www.uggbootst.com MathCAD software simulation of t

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MathCAD software simulation of the vibration of plastic foam

Material relaxation time has little effect on the bubble oscillation. Different relaxation time, the bubble oscillation period, amplitude and vibration frequency of almost no change, three curves fit together. That is the relaxation time of polymer melt vibration has little effect on the foaming,[link widoczny dla zalogowanych], the foam vibration parameters on the overall situation has nothing to do. 2.5 The density of polymer melt on the bubble vibration changes the density of polymer melt, look at the other conditions remain unchanged under the influence of bubble oscillation. It can be seen in Figure 4,[link widoczny dla zalogowanych], with the liquid density increases, the bubble oscillation frequency decreases, the density of liquid from the mouth of I = f a 600kg / m. Add a 93 - 33, 2004 plastic No. 5 MathCAD software simulation of plastic foam vibration eight A, \, \ \ / \ plant, 『VVt / us a master Martin one. To p1-900kg / m. Bubble oscillation cycle is from the 0.4s into 0.6s, the radius of the bubble is almost no vibration, so come on bubble liquid fluid density affect vibration cycle,[link widoczny dla zalogowanych], the radius has no effect on the vibration. This is because under certain conditions. Density of decision quality, influence the size of the object inertia, density, means that the inertia vibration system, vibration system, the smaller the acceleration, the vibration frequency is smaller. 3 summarizes the simulation can be drawn from the above: 1) the pressure difference inside and outside the bubble within a certain range will have a bubble vibration (in ideal conditions, the smaller the pressure difference, the more prone to vibration); 2) the surface tension of polymer melts The larger the radius the smaller the bubble vibration, vibration frequency is higher; 3) the relaxation time of polymer melt has little effect on the bubble oscillation; 4) the greater the density of polymer melt, the smaller the bubble vibrations. Head Head I_861.431.002.29 Head 1.861.431.002.29 2.29 1.861.431.00,, fl A, I, v-Ot/us,, J,,, Jl, U ,,,, IVOt / us ,,,,, \ / \ a, _, I,, -, 201.22.43.64.86.0t/us Figure 4, the density of polymer melt curve of vibration of the bubble 1. Pg0 an O. 4963MPa, PI a 0.1013MPa,[link widoczny dla zalogowanych], lDf a 600kg / m. ; Curve 2. Pg0 an O. 4963MPa, Pb-O. 1013MPa, P 』= 800kg / m. } Curve 3. Pg0 an O. 4963MPa, Pb-O. 1013MPa, lDf = 900kg / m. .

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