An accurate modal superposition method for calculating frequency response function of viscoelastically damped structures 粘彈阻尼結(jié)構(gòu)頻響函數(shù)計(jì)算的高精度模態(tài)展開(kāi)法
Firstly , with the curvature modal superposition method , the dynamic stress responses is calculated 首先,應(yīng)用有限元方法,基于曲率模態(tài)疊加原理計(jì)算曲率,進(jìn)而計(jì)算應(yīng)變、應(yīng)力。
Multi - flexible body dynamics is introduced into crankshaft computing , and diesel engine crankshaft dynamics simulation model is established combined with finite element method and modal superposition method 摘要將多柔體動(dòng)力學(xué)方法引入到曲軸計(jì)算中,并結(jié)合有限元法和模態(tài)疊加法建立柴油機(jī)曲軸動(dòng)力學(xué)仿真模型。
It spends much time to make an analysis of dynamic response and sensitivities with modal superposition method , and it reduces the efficiency of dynamic optimization design via this method 在動(dòng)力優(yōu)化過(guò)程中,采用常規(guī)的振型疊加法作一次動(dòng)力響應(yīng)及其敏度分析會(huì)耗費(fèi)大量計(jì)算時(shí)間,這樣大大降低了動(dòng)力優(yōu)化設(shè)計(jì)的求解效率。
The seism response analysis of aqueduct bridge is analyzed with modal superposition method based on response spectrum which participant mode of vibration chooses the former 1 0 steps and combinatorial method was srss 渡槽的地震反應(yīng)分析采用振型分解反應(yīng)譜法,參與振型取前10階,組合方法用srss法,求得結(jié)構(gòu)的地震作用效應(yīng)。
In the chapter 2 , based on elastic mechanics and variation principle , the fundamental and process of static and dynamic fem is presented , placing special emphasis on the modal superposition method 第二章根據(jù)彈性力學(xué)和變分原理,系統(tǒng)總結(jié)了有限元法求解靜力學(xué)、動(dòng)力學(xué)問(wèn)題(包括特征值、動(dòng)力響應(yīng)問(wèn)題等)的基本原理和步驟,并重點(diǎn)對(duì)模態(tài)疊加法求解動(dòng)力,響應(yīng)問(wèn)題作了闡述。
Abstract : according to the deep analysis of the typical punching process , the loading charts and the amplitude - frequency curves of straight side cnc turret press frame are obtained . in the end the dynamic response of a typical process is calculated using modal superposition method by fem software marc and the static and dynamic stress of some nodes is compared as well 文摘:根據(jù)板料沖裁時(shí)的工作負(fù)荷圖確定了數(shù)控回轉(zhuǎn)頭壓力機(jī)的動(dòng)載荷譜,并通過(guò)傅立葉展開(kāi),獲得了壓力機(jī)的幅頻譜,最后通過(guò)marc軟件采用模態(tài)疊加法計(jì)算了典型沖裁時(shí)機(jī)身的動(dòng)態(tài)響應(yīng),分析了其動(dòng)態(tài)特性,并對(duì)特征點(diǎn)的動(dòng)靜態(tài)應(yīng)力進(jìn)行了比較。