elastic after effect 中文意思是什麼
elastic after effect
解釋
彈性後效-
In numerical simulation, the elastic zone is only considered and the effect of blasting waves on the rock medium, after attenuating through crushing zone and ruptured zone, becomes an input load
數值模擬僅考慮彈性區域，爆炸波對巖石介質的作用經粉碎區、破裂區衰減后成為輸入荷載。 -
The effect of car body elastic vibration on the ride comfort is analyzed. the ride comfort and acceleration responses of the car system with rigid car body model or elastic car body model are studied and compared. finally by using ansys / ls - dyna software, the finite element impact models of car body with a rigid wall have been set up, then the displacement, velocity, acceleration and energy variation of the car body are analyzed and compared for before and after lightening cases under the condition of impact speed 5. 8m / s and 11. 8m / s
本文利用ansys軟體建立了25k硬臥客車車體輕量化前後的有限元模型，計算了車體的強度、剛度和模態，並對輕量化前後的車體作了對比分析；然後，用nucars動力學分析軟體建立了25k硬臥客車系統的數學模型，分析了彈性振動對平穩性的影響，並對剛性車體和輕量化前後的彈性車體對平穩性和加速度響應的影響作了對比分析；最後用ansys / ls - dyna軟體建立了25k硬臥客車車體輕量化前後的動態顯式有限元模型，分別在5 . 8m / s和11 . 8m / s的速度下碰撞剛性墻，得到了車體的相對位移、速度、加速度和能量的變化過程，並作了對比分析。 -
Based on the concepts of elastic wave velocity of skeleton and reinforced cohesion, the effect on the velocity by soil density with different saturation was distinguished from that by weakened reinforced cohesion ; on the condition of same confined press and saturation, the elastic wave velocity was measured before and after soil samples were dynamically loaded, so that the elastic wave velocity changed by dynamic load was distinguished from that by soil. nature characteristic
（ 9 ）通過試驗運用了骨架波速和黃土加固凝聚力的概念，將飽和度的增加引起土體密度的增加對波速的影響與水破壞加固凝聚力對波速的影響區分開來；在相同的壓力和飽和度（近似）條件下，採用動力作用前後分別測試彈性波速的方法，將動力荷載對加固凝聚力的破壞作用與土樣自身的顆粒組分對波速的影響因素區分開來。 -
But this method still exists some shortcomings such as : while adopting displacement - control analysis method how to estimate the structural displacement requirement, how to select the horizontal load mode before and after the structure yields, how to considerate the high level mode that have a large effect while it is in the later position, how to considerate the elastic - plastic response spectra correctly. these problems remain to be solved. so this method needs to improved furtherly
但該方法仍存在一些不足，如：分析時採用位移控制的方法時，如何預估結構的最大位移需求；結構屈服前後水平荷載的分佈模式如何選取；對結構影響顯著但比較靠後的高階振型如何考慮；如何正確的考慮結構的彈塑性反應譜等問題仍沒有得到很好的解決，因此該方法仍需進一步的改進。 -
Based on the idea of the measured displacement can be divided into elastic and plastic parts, elastic parameters can back analyzed by the elastic displacement, which is the measured instant after blasting excavation. the strength parameter can be got by plastic deformation, which is the measured during the period of construction loop without blasting excavation. lastly, depending on fenner formula, a new and valid evaluating criterion for tunnel stability is presented and the effect of deformation modulus, cohesion, internal friction angle and overburden can be considered
以解析理論為基礎提出一種實用而簡便的圓形洞室彈性反分析方法，且將其應用推廣到其它洞型、分步位移等不同情況；提出一種圍巖強度參數反演方法，並對其可靠性進行了初步研究； （ 4 ）依據芬納公式提出了能夠考慮圍巖變形模量、強度參數、埋深等主要因素的、新的、有效的圍巖穩定性評判方法。
分享友人