As the wheel load assumed in three dimensional model is more consistent to practical loading , the results are more accurate 由于三維模型所采用的車輪荷載更加符合實(shí)際作用的荷載,所以三維模型的結(jié)果更加準(zhǔn)確。
Therefore it has a practical significance to study the flexural performance of rc members strengthened with frp which simulate the practical loading state 因此進(jìn)一步模擬實(shí)際結(jié)構(gòu)的受力狀況進(jìn)行加固研究有重要的實(shí)際意義。
The thesis is based on automatic loading system . at first it introduces the traditional performance in this field , then it has designed a new scheme with studing practical loading operation 本文以實(shí)際的集裝箱自動(dòng)裝載系統(tǒng)為研究背景,設(shè)計(jì)出一種三層逐次優(yōu)化的裝箱方案。
During the previous analysis of asphalt pavement structure with cracks , the stress intensity factors were usually calculated approximatively using plane strain model for some limitation . however , the assumptive load of this model is not coincident to the practical load 在以往分析含裂縫的瀝青路面結(jié)構(gòu)時(shí),由于條件的限制,通常是假設(shè)瀝青路面結(jié)構(gòu)近似為一平面應(yīng)變模型,但是這種模型所假設(shè)的荷載與實(shí)際作用的荷載有較大的區(qū)別。
The relations , such as the tensile strength of extrusion products to extrusion ratio and contents of powder strengthen materials , the practical load of powder extrusion to contents of powder strengthen materials , extrusion ratio and extrusion velocity , were given by this dissertation 論文給出了實(shí)驗(yàn)過程中擠壓制品的抗拉強(qiáng)度與擠壓比、顆粒增強(qiáng)材料含量之間的關(guān)系,粉末擠壓所需的實(shí)際擠壓力與顆粒增強(qiáng)材料含量、擠壓比、擠壓速度之間的關(guān)系等。
The scheme is a three - step optimizing algorithm , its purposes are loading capacity optimization and efficiency of . operationg . with the practical loading restriction , it integrates heuristic algorithms and genetic algorithms , adopts layer loading idea and space partition and combining rule . the optimizing algorithm is composed of combination pretreatment , bottom space optimize and up space optimize . it can satisfy the loading restriction and has practicability 該方案以空間利用率的優(yōu)化以及運(yùn)算效率的提高為目標(biāo),根據(jù)裝載過程中的實(shí)際約束條件,采用分層裝載思想以及空間劃分合并原則,結(jié)合啟發(fā)式算法和遺傳算法,提出三層逐次優(yōu)化策略:組合預(yù)處理優(yōu)化、底層空間優(yōu)化、上層空間優(yōu)化。
However , the strength and deformation are most important property among all the mechanical capabilities of the concrete . with the rapid development of the winter construction , the mechanical performance under low temperature comes to draw people ' s attentions for it has close relationship with the practical load and safety status of the structure under the low temperature . 隨著近年來冬季施工在全國(guó)的迅速開展,混凝土在低溫下的力學(xué)性能開始受到人們的重視,特別是南水北調(diào)西線工程中高寒強(qiáng)震地區(qū)的水工結(jié)構(gòu)問題的研究,都與低溫下混凝土的力學(xué)性能直接有關(guān),它直接關(guān)系到在低溫下結(jié)構(gòu)的實(shí)際承載力以及安全狀況。
Besides , practical load of the ghes varies with time . the variable load of ghes is decomposed as a series of pulse load , and the superimposition principle is employed to obtain the real temperature response of the ghes on basis of the theoretical solutions of a single borehole experiencing a constant heat flux 利用把具有摘要, . . . . . . . . . . . . . . .復(fù)雜邊界條件和熱源的問題分解為許多較簡(jiǎn)單的問題的方法,把具有多個(gè)鉆孔的地?zé)釗Q熱器溫度場(chǎng)化作許多單孔溫度場(chǎng)的益加,建立了多鉆孔地?zé)釗Q熱器溫度場(chǎng)亞加模型。