modal synthesis 中文意思是什麼
modal synthesis
解釋
模態綜合-
Presents the model proposed for analyzing the vibration characteristics of shrouded blades and their calculation method by employing a wave propagation theory and modal synthesis technology coupled with a finite element method from the view point it is possible not only to conduct frequency modulation of the shrouded blades of a gas turbine, but also to utilize the friction effects between them to dissipate energy, thereby attaining the aim of vibration alleviation, as shrouded blades have been widely used in the design of high - speed turbomachinery, such as modern gas turbines and steam turbines, and with the shrouded blades forming an integral whole in a centrifugal force field, the vibration characteristics of the whole ring of blades are different from those of a single isolated blade, and this makes it essential to take into account the integral effect of blade shrouds, concludes from the calculation examples and engineering application that the above approach is valid and correct along with the possibility of considerably reducing the scale of calculation and analysis, and points out it is necessary to take into consideration the coupled effect of the whole ring of blades while the dynamic characteristics of shrouded blades is being analysed
帶冠葉片不但能調頻，還可以利用葉冠之間的摩擦效應來耗散能量，達到減振的目的.帶冠葉片在離心力場中形成一整體，其整圈葉片振動特性不同於單個孤立葉片，需考慮葉冠的整體效應.利用帶冠葉片系統的循環對稱性，提出了採用波傳播理論和模態綜合技術，結合有限元方法研究燃氣輪機帶冠葉片振動特性的分析模型和計算方法.算例和工程應用證明了該方法是效性的、正確的，並可以大大降低計算分析規模.研究表明帶冠葉片動力特性分析時必須考慮整圈葉片的耦合效應 -
Abstract : in mixed - interface modal synthesis method, the substructural displacement is considered as the synthesis of the elastic displacement to interface free - points and the implicated displacement produced by the fixed - points
文摘:在混合界面模態綜合法中，子結構的節點位移被視為相對于對接界面約束節點的彈性變形和伴隨約束節點的牽連運動位移之和。 -
Based on synthesis analyzed cranes drums " strength, stability calculate theory and abundant test, the dissertation also predigest the consider method of rope slot protruding stiffened and present corresponding calculate chart, the dissertation also discussed the drumd " strength and the judgment method of destroy modal of drums " stability and brought forward new drums " design and calculate method. at last, the paper
在綜合分析起重機捲筒強度、穩定性計算理論並進行大量試驗研究的基礎上，對捲筒設計計算中繩槽凸筋的考慮方法進行了簡化，給出了相應計算圖表;對捲筒強度、穩定性破壞形式的判斷方法也進行了討論，提出了切合工程實際要求的實用化的捲筒設計計算方法。 -
Modal impedance synthesis method applied to analyzing vibration of iocomotive
用模態機械阻抗綜合法分析機車振動 -
By means of new product fragility analyzing theory based on dynamic substructure, finite element, modal synthesis and vibration modal congruence theories, and computer programming method, and beginning from radio mathematic model, the computer aided radio fragility test was design and carried out
摘要利用基於動態子結構、有限元和模態分析的新產品脆值分析理論，以及計算機編程方法，從分析收音機數學模型入手，設計並進行收音機計算機輔助脆值試驗。 -
This paper combines the experimental modal analysis technique with the techniques of analytic modal and component modal synthesis ( i. e. external superelement analysis ) provided by msc / nastran to obtain the modal parameters of complex structures. it mainly researches the process of external superelement analysis, required important sentences in msc / nastran and the method inputting modal test results. a t - kind structure and an aircraft mode, as examples, are researched through experimental modal analysis and component modal synthesis
本文的工作重點是將試驗模態分析技術與msc / nastran中的解析模態計算和部件模態綜合技術結合起來去解決工程實際問題，著重探索了msc / nastran中外部超單元分析的過程和重要語句，以及模態試驗數據的輸入等問題，並以一個t型結構和某型飛機全機模型為例做了部件模態綜合計算。
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