From theory and experiment point of view, the structure morphology, static and dynamic behavior, constructing process and model experiments are studied systematically in this dissertation 本文從理論和試驗兩個方面,對葵花型索穹頂結(jié)構(gòu)的形態(tài)、靜力和動力性能、施工成形方法和模型試驗等內(nèi)容進行了系統(tǒng)的研究。
The history and several projects of cable dome are briefly introduced . advances of cable dome are reviewed and the directions of cable dome research are also discussed . the concrete contents of structure morphology are presented 簡單介紹了索穹頂結(jié)構(gòu)的發(fā)展歷史和幾項國外索穹頂結(jié)構(gòu)建筑;回顧了索穹頂結(jié)構(gòu)的研究現(xiàn)狀,指出了今后的研究方向。
Moreover, the heredity of al and al alloys own structure morphologies has been discussed . block or flack-like tial and bar-like or particles tib2 can be obtained by means of fluoride salt method melting at 800 c ~ 1100c under the other same condition 用氟鹽法制備中間合金時,在其它條件相同的情況下,改變?nèi)蹮挏囟?8001100)可以得到含有塊狀和針片狀形態(tài)的tial_3晶體和條狀與顆粒狀tib_2化合物的中間合金。
Melting temperature, putting in sequenceiof raw material, chemical composition and flux type affecting structure morphologies of altib master alloys in producing process of master alloys has been systematically investigated from the view of al-ti-b master alloys heredity . and we study the effect that different master alloys refine commercial al and al alloys 本論文主要從altib中間合金遺傳性的角度出發(fā),系統(tǒng)地研究了在制備中間合金的過程中,熔煉溫度、原料加入順序、ti含量、凝固速度、原料的化學(xué)成分和熔劑種類等對中間合金組織形態(tài)遺傳性的影響。
It was pointed out that with different chemical composition and different iso-quenching temperature, the structure morphologies of the bainite transition products are different from each other, the ferrite is the indispensable constituent, and whether there is or not carbide existing is not the necessary criterion to discern the bainite 指出不同化學(xué)成分和不同等溫溫度時貝氏體相變產(chǎn)物的組織形態(tài)不同,鐵素體是貝氏體中不可缺少的組成部分,以及碳化物的存在與否不是判斷貝氏體的必要依據(jù)。
The structure and the thickness of the coatings was inspected by the xjp-2 metallography microscope, the structure morphology was tested by philips xl30 peg sem, and the adhesion between the foundation and the coating was examed by two methods : one is ws-92 sound-producing coating adhesion nick testing, another is bending 利用xjp-2型金相顯微鏡觀察鍍層組織并測其厚度,philipsxl30feg型掃描電鏡觀測鍍層表面的組織形貌,鍍層與基體的結(jié)合力采用ws-92型聲發(fā)涂層附著力劃痕試驗和彎折法兩種方法來定性地檢測。