正弦形振動 的英文怎麼說
中文拼音 [zhēngxiánxíngzhèndòng]
正弦形振動
英文
sinusfrmige schwingung sinusoidal vibration-
This paper presents the displacement solution to mine elevator viscoelastic vibrating equations and the kinetic tension calculation method, discusses kinetic tension characteristics under rectangular, ladder shaped, sinusoidal and parabolic acceleration curves, provides ways to limit or even avoid lifting rope viscoelastic vibration
摘要給出了礦井提升機粘彈性振動方程的位移解及動張力的計算方法，研究了採用矩形、梯形、正弦形、拋物線形加速度時銅線繩的動張力特性，給出了限制和消除提升鋼絲繩粘彈性振動的方法。Considering the similitude law for shaking table test, we study the test results and obtain some conclusions which are a ) generally, the silty soil in test box liquefies and the liquefied time has relation with the amplitude of acceleration, b ) when the intensity is on and above eight degree, the silty soil deposit will be liquefied dramatically, c ) the relationship of the pore water pressure is relevant to the cycle loading which represents when the cycle loading ranges from little to great, the relationship is represent as a concave curve, or else as a protruding curve and tends to stability. ( 3 ) based on the triaxial compression test and the resonant column test, some studies are made such as a ) the duncan - chang parameters of constitutive model, b ) the dynamic shear modulus ratio and c ) the damping ratio of the site soil deposits. in order to deal with the test data, a computer program is compiled
（ 2 ）利用小型振動臺進行了k _ 0固結狀態下粉土的振動液化模擬研究，通過分析正弦荷載作用下的試驗資料，驗證了粉土的孔隙水壓力增長模式的合理性；從微分方程推導了基於土體振動臺模型試驗的相似律，並從模型實體、孔壓時程曲線和相似律等方面做出了分析，得出了如下結論：在小型振動臺試驗中，模型箱中的粉土都發生了液化，液化的時刻和輸入加速度幅值有關，而對頻率的變化不太敏感；粉土在相當於8 9度地震烈度的加速度幅值作用下可能產生嚴重的液化；孔壓的增長曲線形狀與施加的荷載有關：當施加荷載為由小到大的形式時，曲線形狀為上凹的曲線；當施加荷載為等幅的正弦荷載或荷載幅值由大到小時，曲線形狀為上凸的曲線，且逐漸趨于穩定。Conditions of normal mode realization are deduced and optimized model with the multivariate mode indicator function as the target function is built. through solving the maximal eigenvalue problem, the original shaker force vector of appropriation is reached. then the realization approach of the optimal shaker force vector based on single shape principle is proposed and at the same time the automatization of normal mode appropriation is realized
對于模態物理分離技術的多點正弦激振純模態試驗技術，尋求其最佳激振力矢量是最為關鍵的環節，本文先推導出純模態實現的條件，建立以多變量模態指示函數為目標函數的優化模型，通過求解最大特徵值問題，得出適調純模態的初始激振力矢量，再提出以單純形原理為基礎的最佳激振力矢量的實現方法，同時也實現了純模態適調過程的自動化。After comparing three form ( rectangle, saw and sine wave ) of excitation force, the conclusion is drawed that the sine wave is much better than the other two waveforms. finally, multi - seedling virtual prototype is studied
另外，對比分析三種波形（矩形波、正弦波及鋸齒波）激振力對振動系統的影響，發現採用正弦波激振力對振動系統沖擊較小，應優先考慮使用。分享友人