In the study of the lumber carrier, one of the very important problem is the in spot and ultimate station due to flooding which will bring tremendous threat to the ship because of the few holds in order to study the lumber carrier buoyancy, stability and longitudinal strength under the condition of flooding, the paper adopt fundamental ship principle and iterative and accumulative concept on the basis of insumersibility theory to detailedly calculate the flooding speed flooding amount front draft after draft stability and longitudinal strength considering the ship " s sinking and inclination which will change the center of gravity and the loading station both in hold and on deck and the effect of flooding and lumber amount in holdo in the last, the paper introduces an example of the actual ship named " fei yun ling " and makes a contrast between not taking measure and taking measure which draws a reasonable conclusion and comes up to some advice the method avoids the cockamamie calculating while insures enough precision the paper draws a conclusion that not all the lumber carrier will submerge when suffering the damaged flooding if the loading or measure is suitable
為了研究運木船舶在破艙狀態下的浮性、穩性和強度,
本文在抗沉性理論的基礎上,運用船舶基
本原理,採用了迭代和累計的思想,將船舶的進水過程劃分為很多次進水的積累,詳細計算了運木船在破艙進水的過程中,考慮到各種破艙參數、船舶
本身的下沉、艙室內木材、甲板貨的裝載情況和在進水過程中船舶
本身的傾斜對進水重心的影響,以及艙室內的進水量和木材對破口處進水速度的影響,船舶總的進水速度、進水量、首
尾吃水、穩性的實時狀態和最終船舶的總縱強度,給出了計算實例,並進行了在採取用泵抽水前後浮態參數的對比,得出了該船舶在艙室內的貨物積載量達到某個數值時可以保證船舶在破艙進水時不會沉沒,或者在當開口小於某數值時,採取適當的措施后,可以使船舶避免沉沒。
In this paper, the comparison of spermatogenesis and spermatozoal ultrastructures of four species of decapoda were investigated by electron microscopy ( tem ). we had tried to find structural variaton between the four species during their spermatogenesis. from this comparison study, we can pursue the evolution route of the four decapods
本論文採用透射電鏡技術比較研究十足目( decapoda )物種浙江華溪蟹( sinopotamonchekiangense ) 、三疣梭子蟹( portunus , trituberculatus ) 、脊
尾白蝦( exopalarmoncarinicandaholthuis )及羅氏沼蝦( macrobrachiumrosenbergii )的精子發生和精子結構。
A total of 770 hair samples from 78 dogs and 32 cats were cultivated to isolate fungus on sabouraud medium and dermatophyte test medium from january 2002 to march 2003 in veterinary teaching hospital of china agricultural university. all hair samples were collected from seven points of the pets : the right carpus, the lateral corner of right eye, the external canal of right ear, the dorsal of right ear base, dorsal, ventral and caudal
從2002年1月至2003年3月,在中國農業大學動物醫院對北京地區臨床健康寵物犬78隻、貓32隻,分別從其身體的右腕、外眼角、耳內、耳外、背、腹、
尾等7個點採集了770個被毛樣
本,進行真菌培養和鑒定。
First, the theory of fretting wear and studies on fretting fatigue were introduced and the parametric method was used in the process of creating the model of dovetail joints in ug software. the elastic contact problem is analyzed in finite element method ( fem ) and is used to the parameters " distribution and contact stress of the joint are obtained on the base of ansys code. with the effect factor of load frequency, the prediction method of fretting fatigue life of dovetail joint under low and high / low cycle complex load is proposed
本文介紹了微動損傷的機理和微動疲勞壽命的研究方法;利用ug軟體對燕
尾榫聯接結構創建了參數化實體模型;基於ansys軟體平臺求解彈性接觸問題,獲得了榫聯接結構接觸應力及接觸狀態量的分佈;在已有微動疲勞壽命預測模型的基礎上,引入載荷頻率影響因子,對低周、高低周復合載荷作用下的燕
尾榫聯接結構進行了微動疲勞壽命的預測,與試驗結果對比表明採用
本文提出的方法預測榫聯接結構的微動疲勞壽命是有效的。
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請參閱
本專欄結
尾處的
The explicit method of calculating surges in throttled, simple and downriver throttled and simple surge tanks has been derived for the first time by use of thaler series expansion from the basic formulation of surge tank. 2
根據調壓室的基
本微分方程,利用泰勒級數展開方法首次推導出了阻抗式、簡單式、
尾水阻抗式和簡單式調壓室水位波動的顯式計算公式。
He died at the end of this wistful and elegiac novel.
在這
本情意綿綿的哀歌式小說的末
尾,他結束了一生。
Shanwei was originally a port city
汕
尾本來就是一個港口城市嘛。
Based on main factors that affect funds performance we have found, finally, this paper gives several suggestions pertinently
在所找出的影響基金業績的主要因素的基礎上,在結尾本文有針對性地提出了若干政策建議。