I have used Boolean (Subtract) operation to convert multiple bodies and parts into 1part, 1body. But after this conversion, the volume and surface area become zero. Please suggest, how to solve this problem?
First of all, subtract does not utilize merging. If you wanted to deduct a geometry from another one, so, you should use subtract. In this condition to merge you should use unite instead of subtracting. Furthermore, I suggest you merge your components in the Solidwork and then importing in the design modeler. You can follow the link below to learn how you can merge various components into one in Solidworks:
I have tried that also as I have merged the components (5bodies,5parts) in Solidworks and imported here,then it comes as 1part 1body, which is desirable. But even then also I am unable to get that surface area and volume of that body in ANSYS Design Modeler.
I suggest, please watch carefully the video tutorial that I leave you in this link: https://www.youtube.com/watch?v=5fOVVacUUGQ This information will be very useful to you.