It's right that the greater contribution to acoustic field comes from the ends of the rod ... but I would like also to consider the influence of the expansion and contraction of cross sectional areas of the rod due to the Poisson modulus of the material ... in fact the rod is not so thin...
Obviously when I say "in his n-th (generic) longitudinal natural mode of vibration", I mean that I have to predict the acoustic field: first when it is vibrating in the first frequency, then for the second, and so on ...
Hi all,
I have to predict through LMS Virtual Lab Acoustics (Sysnoise...) the acoustic field radiated from a rod (of known geometry) wich is vibrating in is n-th (generic) longitudinal natural mode of vibration, with a known amplitude. Could anybody help me on how to solve this problem? Could...
Regarding acceleration noise, could it be studied in sysnoise leading an acpustic FEM transient (time domain) analysis? To do this I should put as boundary conditions the velocities of the surfaces of the impacting bodies during and after the impact. Now the questions are 3:
Is Nastran able to...
It's a work for a local company wich produces hydraulic breakers. The breaker object of this study is not intended for hand use, but to be mounted on the articulated arm of a big machine. The purpose is to try to understand the mechanism of production of noise in order to take design provisions...
Hi,
I have to predict and calculate the noise emitted by a hydraulic hammer. The center of the problem is to calculate the noise emitted from the axial and central impact between two steel cylindrical (more or less) objects: the impacting mass and the tool. The noise is composed by a "ringing"...
