mesh n. 1.網(wǎng)眼;篩孔;〔pl.〕網(wǎng),網(wǎng)狀物,網(wǎng)絡;網(wǎng)絲;銅紗;〔pl.〕法網(wǎng)。 2.【機械工程】(齒輪的)嚙合。 a 60 mesh screen (每英寸有)60孔的篩子。 a net with half-inch meshes 半英寸孔的網(wǎng)。 vt. 1.用網(wǎng)捕;使纏住。 2.【機械工程】(使)咬合,鉤住 (with)。 3.編[織]網(wǎng);使成網(wǎng)狀。 mesh a net 編網(wǎng)。 vi. 1.被網(wǎng)住,落網(wǎng)。 2.緊密配合;【機械工程】互相嚙合 (with)。 be caught in meshes of the law 陷入法網(wǎng)。 be in mesh (齒輪)互相咬住。
In this article , according to heat conduction theory and finite element theory , the temperature field in the arch dam during construction and operation are simulated and analyzed by means of three dimensional finite element relocating mesh method , and the distribution law of the temperature field in the arch dam during construction and operation are systematically studied , and according to the construction process of concrete arch dam , the effect of lamination placement , construction interval , thermal insulation change , surrounding temperature change and water storage on temperature field in the arch dam are also considered 論文根據(jù)熱傳導理論及有限元理論,用三維有限元浮動網(wǎng)格法對施工期和運行期溫度場進行了全過程仿真分析,較為系統(tǒng)的研究了混凝土拱壩施工期和運行期溫度場分布規(guī)律,在分析中按照混凝土拱壩施工過程,考慮了混凝土分層澆筑、施工間隙時間、絕熱溫升過程及壩體材料分區(qū)、水庫分期蓄水和環(huán)境溫度變化等因素對壩體溫度場的影響。
This paper mainly calculates the temperature field and thermal stress during construction and operation of rcc , what " s more , studies the distribution regulation of temperature field and temperature stress field of baise roller compacted concrete ( rcc ) overflow dam in guanxi province using three - dimension finite element floating mesh method 本論文用三維有限元浮動網(wǎng)格法對碾壓混凝土壩溢流壩段施工期和運行期溫度場和溫度應力進行了仿真計算,研究了廣西右江百色水利樞紐碾壓混凝土壩溢流壩段施工期及運行期溫度場和溫度應力場分布規(guī)律。
Against a prototype which is being produced , its three dimension end region entity model of stator is established , and with the aim of simplifying calculation , the theory of how to simplify entity model is studied , then the theory is made use of , and the end region entity model of stator is simplifi - ed ; meshing characteristics of three dimension entity model and shortcomin - gs of end region entity model of stator are studied , then meshing method of three dimension end region entity model of powerformer stator is studied as well , and the simplified entity model is meshed with this meshed model , the distribution of end region magnetic field of stator is analyzed , and the magnetic field energy and reactance of powerformer end region are calculated and compared with design value because the prototype is being produced , in this paper , stator core , gap and eddy equipment are not taken into consideration , and this has a little influence on the result , but through analysis , the result is proved to be good through the example calculation , it is known that the method of this paper is useful and through theoretic analysis , it is proved that end region 針對一臺生產(chǎn)中的樣機,對其建立了定子端部三維實體模型,而且為了達到簡化計算的目的,研究了如何將其簡化的理論,并應用這些理論對樣機定子端部實體模型進行了簡化;研究了三維實體模型的剖分特點和定子端部實體模型存在的缺點,在此基礎之上,研究了對簡化的powerformer定子端部三維實體模型的剖分方法,并且對簡化的實體模型進行了剖分。應用剖分的三維實體模型,用有限元法分析了powerformer定子端部的磁場分布,計算了端部區(qū)域的磁場儲能,并利用磁場儲能計算了powerformer定子端部漏抗,將計算值與設計值進行了比較、分析。由于樣機處在設計生產(chǎn)階段,本文暫時沒有考慮定子鐵心、氣隙和渦流器件對端部磁場的影響,這對分析結果有一定的影響,但是仍然得到較好結果。
In this article , according to heat conduction theory , elastic creep theory and finite element theory , the temperature field and creep stress field in the arch dam during construction and operation are simulated and analyzed by means of three dimensional finite element relocating mesh method , and the distribution law of the temperature field and creep stress field in the arch dam during construction and operation are systematically studied , and according to the construction process of concrete arch dam , the effect of lamination placement , construction interval , elastic modulus change , thermal insulation change , surrounding temperature change , concrete creep and autogenous volume change on thermal stress in the arch dam are also considered 論文根據(jù)熱傳導理論、彈性徐變理論及有限元理論,用三維有限元浮動網(wǎng)格法對拱壩施工期和運行期溫度場、徐變應力場進行了全過程仿真分析,較為系統(tǒng)的研究了混凝土拱壩施工期和運行期溫度場、徐變應力場的分布規(guī)律,在分析中按照混凝土拱壩施工過程,考慮了混凝土分層澆筑、施工間隙時間、彈模變化、絕熱溫升過程、環(huán)境溫度的變化、混凝土徐變、自生體積變形等因素對壩體溫度應力的影響。
In order to reduce the calculation scale of the simulation , three dimension finite element relocating mesh model , which is controlled by the age of concrete , is presented . it " s rationality is argued theoretically . through the comparison by the fixed mesh method , it can be concluded that this model is effective , the precision can be assured and the amount of the calculation is reduced 為了降低仿真計算的規(guī)模,本文提出了以混凝土齡期為判斷條件來控制網(wǎng)格浮動的三維有限元網(wǎng)格浮動計算模型,并從理論上分析論證了該模型的合理性,通過與固定網(wǎng)格法計算結果對比得出:該模型是可行的,并且在保證計算精度的前提下大大減小了工作量。
Three - dimension finite element floating mesh method is used to calculate the temperature field and thermal stress of 6aa roller compacted concrete gravity dam section and f6 fault concrete tuck in this paper . the basic theories adopted include heat conduction theory , elastic theory and corresponding finite element calculation equation 本文用三維有限元浮動網(wǎng)格法對6aa壩段及基礎部位f6斷層混凝土塞的施工過程進行溫度場和溫度應力仿真計算,計算的基本理論是熱傳導理論和彈性理論以及相應的有限元計算公式。