三层板

对三层板均采用Mindlin板单元，以各层的中面为坐标平面建立局部坐标系来建立有限元模型，芯层材料的粘弹性采用常复数模型。

Mindlin plate unit is applied to all three plates , local coordinate system with middle surface of each plate as coordinate plane is used to build finite element model , and constant complex number model is applied for interlayer material 's viscid elasticity .

将三层板都看成Mindlin板单元，以各层的中面为坐标平面建立局部坐标系来建立有限元模型，考虑了偏心阵的作用，大大简化了计算程序。

The three layer is taken as the Mindlin plate element , the finite element model is established in the local coordinate system that is based on the median plane of each layer , the eccentricity matrix is considered , which make the program more simple .

用斜探头激发的兰姆波对三层板参数进行反演测试研究

Inverse determinations of the parameters of three-layered plate using angle probe generated Lamb waves

并利用气胀成形制得了三层板和四层板结构件。

The three-layer structure parts and the four-layer structure parts were formed using the blow-forming .

本文导出了具体各向同性夹层等厚度表板组成的三层板的基本方程和应变能表达式。

In this paper the basic equation and the strain energy for the rectangular sandwich plate ( with a soft care and surface layers of equal thi ckness ) are derived .

通过焊缝表面成形质量分析，焊缝截面形貌分析，力学性能及金相组织分析，得出了焊接工艺参数及上下间隙对三层板的焊接质量影响规律。

Through analyze the quality of weld surface and weld section surface , mechanical properties and micro-structure analysis , the influence of welding process parameters and clearance on welding quality of three layer board welding was obtained .

分析了通用板壳理论中的公式特点，根据刚度等效原理，给出了三层板的刚度等效计算过程，推导出了三层板的等效弹性模量和等效厚度的计算公式。

After analyzing the characteristics of those adopted formulas and using the principle of stiffness equivalence , the calculating process was given out ; the formulas of the equivalent elastic module and the equivalent thickness were deduced .

在算例中，直接把三层板的等效弹性模量和等效厚度代入通用板壳理论的公式，计算出了弹性基础上三层圆柱壳体的位移.通过数值计算对刚度等效方法进行了验证。

In the following example , The equivalent elastic module and the equivalent thickness were taken into the formulas of the general thin-shell theory , and the result of the three-layer column shell based on the elastic condition was obtained , which was further verified by numerical calculation .

简要介绍了两等分、三等分层板包扎时逐层相错角度的确定方法，提出了实际生产中相错角度的选用档次。

In this article , it briefly introduces the determination method of the mutual staggering angle of two equidistance and trip equidistance plate wrapping when wrapping the plates layer by layer and gives the selection class of the mutual staggering angle dural the actual production .

根据三层不锈钢板电阻点焊熔核形成过程，建立了模拟三层板点焊温度场的轴对称有限元模型。

An axisymmetric finite element model is developed to simulate the temperature field of resistant spot welding according to the process of nugget formation of three layers stainless steel sheets .