船體應力 的英文怎麼說
中文拼音 [chuántǐyīnglì]
船體應力
英文
body stress-
The plating in ships is generally subjected to combined in - plane and lateral pressure loads. in - plane loads include biaxial compression / tension and in - plane bending and edge shear, which are mainly induced by overall hull girder bending and / or torsion of the vessel. lateral pressure loads are due to water pressure and cargo
面內載荷分為軸向壓應力或拉應力、邊緣剪切應力以及面內軸向彎曲應力。實際的船舶結構中面內載荷通常由船體梁的總縱彎曲或者船體梁的扭轉引起。側向壓應力則由水壓力和貨物壓力引起。This method applies the extended strip theory to establish the nonlinear ship motion equations in regular head seas, obtains stable time course by resolving in time domain, and then pressure vectors will be available. the pressure includes static pressure, incident waves pressure, diffraction pressure, radiation pressure, and wave impact pressure, and changed with instantaneous draft of each intersection
該方法應用擴展的切片理論建立迎浪規則波中船舶非線性運動方程,通過時域步進求解獲得船舶剛體運動的穩定時歷,進而給出與船體各橫剖面瞬時吃水相對應的靜水壓力變化、入射波壓力、繞射壓力、輻射壓力和波浪沖擊壓力諸分量。At present, more and more large tonnage ships are built with the development of ship industry, the force between hull and shipway increased, the damage of ship structure was also reported. but the existed method is not efficiently for calculating the distribution of force acted on forward during stern floating which is the moment of truth during ship launching, so it is important to calculate ship launching precisely and take measure to preclude such accident
目前隨著船舶工業的發展,建造船舶噸位越來越大,船體所受滑道反力隨之增大,在實際生產過程中已有船體局部結構不同程度損壞的報道,而現有的下水計算方法在下水的最危險時刻艉浮時滑道反力的分佈情況方面的計算顯得不夠準確,如何準確進行計算並採取相應的措施來防止這類問題發生顯得十分重要。In the hogging condition, double bottom and the side shell remain the ultimate bucking strength, deck and upperwing tank remain the yield stress, and the other parts keep elasticity. then the key to calculate the ultimate strength of ship hull girders is to ascertain the ultimate bucking strength of the stiffened panels. in this regard, the developed formulation is designed to be more sophisticated than previous simplified theoretical method for calculating the ultimate strength of stiffened panels under combined in - plane bending and lateral pressure. fabricatio n - related initial imperfections ( initial deflections and residual stresses ) are included in the panel ultimate strength calculation as parameters of influence. all possible collapse modes involed in collapse of stiffened panels, including overall buckling collapse, column or beam - column type collapse, tripping of stiffeners and local bukling of stiffened web are considered
確定了船體梁整體破壞時的剖面應力分佈之後,關鍵在於確定板架的極限屈曲強度。本文充分考慮了在縱向彎曲、橫向壓力作用下加筋板可能發生的幾種破壞模式,即板架的整體屈曲破壞、樑柱形式的破壞、筋的側傾、腹板的屈曲並同時考慮了初始焊接殘余應力、初撓度的影響,使其更精確的計算加筋板的屈曲強度。對于加筋板中加強筋腹板的局部屈曲,採用解析法推導出筋的腹板的撓度方程及其邊界條件,求解相應的方程,從而計算出腹板的局部屈曲應力。Reliability assessment of xi - luo - du underground water - power plant : the results have been used by the cheng - du surveying, design and research institute for the preliminary design ; ( 2 ) the stress and strain analysis for the xiao - guan - zi sluice and its foundation : the report has been applied for the reinforcement of the foundation ; ( 3 ) the thermal control procedure for the no. 7 - 14 power plant dam segments of the three gorge project : the research report provides the effective and efficient methods for the controlling of the temperature field in the mass concrete structure ; ( 4 ) the software system development for the long - term monitoring for dikes : the software can automatically give the results of the seepage field and the probability of soil piping of dikes and underground ; ( 5 ) reliability assessment of xiang - jia - ba underground water - power plant : the results have been used by the zhong - nan surveying, design and research institute for the preliminary design ; ( 6 ) fatigue reliability estimation of shipping berthing pillar : the results give the optimized design scheme and prediction of the structural age ; ( 7 ) 3 - d static and dynamic stochastic finite element analysis for the strength, stability and thermal control problem for xi - luo - du project
溪洛渡水電站超大型地下洞室群圍巖穩定的安全可靠性分析:被成都勘測設計研究院應用於比選報告及可行性論證中; ( 2 )小關子水電站攔河閘壩及地基的應力應變分析:被成都勘測設計研究院應用於地基加固處理方案; ( 3 )三峽廠房7 # - 14 #壩段溫控並縫措施研究:為廠房壩段並縫方案的可行性提供了依據; ( 4 )堤防工程體系的長期監控預報預警決策系統開發:為監控、預測預報堤防滲漏管涌破壞提供分析軟體; ( 5 )向家壩地下洞室群圍巖穩定的安全可靠性分析:被中南勘測設計研究院應用於初步設計方案中; ( 6 )靠船墩的疲勞可靠度研究:為廣東航運規劃設計院的靠船墩優化設計和加固提供依據; ( 7 )溪洛渡高拱壩壩體壩基(壩肩)強度和穩定的三維靜動力隨機有限元分析及可靠度計算:為溪洛渡重大工程壩體的靜動力安全穩定性及溫控方案提供依據。The project of the experimental and theoretic research on friction reduction by microbubbles for high - speed ships, supported by the national natural science foundation of china ( no. 19772050 ), aims to study the key technology of air - jetting devices and its relevant problems, theoretically predict the law of bubble diffusing in the boundary layer and calculate the friction of the hull
國家自然科學基金項目「高速氣泡船減阻試驗及理論研究」的目的在於研究高速氣泡船噴氣裝置的關鍵技術及其相關問題,並從理論上預測噴氣氣泡在船底邊界層的擴散規律和計算船體摩擦阻力,為將這一技術應用到實船上提供基礎。From this thesis, it can be stated that the use of observation implement and active cable can produce timely active control to ship in the wave. because active cable can enhance ship ' s ability of anti - siamming but do n ' t affect ship ' s inward capability, it should be given some attention in the application research of active control method in ship structure vibration by slamming
從本文中可以看出,將觀測器和作動器相結合可以對航行於波浪中的船舶結構振動實施適時的主動控制,並且裝上作動器不但不會影響船體本來的性能,而且可以增加其抗波浪砰擊能力,因此主動控制方法在船舶結構砰擊響應控制方面的應用和研究應該給予一定的重視。Aiming at the working condition and object of the 9gscc - 1. 4 sunken - plantharvesting equipment, resistances of ship body and cutting fram were analyzedby means of theory of hydromechanics and traction force of the chain - type convegor were done also by means ofcalculation of tension. power equation of the equipment, which relates to the implement ' s forward speed vm, chain - type convegor ' s linear velocity vs and cutting frame ' s angle of dip, was attained. this paper established a mathematical model for power consumption as objective function, based on thefundamental, structural dimensionof the equipment
本文根據9gscc - 1 . 4型水草收割機的工作原理及其主要結構尺寸,針對收割機的工作條件和工作對象的特性,應用流體力學理論分析計算船體及切割撿拾架的工作阻力,並用逐點張力法計算輸送鏈的牽引力,得出整機消耗功率與機組工作速度vm 、輸送鏈線速度vs及切割架入水角之間的關系式。The author ' s program can resolve the following problems : ultimate strength of hull girder, the panel ' s curve of stress - strain
作者的程序可解決如下問題:船體梁的極限承載能力以及加筋板單元的平均應力-應變關系曲線。The panels of hull girder may collapse or buckle before it reaches the yield stress. the curve of the stress - strain is usually constituted by stable zone -, non load - shedding zone and load - shedding zone
並且船體截面的組成單元(一般是加筋板單元)在達到材料屈服應力之前還可能發生多種形式的屈曲。In order to be better used in faults simulation and analysis, the accurate of model needs to be improved. the research of marine diesel engine generator system simulation includes modeling and simulation results " analysis. based on mechanism of the marine diesel engine power system, and according to the marine power system of yunhe vessel, this dissertation sets up a simulation model of yunhe generator system
由於船舶電力系統模型是輪機模擬器中電站部分的核心,為了使建立的模型精度更高,更具有系統故障模擬和分析的準確性,本文從船舶柴油發電機系統的機理出發,應用電力系統穩定性理論,結合雲河輪電力系統,在matlab軟體平臺上,建立了雲河輪柴油發電機系統的模型,並對該系統進行了模擬運行和分析。Then, made use of software ansys to calculate the strength of a catamaran ferry structure, applied the formulae deduced in chapter 3, selected reasonable restraint form, in the whole ship computing result further verified the formula then on the base of a model of the whole ship, used fea to study the hull connecting structure with the limit of strength, deduced the useful assumption for after research
並將計算的重要環節連接橋單獨取出,進行專門的簡化模型推導,根據連接橋上與片體相連處節點的受力情況分析應力分佈規律,尋找合理的載荷施加方法,並根據實際情況對模型進行約束,使連接橋單獨計算的結果與全船計算相吻合,從而達到模擬全船的簡便計算的目的。In this paper, 3 - d fem for the global ship, by adding loads and inertia adjustment, is used to calculate its longitudinal strength, longitudinal bending distortion and stress distribution, and the efficiency pf the superstructure to stand against longitudinal strength, which present a foundation for the check of ship ' s longitudinal strength
本文採用整船三維有限元分析方法,通過整船加載和慣性平衡處理,計算出設計目標船的總縱彎曲變形和應力分佈,以及上層建築參與船體總縱強度的有效度,為船體總強度校核提供依據。Abstract : the time - variant reliability analysis of ship hull girders subjected to the deg r adations of fatigue and corrosion is quantitatively carried out in this paper. th e analytical formulations are derived and simple program is compiled. as a case s tudy, the time - variant reliability of a vlcc tank is calculated. it shows that th e degradation effects of fatigue and corrosion are very important for the load - c a pacity calculation of thsip hull girders. after the second special inspection ( 10 years ), the detailed inspection should be done in order to guarantee the safety of ship navigation
文摘:定量考慮船體構件疲勞裂紋擴展和環境腐蝕對船體梁承載能力的雙重衰減因素的影響,對船體梁的時變可靠性進行了分析,列出了時變可靠性分析公式並編制了相應的計算程序.以一艘大型油船的結構可靠性為例,表明疲勞裂紋和環境腐蝕在第二個特檢年( 10a )之後對船體梁承載能力有顯著的影響,此時開展詳細的船體結構檢查對保證船舶營運的安全性具有重要的意義Theuse of permanent backing bars in highly stressed welds in hullstructures is to be avoided as far as possible
例2 :船體結構中,凡承受高應力的焊縫,應盡量避免採用固定墊板連接。In the second part, thinking of the fact that ship girders with special holes in web are commonly used, the author studied the stress concentration of this kind of structures by using fem and discussed the influence of hole to overall structural strength and its reinforcing methods
本文的第二部分針對船舶強梁腹板特殊開孔的工程實際,應用有限元法分析了開孔引起的應力集中現象和開孔后對強梁整體強度的影響,討論了工程開孔三種常用補強方法的補強效果。The aims of this thesis are buckling and ultimate strength. its main content is as follows : emphasizes the significance and purpose of the research in buckling and ultimate strength, and reviewing the status in this field, and puts forward the research task ; analyzes and discusses the design formulations for the buckling strength of the ship plating, in which the influence of residual stresses, lateral pressure, cut - outs and rotational restrains is taken into account
本文以船體板的屈曲和極限強度為研究目標,主要內容有: ?指出研究船體板屈曲和極限強度的意義和目的,簡要回顧了國內外的研究現狀。並提出本文的研究內容; ?考慮殘余應力、側向壓應力、開孔和扭轉約束對于板格的屈曲強度的影響,討論了各個因素影響下的板格的屈曲強度計算公式。The computations are shown to agree well with available experimental and numerical data and the physics of 3d large - scale flow separations and vortex shedding are confirmed. the simulation of the flow around a maneuvering wigley hull is a demonstration of capability for calculations of sway forces and yaw moments acting on a hull moving obliquely at a large range of yaw angles. the focus of study is large - scale cross - section separation flows, bilge - vortex development along the hull in the longitudinal direction and their effects on hydrodynamic forces
應用所開發的求解器,以wigley船型為算例計算了大角度斜航船體粘性流場和水動力,分析了漂角的變化對船體所受到的粘性水動力的影響,相當精確地預報了以橫流分離和般渦生成與泄出為特徵的操縱運動船體特有流動形態及橫向水動力和轉脂力矩,經與現有試驗和計算數據比較,檢驗和驗證了該求解器精確模擬繞斜航運動船體的大尺度分離流動和計算非線性水動力的能力。Using 2 - d strip method and the high - speed slender body theory, the heaving motion responses in regular wave of ship with combined appendage are computed. the results are compared with the results of naked ship hull, and the anti - pitching effect of combined appendage is validated. a method of optimizing the seakeeping is provided from the aspect of the ship hull
因此本文針對船舶耐波性能的優化,提出了一種減縱搖組合附體,將半潛艏和艏鰭安裝在常規單體船上,初步闡述了半潛艏和艏鰭的水動力作用機理,並按照二維切片法和高速細長體理論計算了加裝組合附體后,船舶在規則波中的垂向穩態運動響應,與裸船體的結果進行了比較,驗證組合附體的減搖效果,從船體本身出發提供了?種優化船舶耐波性的方法; 3Reasonable finite element model for ship structure strength can evaluate the more exact stress state
合理的建立船體結構強度分析的有限元模型,可以求出整船的應力狀態。分享友人