positive quantity

The concepts of revised quantity and revised coefficient of die dimensions are put forward by analyzing to dimensions change of gear warm forming and FEM simulation.

通过对齿轮温成形时尺寸变化进行理论分析及有限元模拟 ,提出了模具尺寸的修正量与修正系数的概念 ,并求出了 45号钢在 80 0℃温成形齿轮时的修正系数值k值 ,从而使得对齿轮温变形模具进行精确的修正成为可

It can be used to calculate,for example,the correctness of laying out route,interval between multi curve,entry relation of curve tunnel,deviation angle of curve bridge,data for setting out curve,and so on.

应用这一模型可使铁道工程中拨正量计算、复线间距计算、曲线隧道进洞关系计算、曲线桥梁偏角计算、曲线测设计算等几项繁杂的计算变得非常简便、通用而且精确。

In this paper, an identification model of correction mass of a rotor system with slowly time-varyingphysical parameters is established on the basis of the influence coefficient method together with the properties of on-line automatic rotor-balancing.

本文在动平衡影响系数法的基础上结合在线动平衡的特点，建立了慢时变参数转子系统动平衡校正量的辨识数学模型；根据多层递阶预报辨识法的基本思想，针对建立的漫时变参数转子系统动平衡校正量的辨识数学模型，提出了具体的无试重辨识方法。