Hello,
I am asked to estimate torque required to bring mating parts in contact that could have an initial gap.
A simple example could be an assembly similar to a shoe box with cover. If I were to provide fasteners on longer sides of the cover to assemble the cover to box, and if initially...
Hello,
I am asked to estimate torque required to bring mating parts together that could have an initial gap.
A simple example could be an assembly similar to a shoe box with cover. If I were to provide fasteners on longer sides of the cover to assemble the cover to box, and if initially there...
Hi All,
I need help with general guide lines to create a beam model for a complex assembly with steel and aluminum parts, that would match at least first few frequencies. Since customer wants a beam model, shell model is not an option.
For known cross sections (angle, channel etc.,) I can...
Hi All,
I need help with general guide lines to create a beam model for a complex assembly that would match at least first few frequencies.
For known cross sections (angle, channel etc.,) I can build the model. However, for complex assemblies with many subassemblies, I am...
Hi All,
I am new to ansys apdl and am not familiar with the coding. I know I am not doing this right.
Can someone help me with this code. I am trying to write x, y and z displacements to arrays dx, dy and dz
I appreciate your help!
Thank you,
Dipak
/post1...
Hi,
I know a code (J script) can be written to export the maximum and minimum values of Von-Mises stress results for all components in a FEM model to a text file that can be imported into excel.
Can anyone let me know if this has already been done?
Thanks in advance for your help!
- Dipak
Hi,
I am new to ANSYS. In my model I have four ball joints. However, due to the modeling error in CATIA, one of the ball joint resulted in an interference fit and remaining three have 0.06" gap in ball and socket. Ideally all four ball joints should have been the same.
When I set...
Hi,
I need help regarding test setup for determining relative displacements using accelerometers at two locations during random vibration.
We had done this before about 6 years back but I have forgotten the details.
1. Install two accelerometers at two locations
2. Take output...
Hi,
I am getting wrong results and hence trying to figure out if I am computing FFT from time domain data right.
Here is the code for matlab (MATLAB 7.5.0; R2007b).
AllData.dat file contains time in first column and X moment in the 5th column.
load AllData.dat;
Time = AllData(:,1);
Mx =...
All,
Does anyone know about "KG 80" lubrication oil for instrument bearings? The only reference that I have for this oil is MIL-L-83176A. I am looking for the vapour pressure versus temperature characteristics for this oil and a source where I can find more information on this oil...
All,
For ASTM A 666, (301 full hard), from -25 deg C to 60 deg C, I am wondering whether the material would be susceptible to creep as data for such low temperature do not exist.
I did extensive survey on creep. Creep is unimportant below temperatures close to 0.3 times...
All,
We are using a 0.148" wide, 0.45" long and 0.008" thick SS 301 full hard strip to preload another component. The strip has two clearance holes at both ends. Two M1.6 socket head cap screws are used to preload the strip.
So basically, it is a fixed beam with a center load...
All,
We are subjecting an instrument to random vibration along 3 axis. Low level (0.25 g) signature sweeps are performed before and after the random vibration.
Random vibration along first two axis went well. For third axis pre random signature sweep had a distinct peak at 135 Hz...
All,
We have an instrument that uses two angular contact bearings. These bearings are separated by porous polymide material that serves as lubricant retainer. The lubricant for the bearings is Apiezon C.
This instrument will be kept in storage for 7 years.
In view of this...
I have following specification for a DC Motor:
Operating Voltage: 28 VDC ± 0.56 VDC power bus
Number of Phases: 3 (connected in Delta)
Number of Poles: 24
Resistance: 15 ohms
Torque Sensitivity 275 ounce-inch/amp
Power: 3.4 Watts
RPM: 31.6
Maximum current then would be Operating...
Microphonics
Hi all, I would appreciate any help in understanding testing for microphonics.
We have following requirements on Oven Controlled Crystal Oscillator (OCXO) when subjected to the random vibration level of 0.01 G^2/Hz from 20 to 200 Hz and the sinusoidal level of 0.1 G peak to peak...
