的ecu原形,采用實時硬件在環仿真技術,對三種模糊控制策略進行了性能模擬。

After discussing the mechanism of the wind acting on the structure and the parameter considered in the wind resistance design , the paper analyses the performance of the static load . the characteristic of structure deformation and the mechanic , the force direction in the structure are also specially analysed deeply 在探討了作用于結構上的風的產生機理和抗風設計中考慮的一些參數后,分析了雙塔結構的靜力性能,特別深入研究了結構在水平風荷載作用下傳力機理、力學特性和變形特點。

At present there are no complete design methods and the research of the wind resistance analysis is seldom seen in terms of the whole frame of the pipe belt conveyor in china because of the individual characteristics of its structure . the pipe belt conveyor studied in this paper is used in coastal areas . therefore , the adaptable research for the wind load of the environment is of certain significance for the whole frame of the pipe belt conveyor 由于圓管帶式輸送機自身構造上的特殊性,目前在國內還沒有完整的設計計算方法,且將抗風分析應用于圓管帶式輸送機的整體機架結構的研究尚少見到,考慮到本文所研究的圓管帶式輸送機工作地處沿海地區,因此對圓管帶式輸送機整體機架進行環境風載荷適應性研究具有一定意義。

No corresponding provisions have been proposed to improve the capability of wind resistance by the optimization of construction configurations on the roof cladding in china . so to meet the design of wind resistance , the optimization of construction configurations on the roof cladding with low - rise buildings has a very important realistic significance 我國相關的規范規程對維護結構進行構造優化以提高結構的抗風性能并未提出相應的規定,因此對低矮房屋屋面結構進行構造優化以滿足抗風設計要求具有十分重要的現實意義。

Due to its novelty and beauty , good structural performance , strong spanning capacity , good wind resistance , safe construction and economy etc . , cable - stayed - suspension bridge is very suitable for the natural condition such as soft soil foundation , violent typhoon etc . , and becomes the most competitive bridge type in the super - long - span bridge system 摘要吊拉組合體系橋具有結構新穎、美觀、受力合理、跨越能力強、抗風性能好、施工安全和造價低等優點,在軟土地基和強風地區尤能突出其優越性,在超大跨橋型中極具競爭力。

The development of the cable - stayed suspension hybrid bridges in the world is reviewed , and the research on structural systems , computational theory and the mechanical performances including the static , dynamic and the wind resistance etc . are comprehensively investigated , and the future development trend is pointed out as well 概述了吊拉組合體系橋的國內外發展現狀,綜述了吊拉組合體系橋在結構體系、計算理論、力學性能包括靜力、動力和抗風性能等方面的研究進展,并指出了以后研究的主攻方向。

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算法結構的異同,并討論了原因,得出一些有意義的結論。

With the system complete assessement and testing , this system will meet the relevant national standards and technical requiments in wind resistance , waterpoof and condensation prevention , thermal insulation , sound absorbing and insulation , lighting protection and corrosion resistance 經綜合分析,全面測試和評估,系統抗風變形、放水防潮、保溫隔熱、隔聲吸音、防雷、防腐等性能均滿足國家相關規范和工程技術要求。

Wind hazard events in recent years show that in order to enhance the wind resistance of transmission lines , it is urgent for china to carry out study and risk assessment of wind hazards for transmission lines and to improve the wind resistant design for transmission towers 近年的風災數據昭示,開展我國輸電線路強風災害的研究和風險評估工作、改進輸電塔的抗風設計,是提高輸電線路風災防御能力的關鍵。

Aim at the shortcomings of traditional equation squared rood method of current , improved methods are presented . this papers presents the treatment of small ( or multiple ) power sources in distribution network and the loss calculation of transformer winding resistance 本文首先分析了目前國內外配電網線損計算的現狀和發展趨勢,并結合配電網結構和用電特點,建立了配電網元件線損計算的數學模型。

With reference to the relevant data of the construction catwalks once used for the completed suspension bridges , this paper gives a few comments on the problems having occurred and some of the experiences of wind resistance in the utilization of the catwalks 摘要在參閱已建成的懸索橋施工貓道資料的基礎上,就貓道在使用過程中出現的問題及抗風方面的一些經驗談幾點意見。

There are three factors to influence precision of the laser scanner , i . e . inertial of the shafting friction drag resistance of bearing and wind resistance introduced by irregular geometrical structure under operating at high speed 轉鏡式激光掃描器的負載主要有三個:一是軸系的慣性,二是軸承的摩擦阻力,三是軸系上的不規則物體的風阻。

Such a design features with clear distribution of force bearing , light weight , small wind resistance , installation conveniences , easy hold - up process and flexible realization of 29 combinations of transformation 具有受力明確,重量輕,風阻力小,安裝方便,扳起省力等優點,可方便地實現29種變形組合。

The leading car disturbs the air and does all of the work , the following car ( travelling in a nice pocket with almost no wind resistance ) is not inhibited and can build up speed faster than normally possible 前車驅趕走了空氣,后車在幾乎沒有空氣阻力的空洞里行駛,從而可能獲得比平常更快的速度。

Therefore , it is of vital importance in theory and engineering practice to do systematic researches on the methods of the wind resistance of large span roofs 因此對大跨屋蓋結構的抗風設計理論和方法進行系統研究,具有十分重要的理論意義和工程價值。

It helps in analysis to scribble on the schematic a resistor in series with the inductor or transformer whose value is the winding resistance 如果我們在繪制電路草圖的時候就添加一個電阻和電感串聯在一起,會是一個好辦法。

A dc - motor load ( the other application of these converter ) can be represented by a dc voltage in series with the motor winding resistance and inductance 直流電動機負載則可以表示為一個直流電壓與一個電感和電阻串聯。

Solution : not at all ! the balloons will add wind resistance and actually slow smitty down 解答疑團:一點也不是!氣球給斯密提增加了風的阻力,實際上減慢了他的速度。