For the simulation accuracy of springback problem in sheet metal forming, the effect of punch virtual velocity and sheet virtual density on the sheet strain energy was studied in this paper.
针对板料成形回弹精度问题的数值模拟，从理论上分析了凸模虚拟速度和板料虚拟密度对薄板变形能的影响。
The effect of punch virtual velocity and sheet virtual density on the sheet strain energy was studied in this paper.
从理论上分析了凸模虚拟速度和板料虚拟密度对薄板变形能的影响。
This paper has studied the influences of chemical compositions and hot rolling temperature on mechanical properties and magnetic flux density of magnetic yoke sheet.
本文研究了钢的主要成分，轧制温度对磁轭薄板力学性能和磁通密度的影响。
In order to meet steady compression -resilience properties as cylinder gasket, the thickness tolerance of composite sheet and the density of flexible graphite plate should be control.
为了满足汽缸垫稳定的压缩、回弹性能要求，应注意复合板的厚度公差和柔性石墨面材最佳的密度范围的控制。
The differential gain coefficient decreases with increased sheet carrier density.
微分增益系数随薄层载流子密度的增加而降低。
The laser power density and the temperature of post heat processing have great effect on the sheet resistivity and TCR of PTC thermistor, and there exist optimum values for these parameters.
激光功率密度和后续热处理温度对PT C热敏电阻方阻和电阻温度系数影响较大，并都存在一个最佳值。
The measuring methods of D C TIG welding arc anode sheet surface current density split sheet method and probe (made by ourselves) method were analysed and compared.
对直流TIG电弧阳极板表面电流密度的测量方法——分离极板法和探针（自制）法进行了分析比较。
The results indicated the arrayed rule, density and diameter of the drawing holes affect the limit drawing height of sheet metal drastically.
分析结果表明，拉深孔排列规律、密度和孔径变化对板料的极限拉深高度有很大影响。
With extending the period of hot water foaming time, the density of foamed sheet was decreased.
随着热水发泡时间的延长，泡沫塑料密度呈现负相关的联系。
The process comprises the steps of providing a fibrous sheet containing a high density of relatively short staple fibers having a decitex under 6.6;
该方法包括如下步骤：提 供含纤维的板，其含有分特数低于6.6的高密度的相对较短的人造短纤维；
Biaxial self-reinforced metallocene linear low density polyethylene sheet was prepared by the die with complex stress field in solid state.
主要采用一种具有复合应力场的挤出口模，通过固态挤出茂金属线性低密度聚乙烯获得双向自增强片材。
But the time extending enough, the density of sheet has small changes.
但时间延长到一定程度，发泡塑料密度变化不大。
The effects of plastic-sheet-covered cultivation, ridge culture, fertilization quantity and planting density on the yield of spring potato were studied.
研究了覆膜和垄作栽培以及施肥量和种植密度对春马铃薯产量的影响。
The effects of plastic-sheet-covered cultivation, ridge culture, fertilization quantity and planting density on the yield of spring potato were studied.
研究了覆膜和垄作栽培以及施肥量和种植密度对春马铃薯产量的影响。
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