| 1. | 2 . the iterative formulas of elastoplastic stochastic finite element method under cyclic loading were deduced
推导了交变载荷下弹塑性随机有限元法迭代格式。 |
| 2. | In addition , the paper makes a research into fft in asynchronous sampling from the angle of iteration , and obtains a iterative formula
此外，本文从迭代收敛的角度研究了非同步取样时的fft ，得出了一个迭代公式。 |
| 3. | We have deduced the iterative formula by the theory of the dynamic system , proved that the quadratic convergence holds under the weak conditions , and done the numerical experiments
利用动力系统理论推导出该方法的迭代公式，证明其在某些弱条件下至少是二阶收敛的，最后给出了数值结果。 |
| 4. | This paper develops iterative formula of sine and cosine function in document [ 40 ] , and presents new pixel - level algorithms for generating archimedes and involute curves which are widely used in engineering
本文推广了文献[ 40 ]中正弦、余弦函数的递推公式，对工程绘图中常用的阿基米德曲线和渐开线设计了新的逐点生成算法。 |
| 5. | To perform the optimization analysis , a new numerical simulation method , named as dual - velocity algorithm for flow calculation on collocated grids ， is developed and the iterative formulas of the optimization principles are presented
为了用数值方法研究传热过程的优化，发展了一种基于同位网格的流场计算的双速度算法以及描述各优化原则的迭代过程。 |
| 6. | According to the complication of cyclic loading the aeolotropism and bauschinger effect resulted form plastic deformation were reflected by the kinematic hardening model , the transient stress - strain relation was described by jhansale model in the iterative formulas
在迭代格式中，针对复杂的交变载荷，采用运动强化模型，反映了塑性变形引起的各向异性和包辛格效应，运用jhansale模型描述材料的瞬态应力应变关系。 |
| 7. | The accuracy of reliability calculation was improved in the derivative sfem method . the local derivatives of fem and numerical method were used to obtain the iterative formulas of the performance function ' s local derivatives . the procedure is relatively simple and adaptable to engineering application as the stiffness matrix formed and decomposed only once
偏导sfem可靠度法求解构件疲劳可靠度，可靠度计算精度得到改善，通过有限元求偏导，结合数值微分技术，推导出了功能函数的偏导迭代格式，只需一次形成和分解总纲，计算较简便，适合工程应用。 |
| 8. | To obtain the parameters of measuring magnetic circuit structure , theory research is done . theory research based on overrelaxation : according to electromagnetic theory fundamental equation , boundary condition is analyzed , iterative formula is deduced , overrelaxation factor is selected and calculation program is composed
并根据麦克斯韦电磁场基本理论建立了磁路结构模型，使用超松弛迭代法对测量磁路结构的磁场进行了理论分析，得到了适于用在行程传感液压缸行程测量的磁路参数之间的关系。 |
| 9. | Second , to solve the local stability problem of the bar under pressure , a function relationship between the sectional area and the inertia moment is established by using the similar transformation . accounting to the critical pressure stress , iterative formulas are derived which include big , middle and small flexible degree
其次，对于桁架结构中受压杆件的失稳破坏，本文提出采用相似变换方法找到截面积与惯性矩的关系，根据压杆的临界应力分别导出大、中、小柔度的迭代公式，设计出压杆的截面积。 |
| 10. | A normal transform is introduced , and there are enough much grids in the region between the critical layer and the wall , where the variation of the disturbance is the quickest . the finite - difference of governing equations with fourth - order accuracy in the normal direction is utilized in full regions including points close the wall , and is very important for accurately discreting equations . the combination of global and local methods is implemented , and a new iterative formula is derived
对于曲线坐标系下的抛物化稳定性方程,文中发展了求解的高效数值方法:引进法向变换,使得在临界层与壁面之间的扰动量变化最快的区域有更多的法向网格点;导出包含边界邻域在内的完全四阶精度的法向有限差分格式,这对方程精确离散至关重要;采用全局法和局部法相结合的方法及其新的迭代公式,大大加速收敛并得到更精确的特征值。 |
