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对济南遮阳蓬进行裁剪制作方法介绍

来源: 发布日期:2017-02-14 11:06:45

1.裁剪办法简介
1 cutting methods introduction
济南遮阳蓬的裁剪拼接过程无论如何都是会有差错的,这是由于首先用平面膜片拼成空间曲面就必定会有差错,其次膜布是各向异性非线性资料,在把它张拉成曲率改变无常的空间形状时,不可避免的会与初始设计形状有收支。迄今为止,已建立了很多种办法来处理这一疑问。很难评估哪个办法的精确度必定就高,但还是有几个标准能够用来判别这些裁剪办法是不是有用。那就是可靠性、灵活性和完结时间。
The awning cutting stitching process in Ji'nan in any case is there will be errors, this is because the first planar diaphragm space surface will make mistakes, then the membrane cloth is anisotropic and nonlinear data, in the shape of its changeable curvature Zhang Lacheng, with the initial design shape can avoid income. So far, many methods have been developed to deal with the problem. It is difficult to assess which method is of high accuracy, but there are several criteria that can be used to determine whether these cutting methods are useful. That's reliability, flexibility, and end time.
2.济南遮阳蓬交互式裁剪过程
2 Ji'nan awning interactive cutting process
安置济南遮阳蓬外表裁剪缝时要思考以下几个要素:
To set up the appearance of the outer surface of the Ji'nan shed cut to consider the following elements:
1)外表曲率
1) apparent curvature
曾经的裁剪办法都无法给出曲面任一点处的曲率。而本软件由于选用的是曲面膜单元,所以能够得到每个单元的曲率。假如相邻单元曲率相差很大,阐明在这个方位,曲面歪曲的很严重,假如裁剪缝在此处不切断重新开始,那么裁剪膜块的鸿沟在此处就会有很大的弧形。从相邻单元曲率的改变趋势,能够判别出测地线的大致走向。
Once the cutting method can not give curvature at any point on the surface. The software is chosen as the curved mask unit, so the curvature of each unit can be obtained. If the adjacent cell curvature difference, clarify in this range, the surface distortion is very serious, if cut and sew in here is cut off again, then divide membrane block has a great arc here will. From the changing trend of the curvature of adjacent elements, the general trend of geodesic lines can be determined.
2)膜资料的幅宽
2) film data width
找形分析过程中的平面网格划分时,就要思考到膜资料的幅宽。尽量使一块膜布中包括的膜单元是完整的,不然还要经过插值核算确定膜块鸿沟点的方位。
The form finding analysis of planar mesh in the process, it is necessary to think about to film data width. As far as possible to make a membrane cloth, including the membrane unit is complete, or even through the interpolation calculation to determine the direction of the film block point.
3)鸿沟的走向
3) the trend of divide
假如鸿沟对比平直,能够思考用一个膜块的长边作为这条鸿沟。不然只能用多个膜块的短边拼接成这条鸿沟。
If the gap is flat, think of the long side of a membrane block as the gap. Otherwise, we can only use the short edge of a plurality of film blocks into the gap.
4)美丽
4) beautiful
由于济南遮阳蓬具有透光性,实践构造中能够清楚地看见焊缝,所以裁剪缝的安置一定要规矩、合理,最佳能构成一些美丽的图画以添加构造的美感。假如膜外表设置有压索或脊索, 那么最佳使裁剪缝与压索或脊索重合,使索不至于打乱焊缝的图画安置。
Because the Ji'nan awning has the light transmission, in the practical construction can clearly see the welding seam, therefore the cutting seam placement must be reasonable, the reasonable, the best can form some beautiful pictures to add the structure esthetic sense. If the film surface is provided with a press cable or notochord, then make the best cut and sew with pressure cable or notochord coincide, the cable without interrupting the weld picture placement.
 

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