Natural stone test methods - determination of the dynamic elastic modulus of elasticity by measuring the fundamental resonance frequency 天然石材試驗(yàn)方法.彈性的動(dòng)態(tài)彈性模量測(cè)定
Begin for the problem that some parameters can not be simulated exactly before , according to the data observed on - site , the dynamic elastic modulus and the elastic modulus of the spar of the rooftop has been reckoned in reverse with the function of ansys optimum . design 首先,針對(duì)以往計(jì)算中,部分模型參數(shù)模擬不準(zhǔn)確的問題,根據(jù)現(xiàn)場實(shí)測(cè)數(shù)據(jù),運(yùn)用ansys優(yōu)化功能對(duì)混凝土動(dòng)彈模和屋頂桁架桿的軸向剛度進(jìn)行了反演,用反演的參數(shù)結(jié)果建立模型進(jìn)行模態(tài)分析與實(shí)測(cè)數(shù)據(jù)符合較好。
The results show that the dynamic elastic modulus , loss modulus and complex viscosity of the nanocomposite are higher than those of pp , while the loss factor is lower , that the complex viscosity of the nanocomposites is more sensitive to temperature , and that the flow activation energy and the crystallization temperature increase respectively by 15 % and 10k as compared with pp , which may contribute to the enhanced interfacial interaction between pp and ommt resulting from the addition of tmpp 結(jié)果表明:與純聚丙烯相比,納米復(fù)合材料具有較高的動(dòng)態(tài)彈性模量、損耗模量和復(fù)合粘度,力學(xué)損耗因子則降低,納米復(fù)合材料的復(fù)合粘度對(duì)溫度的敏感性略高于聚丙烯;界面改性劑的加入增強(qiáng)了有機(jī)蒙脫土與聚丙烯的界面作用,與聚丙烯相比,納米復(fù)合材料的流動(dòng)活化能提高約15 % ,結(jié)晶峰溫度提高10k左右。