The calculation - improving of stress amplification coefficient and the checking of its trouble - shooting model 羊腸線應力放大系數改進算法及故障模型鑒別
Calculating results show the dynamic amplification coefficient is smaller when the stiffness of the bridge is larger and vices versa 計算結果顯示,橋梁的剛度越大,由于抖振導致的動力放大系數越小;而橋梁的剛度越小,其動力放大系數越大。
It is found that the current amplification coefficient strongly depends on the spin polarization of the electrons injected from the emitter to the base , the spin relaxation time and the width of the base 自旋晶體管中的電流放大系數主要取決于注入基區的自旋極化電子的極化程度,基區中自旋的馳豫時間及基區的寬度。
Fatigue test indicates that strain multiplier have not been damaged for fatigue in the service life of fatigue life gage , fatigue response of fatigue life gage can be derived from the strain amplitude equal to specimen strain multiplied by amplification coefficient of strain multiplier 疲勞實驗研究表明,在疲勞壽命計工作壽命內,應變倍增器無疲勞破壞情況,疲勞壽命計疲勞響應可由靜載標定放大倍數乘試件表面應變后所對應的等幅應變值得到。
According to the theory analysis and engineering practice , the application of natural vibration features in bridge inspection is introduced . during the transient dynamic analysis of pubugou cfst arch bridge , the time history responses of the structure under uniform velocity moving load and impact load are analyzed , and the amplification coefficients of deflection and internal forces of the structure are intensively analyzed 在瀑布溝大橋的瞬態動力分析中,模擬分析了當移動荷載以不同速度通過橋面時的時間歷程動力響應以及在沖擊荷載作用下橋跨結構的時間歷程動力響應,并對橋跨結構在移動荷載和沖擊荷載作用下的動力放大系數作了較為詳細的分析。
Based on these foundations , we give a perfect scheme of the bbo opos : single pass amplification coefficient of the opg under different pump intensity is calculated ; collinear type - i and type - ii phase matching tuning curve pumped by the q switch nd : yag various harmonics as well as noncollinear type - i tuning curve are calculated in details ; the effect of the walkoff for the nonlinear effect coefficient and the group velocity matching are analyzed ; the acceptance angle in parametric process is calculated ; the numerical threshold of the bbo opo is calculated ; the process of the saturation and depletion of the pump beam are analyzed ; the relationship of the conversion efficiency and reflectance of output mirror are discussed ; various linewidth controlling methods are discussed ; the improvement of the beam quality applying the unstable cavity is discussed ; and the crystal bbo design is considered 在此基礎上,給出了一整套bbo - opo激光參數設計方案:計算了不同泵浦強度下的參量放大倍數;詳細計算了在nd : yag調q激光器各次諧波泵浦條件下的共線類和類相位匹配的調諧曲線,以及非共線類相位匹配調諧曲線;分析了走離角對非線性系數和群速匹配的影響;計算了參量過程的允許角;計算了bbo - opo的理論閾值條件;分析了飽和與泵浦光束的消耗過程;給出了轉換效率與超過泵浦閾值的倍數的關系;討論了轉換效率與輸出鏡反射率的關系;討論了線寬控制的各種方法;研究了利用非穩腔改善光束質量的方法;考慮了bbo晶體的設計。
To guarantee the stability of the frame in strong earthquake motion , and on the basis of analysis on the concept of “ capacity design ” in the above three countries seismic design provisions , it is advised that the moment amplification coefficients at the bottom sections of columns for the frame structures in some seismic intensity be increased to reduce the possibility of the frame column yielding . taking the above three countries seismic codes as reference , it is recommended that it be added details of seismic design by using diagonal shear reinforcement to safeguard beams against sliding shear failure , when the positive - negative shear forces are reverse and the ratio is high 為了保證在大震作用下框架結構的穩定性,借鑒國外規范“柱-梁承載力級差系數”的思想,本文提出了對部分抗震等級的框架結構的柱端抗彎能力增強系數應予以提高,以降低框架柱屈服的可能性;參照國外有關規范的發展,本文建議對于正、負剪力反向且比值較大的框架梁宜增加交叉斜筋,以防止沿垂直裂縫發生嚴重的剪切錯動。
According to purpose of the towed flight , a new trajectory consisting of taking off , climbing phase , level flight phase is presented with . trajectory pitch angle of the towing plane is optimized . according to the flight law of the towing plane , the fin deflection angle and amplification coefficient of particle - system trajectory of carrier rocket are designed , in order to realizing flight steadily of the carrier rocker 根據牽引飛行的目的,對載機應用了“起飛?爬升?平飛”的變軌道飛行方案,同時對載機軌道的傾角、傾角變化規律進行優選設計;再根據載機的飛行規律,對運載器質點系軌道的舵偏規律及其放大系數進行了設計計算,實現運載器穩定牽引飛行。