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            ACTRAN Acoustics workshop基礎課程培訓

             
               班級規模及環境--熱線:4008699035 手機:15921673576( 微信同號)
                   每期人數限3到5人。
               上課時間和地點
            開課地址:【上海】同濟大學(滬西)/新城金郡商務樓(11號線白銀路站)【深圳分部】:電影大廈(地鐵一號線大劇院站) 【武漢分部】:佳源大廈【成都分部】:領館區1號【沈陽分部】:沈陽理工大學【鄭州分部】:錦華大廈【石家莊分部】:瑞景大廈【北京分部】:北京中山學院 【南京分部】:金港大廈
            最新開班 (連續班 、周末班、晚班):2020年3月16日
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                    1、培訓過程中,如有部分內容理解不透或消化不好,可免費在以后培訓班中重聽;
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            課程大綱
             

            1 1A Description of Actran workshop

            1 To import an ACTRAN input file and check the content of it

            2 To export both the mesh and the input file

            3 To launch in different ways the input file

            2 1B-1 Example of sound source in a treated cavity(foam layer)

            1 One considers the same cavity as in workshop 1A but one layer of fluid elements is replaced by a foam layer

            2 Sound in enclosure: a spherical source is placed in one corner of a 1m3 cavity wuth 5 rigid walls and a foam layer

            3 A 0.125m thick foam layer is glued against one of the cavity walls(from y=0.375m to y=0.5m)

            4 Use rigid porous elements

            3 1B-2 Training of Kundt's tube

            1 Problem description and models

            2 Workshop description

            3 Using BOXPRO as a pre-processing tool

            4 1C Using equivalent admittance

            1 One considers the same cavity as in previous workshop

            2 The spherical source placed in one of the box corner at (x,y,z)=(-0.375,-0.375,-0.375)

            3 Use an admittance boundary condition for modeling the foam

            4 Computed results(compare with workshop 1A)

            4.1 The mean square pressure amplitude from 1Hz to 500Hz

            4.2 The sound pressure level at the center of the box

            4.3 Plot a color map at 295Hz

            5 2 Model extraction: acoustic cavity

            1 One considers a 1m3 cavity, centered on the origin(0,0,0)

            2 One considers default air properties for the fluid and assumes the walls to be rigid

            3 Use quadratic, 0.125m sized elements

            4 Post- processing:

            4.1 Extract the modes in the 1Hz to 500Hz frequency range

            4.2 Plot a color map of 7th mode(order(m,n,l)=(1,1,1)) and compare it with the workshop 1A map

            6 3 Free field radiation of a monopole

            1 Purpose: free-field radiation of a monopole in air at standard conditions

            2 Plot the real part of the pressure from 1Hz to 500Hz measured at (x,y,z)=(1,0,0)

            3 Plot the sound pressure level from 1Hz to 500Hz measured at (x,y,z)=(1,0,0)

            4 Visualize a map using cutplanes functions

            7 4 Duct radiating in free field

            1 One considers a simple duct radiating in a half free space

            2 The duct is excited with each mode propagating at 700Hz

            3 Compute the pressure variation along the duct axis

            4 Plot a color map

            8 5A BC_MESH application: structure radiating in a free field

            1 The objective of this workshop is to evaluate the acoustic radiation of a simple vibrating structure

            2 The parameters of the problem

            3 The displacement of the edges of the panel are set to 0

            4 The excitation is displacement at the center of the plate

            9 5B Training

            1 The objective of this document is to explain how to create an ACTRAN model in order to compute the acoustic radiation of a vibrating structure

            2 This training is based on a gearbox model

            10 6 Visco-thermal effects in Actran

            1 Visco-thermal elements in Actran

            2 Purpose: understand the visco-thermal effects occurring in a thin circular tube connecting to acoustic cavities

            3 Plot the SPL of the pressure from 10Hz to 3000Hz measured at (x,y,z)=(0.05,0.6,0) for 2 cases: with and without visco-thermal effects in the thin tube

            4 Plot the average SPL in the different cavities

            5 Visualize pressure maps at some frequencies of interest

             
              備案號:備案號:滬ICP備08026168號-1 .(2024年07月24日)....................
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