Introducing the theory and application of boundary element method on the sound radiation, giving the process of solving vibration noise radiation problem using boundary element analysis software ; presenting the coupling theory and the combination analysis of finite element method and boundary element method, and doing relevant analysis based on close drum shell ; programming the noise data simulation program using the numerical calculation software, simulating the acoustic and pressure data of a key point in the transient response acoustic field of the close drum shell, realizing the audibility of the noise, using the virtual reality tools to simulate the vibration noise of the drum shell ; combining the finite element method and boundary element method to analyze the vibration noise radiation of some gear box, and completing the whole simulation process of the vibration noise of the gear box
綜合介紹了邊界元法在聲輻射問題上的理論及應用;並給出了運用邊界元法分析軟體求解振動聲輻射問題的過程。闡述了有限元法和邊界元法的耦合理論及組合分析方法,並以封閉
鼓形薄殼為分析對象進行了相應的分析。利用數字計算軟體編制了噪聲數據模擬程序,並模擬了通過組合方法分析封閉
鼓形薄殼瞬態
響應聲場而獲得一關鍵點的聲壓數據,實現聲音的可聽化,隨后通過虛擬現實工具實現了該情形下橢球殼振動噪聲的虛擬模擬。
The sidewinders were convinced as a morale booster.
響尾蛇導彈不過是用來充當
鼓舞士氣的工具罷了。
The latter includes most of the smaller percussion instruments, like triangle, tambourine, castanets, cymbal, gong and sleigh bells. the tambourine is a small drum with a single calfskin head
而大部份的小型敲擊樂樂器都屬於後者,當中包括三角鈴鈴
鼓響板銅鈸鑼及馬鈴等。
The latter includes most of the smaller percussion instruments, like triangle, tambourine, castanets, cymbal, gong and sleigh bells
而大部份的小型敲擊樂樂器都屬於後者,當中包括三角鈴鈴
鼓響板銅鈸鑼及馬鈴等。
Not enough love, money, food, credit, glory ? the subject of our deprivation obsessions varies, but the theme " not enough " pounds away like a monotonous drumbeat
「 - -愛不夠、錢不夠、食物不夠、贊譽不夠、榮耀不夠- -雖然每個人感到」缺乏「的對象不同,但是,其中主旨是「不夠」就好像單調
鼓聲
響個不停。
Drumbeats sounded, sporadic at first, then quickly joined by more and more until the entire forest was alive with a rhythm that started soft like the rain, then grew to a persistent, thundering roll
戰
鼓擂
響,起初只是零星的
鼓點,緊接著越來越多的
鼓聲混雜在一起,直到整片森林從開始像雨點一樣輕的節奏撼動,逐漸變成連續不斷的雷鳴般的轟鳴。
From the belfries far and near the funereal deathbell tolled unceasingly while all around the gloomy precincts rolled the ominous warning of a hundred muffled drums punctuated by the hollow booming of pieces of ordnance
喪鐘從遠遠近近的鐘樓里不停地
響著,教堂幽暗的院子周圍,一百面聲音悶啞的大
鼓發出不祥的警告,不時地被大炮那甕聲甕氣的轟鳴所打斷。
Basing on this, the paper researches the mechanism of floor heave, and analyzes the effects of gravity stress, tectonic stress, the strength of surrounding rock, terrestrial heat and imbibition water on floor heave
在此基礎上,研究深部開采條件下巷道底
鼓發生的機理,並對自重應力、構造應力、圍巖強度、地溫、水對底
鼓的影
響進行了分析。
The thesis analyzes the effect of the increase of mining depth on the floor heave, discusses the laws that gravity stress, tectonic stress, the strength of surrounding rock, terrestrial heat and imbibition water change with the increase of mining depth
分析了采深對巷道底
鼓的影
響,以及自重應力、構造應力、圍巖強度、地溫、水隨開采深度變化的規律。
Thereafter conch shells, bugles, trumpets, kettledrums and cow horns suddenly were all simultaneously sounded and that combined sound became tumultuous
緊接著,所有的螺號,軍號,喇叭,銅
鼓和牛角都突然同時
響了起來,交織在一起,喧囂震天。
Thus all israel brought up the ark of the covenant of the lord with shouting, and with sound of the cornet, and with trumpets, and with cymbals, making a noise with psalteries and harps
代上15 : 28這樣、以色列眾人歡呼吹角、吹號、敲鈸、
鼓瑟、彈琴、大發
響聲、將耶和華的約櫃抬上來。
Objective : to study alteration of major effective component in semen sojae praeparatum ( ssp ) by pure breed fermentation
摘要目的:研究純種發酵對淡豆
鼓主要有效成分的影
響。
Monkey shrieks swirled over the pounding of drums.
猴子的尖叫幾乎淹沒了咚咚轟
響的
鼓聲。
They beat the tattoo - call, counted over their number, had supper, and settled themselves round the firessome repairing their foot - gear, some smoking pipes, others stripped naked trying to steam the lice out of their clothes
響起了晚點名的
鼓聲,吃過晚飯,在火堆旁準備過夜有一些在補鞋襪,有的在吸煙,還有一些脫光了衣服,烘烤衣衫裏面的虱子。
This paper discusses the influence of the smelting and casting technology ' s development of chinese bronze on timbal, then points out the timbal of south china is based on and embodies the advanced bronze technology in central plains
摘要通過中國青銅冶煉技術及鑄造技術的發展情況來闡述技術的發展對銅
鼓鑄造的影
響,說明了長盛不衰的銅
鼓是以先進的冶鑄技術為載體,並體現著先進的青銅冶鑄技術在南方的延續。
Helen della delmar proclaimed with a flourish of trumpets and rolling of tomtoms to be the greatest woman poet in the united states denied brissenden a seat beside her on pegasus and wrote voluminous letters to the public, proving that he was no poet
海倫德拉德爾瑪她是以花腔連天的喇叭和震天價
響的
鼓聲被捧上了合眾國最偉大的女詩人寶座的拒絕在她的飛馬背上給予布里森登一席之地。
Kung fu with drum performance led lion
獅威
鼓響顯非凡
Darkness closed around, and then came the ringing of church bells and the distant beating of the military drums in the palace court - yard, as the women sat knitting, knitting
黑暗在積聚,教堂的鐘聲響了,遠處的王家衛隊的軍鼓響了。婦女們坐在那兒不斷織著毛線。