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Hello All, OK I got one that I'm stumped on that came accross my desk. I have a hose that is 4in in diameter, 50in in lenght, and has a 3.5ft bend radius. Once 250psi is applied, what is the reaction forces at each end of the hose to keep it in a 3.5ft bend radius? I'm calculating the load...

Hello All, Let’s assume that an angle iron’s sides are being squeezed towards each other and pivoting at the elbow. On the stress plot you can see the stresses on the outside and inside part of the elbow. Now, some time in the past I do remember reading an article about stress concentration...

Hello All, For a Dynamic Shock Analysis what do I put in as the profile? It is asking for a spectrum, but is it the Shock Response Spectrum (SRS) which is in G vs Hz or the Power Spectrum Density (PSD) which is in G^2/Hz vs Hz? Thanks for your help in advance! Tobalcane "If you avoid...

Check it out: http://www.boston.com/business/articles/2008/12/02/boeing_engineers_approve_work_contract/ I’m not sure if this helps us or hurts us as a profession. What’s your view? Tobalcane "If you avoid failure, you also avoid success."

Hello All, I know that if springs are in series I can sum them like this 1/K = 1/K1 + 1/K2 … to get the equivalent spring constant. Do you know if I can do the same with natural frequencies? If I had the following (made up for this example): fn1=10hz, fn2=50hz, and fn3=30hz in series, can I...

Hello All, I am a heavy ProMechanica user, but I am being swayed into learning and using NASTRAN. What kind of third market books can you recommend? Also, is NEI NASTRAN the more popular one to use? Thanks in advance for any recommendations! Thanks Tobalcane "If you avoid failure, you also...

Hello all, I have to pick an isolator for a box at all four corners. The input would be a random vib profile. Not knowing what the Fn of the CCAs in the box, how would you pick the Fn of the isolator? Also, would you pick the Fn where you have the hieghest g^2/Hz or the lowest g^2/hz? Thank...

Now this is funny... "With Various, Penthouse says it will have revenue of $340 million this year, making it the world's biggest adult-entertainment company. " "Various was founded in 1996 by Andrew Conru, an entrepreneur with a doctorate in mechanical engineering design from Stanford...

Hello, Just wanted your opinion on "what is the difference between Ansys and ProM?" and "which do you feel is better?". I have to admit that I like ProM better because it is easier to use and I have correlated with hand calcs and emperical data so I feel comfotable with the answers. ProM is...

Hello, If I had an accelerometer with a sensitivity of 10mV/G, on the ICP Signal Conditioner, when and why would I go to X.1, X1, and X10? Will this change the senstivity of the accelerometer? If I go to X10 will it become more sensitive or less? Is X1 the default setting? Thanks in advance...

Hello, Im planning to by "Finite Element Analysis Theory & Application with ANSYS by Saeed Moaveni". Before I shell out $139 for it, can anybody tell me if it is worth it? Thanks! Tobalcane "If you avoid failure, you also avoid success."

Hello, I’m not an ANSYS user (I’m a ProM user), but will be one soon. My conundrum is that in the near future I will be getting data from a “force transducer hammer / response” shock test in the form of transfer function maybe in magnitude vs frequency. I have seen some animation done by...

Hi guys and gals, This is my first attempt into doing this so excuse my ignorance. In the near future, I will be getting data from a “force transducer hammer / response” shock test. Typically ME Scope (which I have never used) is used to find the different modes of the structure. A co worker...

Hi, I have posted this already in the ProM forum with no luck. So Im posting here to see if anybody in this forum can help me. Thanks you for your time. Hello, How would you handle a continues sin wave of maybe 25Hz at 1G in ProM? Im trying to simulate a vibe table with a UUT on it. And...

Hello, How would you handle a continues sin wave of maybe 25Hz at 1G in ProM? Im trying to simulate a vibe table with a UUT on it. And then using measures like response accelerometers to monitor points in question. So basicly I want to "hit" the table with a sin wave of 25Hz at 1G and then...

Hi, If one part has a hole pattern, how do you transfer it to another part? If I have two parts that I want to mate how do I get the hole pattern off of one and put on another? Thanks in advance! Tobalcane "If you avoid failure, you also avoid success."

Hi, Instead of using ProM's fasteners, has anybody used somthing else? Like beams or springs? I have three plates I want to fasten, but ProM's fasteners is to simple for this application. Thanks in advance for your comments... Tobalcane "If you avoid failure, you also avoid success."

I use the fasteners in ProM and sometimes the model does not want to mesh. I have used it in simple box models, but when I use it to hold brackets to plates and applications like that it does not want to mesh. Any idea what is going on? Im using the screw feature Any help or thought would be...

Hi guys and gals, I have done alot of analysis at the CCA level and have always used the "power" that was being used by the device as the heat dissipated. Well these days Im doing work with racks of equipment in a room. My logic is that the power the equipment is using is also the heat...

Hi guys and gals, I have a quick question on volume flow rates, if air is flowing thru a louver, will the CFM be the same at the inlet and outlet of the louver? And, the only thing that will change is the velocity (ft/min) of the air from the inlet to the outlet of the louver? Am I thinking...