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it is in btween a an SUV and Pick Up. The nuber I gave is an arbitrary number. I wnated to know, how to fix the vertical bending stiffness target? what is the theory or justification for fixing a particular target nuber. Regards sasank

Thanks for the information. But, I wnated to know, how do we get the individual bracketry stiffnesses measured during the test. What boundary conditions they use for testing. Also, another question is suppose if we want the bending stiffness of BIW or frame to be say around 4000 N/mm, what is...

Hallo! can anybody tell me how an automotive frame (SUV or pickup) tested for static stiffness? Can we simulate this in FEA? If so, what boundary conditions we have to use to get the FEA results close to real time testing. Regards sasank

Greg Thanks for the reply. But, my question is can we validate this stiffness with some kind of test or theotically? Regards kamalakar

Let me be more clear. My intention is to find the equivalent static stiffness at '0'Hz. displacements are my outputs from the analysis. (SOL111). I am finidng the static stiffness only without constraining the frame Regards Sasank

Hallo! all when we look at the stresses in a component, generally we ignore the stresses at the bolt hole locations. The reason for this is the way we model, the bolt hole(with RBE2's). My question is how do we judge the stresses around the bolt holes? In some cases we may not ignore them!!!

Hallo! I am running point mobility to find out the '0' Hz equivalnet static stiffness of bracketry of a typical SUV frame.Calculating the deflections and from deflections calculating the stiffness. Aim is to find out the equivalent static stiffness in a free-free conditions. But, I do nothave...

Hi, can anybody expalin me what is a flex mode in modal analysis? What is the significance of low frequency modes of an automotive frame/cradle? Thanks sasank

Hallo! Can any body explain me what is the bushing rate (refering to body mounts). How to decide how much bushing rate required. Thanks Sasank

Thanks for the quick response.

Hallo! Can any body explain me waht the following load cases stands for 1) 30 mph Chuckhole Vertical(Aft/Right) 2) Curb Island LF Vertical 3)Forward Wide Open Throttle 4)Forward Panic Bracking and 5) 73 degree SEPH LF Impact

Hallo! Can anybody explain me what is Point Mobility ? and What is a Transfer function? What is the relation between these two ? The resons I am asking these questions are I have to run point mobility analysis for an engine mount bracket which is coming on to a cradle. Regards Sasank

Hallo! Can any body explain me how to check the mesh convergence. i.e, How we can decide whether the FE mesh of 100 or 200 elements will yield correct results? Is there any criteria to decide the number of elements in a FE Mesh

Hi, Can any body explain me or suggest me a web site on How to do the Conatct analysis? Any material available for an easy understanding about contacts. I wnated to do crash simulation of automotive frames. Sasank

Thanks for the information Sasank

Guys, Thanks for response. I have another question? If we look for acceleartion response, and plot the acceleartion Vs Frequency graph, How can we use this information? To be more clear, suppose if I get the peak response (acceleration ) in the rane of say 150-200 Hz, How this information can be...

Hallo! Can any body suggest me , where I get some useful information about the Frequency Response Analysis of automotive frames and cradles. The information I need is How & why to do frequency response analysis? What output is required from this analysis? and How we can utilize this information...

Thanks for the reply. I wanted to know some more information about frequency reposnse ana;ysis. To my knowledge, there are three methods in frequency response.They are 1) Displacement appraoch 2) Velocity approach 3) Acceleration approach My question is which of these approaches, we need to...

Hi, I have to do frequency response analysis for automotive frames and cradles. Before starting the analysis I have some questions. Can any body please answer my questions? My questions. 1) What is frequency response analysis ? 2) what is Low frequency and High frequency responses. 3) When and...