modal synthesis meaning in English
模态综合
Examples
- 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:在混合界面模态综合法中，子结构的节点位移被视为相对于对接界面约束节点的弹性变形和伴随约束节点的牵连运动位移之和。 - 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
摘要利用基于动态子结构、有限元和模态分析的新产品脆值分析理论，以及计算机编程方法，从分析收音机数学模型入手，设计并进行收音机计算机辅助脆值试验。 - 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
带冠叶片不但能调频，还可以利用叶冠之间的摩擦效应来耗散能量，达到减振的目的.带冠叶片在离心力场中形成一整体，其整圈叶片振动特性不同于单个孤立叶片，需考虑叶冠的整体效应.利用带冠叶片系统的循环对称性，提出了采用波传播理论和模态综合技术，结合有限元方法研究燃气轮机带冠叶片振动特性的分析模型和计算方法.算例和工程应用证明了该方法是效性的、正确的，并可以大大降低计算分析规模.研究表明带冠叶片动力特性分析时必须考虑整圈叶片的耦合效应 - 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
本文的工作重点是将试验模态分析技术与msc / nastran中的解析模态计算和部件模态综合技术结合起来去解决工程实际问题，着重探索了msc / nastran中外部超单元分析的过程和重要语句，以及模态试验数据的输入等问题，并以一个t型结构和某型飞机全机模型为例做了部件模态综合计算。