I need to calculate a overall dBA value from a DRESP2 result in MPa. Please, how may I performed it?
How to calculate overall dBA for DRESP2, 20 from 20 Hz to 250Hz ?
DRESP2, 20 is calculating a RSS of 20 load cases in MPa.
$--.---1---.---2---.---3---.---4---.---5---.---6---.---7---.---8---.---9---.---0
DRESP1, 19, FLO, FRDISP,, M-TX, 80000001
DRESP2, 20, FLO_RSS, 125
+ DRESP1LV, 19, 1
+ DRESP1LV, 19, 2
+ DRESP1LV, 19, 3
+ DRESP1LV, 19, 4
+ DRESP1LV, 19, 5
+ DRESP1LV, 19, 6
+ DRESP1LV, 19, 7
+ DRESP1LV, 19, 8
+ DRESP1LV, 19, 9
+ DRESP1LV, 19, 10
+ DRESP1LV, 19, 11
+ DRESP1LV, 19, 12
+ DRESP1LV, 19, 13
+ DRESP1LV, 19, 14
+ DRESP1LV, 19, 15
+ DRESP1LV, 19, 16
+ DRESP1LV, 19, 17
+ DRESP1LV, 19, 18
+ DRESP1LV, 19, 19
+ DRESP1LV, 19, 20
$--.---1---.---2---.---3---.---4---.---5---.---6---.---7---.---8---.---9---.---0
DEQATN, 125, y(X1,X2,X3,X4,X5,X6,X7,X8,X9,X10,X11,X12,X13,X14,X15,X16,X17,
X18,X19,X20) = RSS(X1,X2,X3,X4,X5,X6,X7,X8,X9,X10,X11,X12,X13,
X14,X15,X16,X17,X18,X19,X20)
Answers
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You can use 3 type of responses in OS-optimization. How are you doing the calculation for what you need as the response?
DRESP1-these are defined responses in OptiStruct.
DRESP2-you can define your own function to using already defined responses(Dresp1) or more entities like grid etc. Define those-creating another response with name 'function'
DRESP3-you can use any external tool to do the calculations and bring in the result as a response.
You can use excel, Compose, C, etc.
OS-T: 4095 Size Optimization using External Responses (DRESP3) (altair.com)
OS-E: 0930 Optimization Using Compose Function for DRESP3 Response (altair.com)
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Altair Employee