WINISD Pro, Moving mass help? - AVS Forum
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post #1 of 7 Old 08-19-2014, 03:39 PM - Thread Starter
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WINISD Pro, Moving mass help?

Hello!
Just a quick inquiry about WINISD Pro, i am currently designing a Passive Radiator design and want to know, does the

'Added mass to cone'

take into account an estimation of the current MMS of the driver, or is it saying if the weight of added mass and driver MMS is X It will give this output?

for example if i type 380 Grams, will that be 380 grams of just added mass onto the current driver mass (380g added) , or will it be the total mass of both the driver mass and the added weight (MMS = 200g and 180g added)

Thanks in advance!
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post #2 of 7 Old 08-20-2014, 01:29 AM
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Is the MMS of the driver not already contained within the driver specifications that you selected before you started the modelling?

If so, I would have said that the 'Added mass to cone' must be the additional mass you are adding.


Although the above is my guess based on logic, and we all know that computer stuff does not always follow logic... lol

Hopefully someone with more WinISD knowledge than me will post shortly!
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post #3 of 7 Old 08-20-2014, 01:34 AM
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with no added mass, you are looking at the mms of the passive radiator alone. that is captured by fs. if it wasn't fs would be infinity.


when mass is added, fs drops.


so in your example, when you enter 380 g, that is 380 g added to the mms of the passive radiator by itself.

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post #4 of 7 Old 08-20-2014, 01:55 AM
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Thanks for confirming, LTD!
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post #5 of 7 Old 08-20-2014, 04:08 AM - Thread Starter
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Oh thanks guys,
so even though i didn't add the mms in the driver specs, it is already considered through the FS of the driver yes?
so the "added mass to cone" and results seen when i change it refers solely to what i add to the already existing cone?
Thanks guys haha, slowly getting there
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post #6 of 7 Old 08-20-2014, 08:01 AM
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Yes, adding mass will reduce the Fs.

So say the mms is 380 g, and you add 20 g to it, then you make the mms 400 g, and the Fs will drop slightly.


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post #7 of 7 Old 08-20-2014, 08:53 PM - Thread Starter
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Thanks heaps! Got it all sorted
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