modal mass 中文意思是什麼
modal mass
解釋
模態質量-
It shows that the modal shape and mode frequency are highly coupled with the viv response of a marine riser with low mass ratio
該模型的計算結果表明，立管的模態振型、模態頻率與渦激振動響應高度耦合，並且對于低質量比的情況尤為明顯。 -
The most danger place is discovered. the advices to improve the components structure are given on the basis of deform and stress distribution. ( 6 ) the modal analysis of the main frame is carried out. the method of centralized mass is made use of
（ 5 ）利用ansys軟體對主機架進行建模，根據實際情況對各種工況施加荷載和約束條件，利用該軟體的后處理程序，分析主機架上各點在各工況下的應力與變形，找出最危險點，從而對主機架結構進行改進。 -
Through newton ’ s law of motion, the continuous model of the cantilever is built. the author discretizes the model through lumped mass method and supposed modal method, analyzes the discretized model through influence coefficients method. compare the results of the two models ; the general analysis method of non - uniform beams is obtained
其次，對懸臂梁結構進行了理論分析，應用牛頓運動定律，建立了懸臂梁系統的連續模型，並用集中質量法和假設模態法對懸臂梁系統進行了離散化，運用影響系數法對離散化后的系統進行了分析，並把分析結果和連續系統進行了對比，得到了變截面梁的一般分析方法。 -
Hong kong has a diverse multi - modal public transport system, comprising an electrified kowloon - canton railway, a mass transit railway, an airport railway, a light rail transit, a tramway, franchised buses, public light buses, taxis, residents services, a funicular cable tramway and ferry services, extending to almost every part of the territory
香港擁有多元化的公共交通系統，包括電氣化的九廣鐵路、地下鐵路、機場鐵路、輕便鐵路、電車、專營巴士、公共小型巴士、的士、居民巴士服務、纜車及渡輪等，服務范圍幾乎遍及全港。 -
When the structural seismic responses of suspension - mass pendulums were analyzed with response spectrum method, the vibration modal numbers considered were to be structural first vibration modal and previous vibration modals of structural vibration as well
用反應譜法對懸吊結構進行地震反應分析時，所考慮的振型數應為結構的第一振型和相應于結構振動的前幾個振型。 -
The frequence and modal of main stream piping were analysed under the condition of different velocity of stream and the valve taken as the centralizing mass. this paper also gives the responses of steady state under the condition that the frequency of forced vibration is 4hz 、 8hz 、 12hz respectively
將閥門作為集中質量處理，分析計算不同蒸汽流速下，某汽輪機主蒸汽管道系統的振動頻率和振型，並給出了激振力頻率分別為4hz 、 8hz 、 12hz時該管道系統的穩態響應。 -
Then, the hilbert transform is applied to each modal response to obtain the instantaneous amplitude and phase angle time histories. a linear least - square fit procedure is proposed to identify the natural frequency, damping ratios, physical mass, damping and stiffness matrices from instantaneous amplitude and phase angle for each modal response
然後對各階模態響應進行hilbert變換，得到瞬態幅值和相位角的時間歷程，再運用線性最小均方擬合來識別自然頻率、阻尼比、質量、剛度和阻尼矩陣。 -
Hong kong has a diverse multi - modal public transport system, comprising a kowloon - canton railway, a mass transit railway, an airport railway, a light rail transit, a tramway, franchised buses, public light buses, taxis, residents services, a funicular cable tramway and ferry services, extending to almost every part of the territory
香港擁有多元化的公共交通系統，包括九廣鐵路地下鐵路機場鐵路輕便鐵路電車專營巴士公共小型巴士的士居民巴士服務纜車及渡輪等，服務范圍幾乎遍及全港。此外，並設有復康巴士服務，供行動不便的人士使用。 -
There are three main approaches to predict the noise level : similitude structure method including the frequency - response method and proportion method, modal method including finite element method ( fem ) and boundary element method ( bem ), and statistical energy analysis ( sea ). the advantage of similitude structure method is to give the predicting data fast, but it has some error because of dealing with rough similitude parameter and mass load
目前對噪聲預示主要有三個方法：一是相似結構外推法，包括頻率響應法和比例法等；二是傳統的模態方法，包括有限單元方法（ finiteelementmethod ， fem ） 、邊界單元方法（ boundaryelementmethod ， bem ）等；三是統計能量分析方法（ statisticalenergyanalysis ， sea ） 。 -
Mr yeung also noted that in the years ahead kcrc would be transformed from a relatively small suburban mass - transit carrier into a territory - wide multi - modal railway operator serving a much larger population catchment
楊啟彥指出，九廣鐵路公司將會由一間較為小規模的市郊運輸機構，演變成一間為全港提供多模式服務的鐵路營運公司，服務更多的市民。 -
Based upon the orthogonal condition and the characteristic equation of the modal analysis theory, updating equations about the mass and stiffness matrices of the structure were constructed at first
對于阻尼結構動力模型修正，可由復模態的正交條件和特徵方程建立修正方程，應用所給的數值演算法求修正量。 -
Aiming at the underwater vehicle in fluid because of problem that fluid and solid coupling produced added mass, in using advanced hydrodynamics to proceed to the added mass the foundation that described, and using modal parameter design theories, the paper put forward according to modal parameter test data identified the method that added mass of the underwater vehicle
摘要針對水下航行器在流體中由於流固耦合所產生的附加質量問題，在用高等流體力學對附加質量進行描述的基礎上，利用模態參數識別理論，提出了根據實測模態參數來識別水下航行器附加質量的方法。
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