Harishbm:
Come on... If you can’t provide a more meaningful sketch of what you’ve really got than that, you are not very likely to get much meaningful help here on E-Tips. We just can’t see it from here. Is it an existing draft gear, or is that what you are trying to design? What are the various major components, the draft arm, the center sill, the car body, etc., and how are they arranged? Who are you doing this for, a railroad, a car builder? You guys get so lost in your computer software that you can’t even see the various parts of your engineering problem, and you certainly don’t do a good job a describing it, and apparently don’t really understand it. I can’t help you much with your software, but I know a thing or two about railcars. You have to use your engineering judgement to provide the correct input, and the software might still not give you all the answers, and you better know the difference.