ACIS 和 Parasolid 两种实体造型内核区别

CAXA实体设计ACIS 和 Parasolid 两种实体造型内核
CAXA实体设计 具有 ACIS 和 Parasolid 两种实体造型内核,用户可以根据需要灵活地选择内核。
这两种实体造型内核什么作用,有什么区别呀,请高手指点一下。

A、P都是三维实体内核。
内核只运算实体的表面,如果零件比较简单,A内核比较节省计算资源、节省存盘空间。
不过A内核在数据转换的时候,容易出现丢面现象–因为没有实体的质感和张力。

内核运算实体从表面到内部的每一个点,如果零件较为复杂,碎面较多,P内核反而更加节省资源;
而且 P内核在数据交换时,丢面的现象比较少–因为实体是有张力、有质感的,要么整个零件丢掉,不会说只丢几个曲面。

当然,你用P内核画完,存成iges或者Sat 还是有可能出现丢失情况的(因为相当于转成别的内核了)。
用P画完,直接存成 X_T,在软件之间交流 99.9%都没有问题,目前我在寻找有问题的那0.1%,遇到问题的麻烦通知我 *^_^*

但是A内核就是另外一回事了,即使存成Sat、iges,用P内核软件打开,一般丢面的概率有20%以上。
实体设计在双内核、数据兼容方面巨好,读iges的丢面率不超过3% 。

所以建议大家设计的时候最好用P内核,资源不够就加内存。
A内核只用于对外部软件的接口方面吧。

其实 实体设计 这方面比较傻瓜,
即使用某一个内核画完,选择零件 Ctrl+K就可以切换到另外一个内核了。

但是注意,两个内核的算法是不一样的、尤其是过渡、倒角、曲面的算法,
有些过渡或者曲面在切换内核之后可能丢失,要重新构造;
建议在切换之前把零件进行”组合图素”运算,算成一个整体先,再转换内核,这就没有问题了。
(组合之前可以Ctrl+C、Ctrl+V在原位置备份一个。)

A内核和P内核应该是各有优劣;
A内核作曲面还是非常不错的。

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