ATV计算出错

张倍

对某列铁路客车进行声学计算
使用BEM DIRECT INTERIOR ELEMENT
选取车内某点进行ATV及面板贡献度计算，但是在计算完ATV、求解模型后，求解场点时提示错误：

LOADING POTENTIALS    FROM DATABASE at Frequency    144.000 Hz
ERROR - CANNOT FIND RECORD OF TYPE POT1

ERROR - COULD NOT FIND POTENTIALS AT     144.00 HZ

看了主任pengweicai关于ATV计算的帖子后，尝试不进行场点计算，直接求面板贡献度，结果还是提示错误。:'(

请教大家如何解决

w89986581

ATV必须设置场点，因为它是场点的函数。

张倍

问题已解决。需要设定场点，但是不进行Process Field Points求解。
Field points for which the acoustic frequency response should be determined using
an ATV−based response analysis can be defined using the Geometry, Field Point
dialog, in a way identical to a “conventional BEM”response analysis.  However,
unlike a “conventional” response analysis, an ATV−based response analysis:
1. requires the definition of field points prior to computing the ATVs, as both
ATVs and Modal ATVs depend on the field point locations
2. does not require the Analysis, Process Field Points... step to obtain the
field point pressure responses
As the pressure responses are obtained in a collection of field point locations by
a simple matrix multiplication, no information is available on the acoustic radiated
power emitted by the vibrating structure.  In addition, unlike is the case in a
conventional BEM response analysis, it is impossible to obtain the “Power radiated
through the Field Point Mesh”by executing a Field Point Post−processing
computation.  For this purpose, the concept of the “ISO” field point mesh should
be used.
以上英文说明摘自5.6help


并且在计算过程中发现，compute之后进行一次slove,然后再改变parameters，计算contribution,就不再出现先前发现的错误了