بحث بعنوان Hammer-3D and Shaker-3D

بحث بعنوان Hammer-3D and Shaker-3D
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22 يوليو 2021
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Hammer-3D and Shaker-3D
Modal Test, Analysis, and Animation Software for the Hewlett-Packard 35670A Dynamic Signal Analyzer
Identify Noise and Vibration
Problems On-Site
Track down noise and vibration problems quickly and easily using
HAMMER-3D and SHAKER-3D software. Be guided through modal
test, analysis, and animation without the burden of file management or
data compatibility. Animate your structure’s mode shapes on the HP
35670A screen. Generate a modal analysis report. Send mode shapes
to a plotter, printer, or file. HAMMER-3D and SHAKER-3D are the
solutions you need for vibration and noise troubleshooting.
Modal Measurements
Have Never Been Easier
HAMMER-3D and SHAKER-3D make you the measurement
expert. HAMMER-3D has self-paced routines to help you with
modal measurements using an impact hammer. High quality data
is assured because HAMMER-3D coordinates all aspects of your
measurements: range, trigger delay, exponential window time
constant and overload protection.
SHAKER-3D uses the powerful capability of the HP 35670A
source to automatically measure frequency response with
electrodynamic shakers. Hands-off measurements are
accomplished via software-controlled algorithms to set force
level, autorange, average, and finally store FRF results. All you
need to do is move the accelerometer when prompted!
Analyze and Animate
Curve fitting and animation take just minutes. Select the proven,
reliable HP 5423A polynomial curve fitter, identify modes of
interest, and in a short time you will see an animated mode shape
on your screen. Analyze and animate 40 measurement points
with five modes in less than three minutes!
No PC Required!
Run HP Instrument BASIC within the HP 35670A and no
external PC controller is required. No file management
headaches. No IRQ crashes. No data transfer problems. You
don’t need an expensive, portable PC to get the results you need.
All you need are the basic tools: HP 35670A with HP
Instrument BASIC, an accelerometer, a modal impact hammer
(or a shaker excitation system – shaker, force transducer, and
stinger), and HAMMER-3D or SHAKER-3D software.
View
Disston 26 in. Crosscut Saw
Test Date: 8/16/93 Test File ID: DS
y x
z
SS&V SHAKER
Mode #3
Frequency
63.21 Hz
Damping
0Hz AVG: 2 3.2kHz
X:366.2109 us Y:17.783 lb
-15ms 235ms
-15ms 235ms
A: Freq Resp2/1
B: CH1 Time
X:1.936 kHz Y:26.1346 g/lb
100
g/lb
.01
30
lb
-20
C: CH2 Time
D: CH2 Win Time
10
gpk
-10
10
gpk
-10
-15ms 235ms
Change settings. Select SEE CHANGES or ACCEPT PARAMETRS.
AVERAGE COMPLETE
Span
3200
Ctr.Freq.
1600
Zero
Start
TrigDelay
-.016
Force Exp
Window
SEE
CHANGES
ACCEPT
PARAMETRS
Pause
MainMeasurement Set-up
Portable, Fast, and Easy
HAMMER-3D and SHAKER-3D will identify vibration
motion problems on-site quickly. Specify measurement points
and transducer data, then let HAMMER-3D and SHAKER-
3D automatically sequence through modal test, analysis, and
animation. All results are stored on disk for later examination.
Reports and mode shape plots complete the process.
Specify Structure, Transducers
Represent a structure with up to 99 points connected by up to
400 line segments. Each measurement point is allowed up to
three axes, each in any specifiable direction.
Enter measurement point coordinates and accelerometer
direction using the X,Y,Z rectangular coordinate system.
Points may be added, moved, and deleted. Line segments may
be added or deleted. Structure is displayed during
construction.
Specify hammer’s model number, serial number, EU in mV/g,
and ICP?. Specify accelerometers’ model number, serial
number, EU, sensitivity, and ICP?. All transducer data is
stored with test results. All structure and transducer data is
stored on a PC-compatible SETUP file.
HAMMER Measurement
Features
Measure Imapct FRFs
Measure FRFs by roving the hammer or the response
transducers. Use a triaxial accelerometer with HP 35670A
option AY6 to easily measure 3-axis motion.
Measurement Setup
Attach transducers, then use the Default Settings routine to
interactively select span, input range, and trigger delay. Force
and exponential windows are set to optimize measurement
quality. Display format shows hammer impact in time domain
to reveal double hits, and FRF and coherence to show
measurement quality.
Trigger delay, force window, and exponential window are set
relative to chosen span. HAMMER-3D automatically stores
exponential window parameters for damping correction during
curve fitting.
Measurement Sequencing
Automatically sequence through the modal test, with
accept/reject prompts after each hit or after the ensemble
average. Pause a test to change the range or other
measurement state, then continue at last point.
SHAKER Measurement
Features
Specify SHAKER-3D Transducers
Specify model number, serial number, EU, sensitivity, and
ICP? for accelerometers and the force transducer. All data is
stored with test results.
Measure Highest Quality FRFs
Measure FRFs between accelerometers and the force
transducer at up to three shaker locations. With option AY6
measure three axes simultaneously with a triaxial
accelerometer or measure one axis three times faster.
Measurement Setup
Attach transducers, then use DEFAULT ROUTINE to
interactively select shaker force level, span and center
frequency, burst percentage and number of averages.
Measurement parameters are stored in a file, and can be
recalled using RECALL SETUP for quick, easy re-starts after
lunch or coffee break.
Measurement Sequencing
Automatically sequence through the modal test, with automatic
file storage and prompting for location of the next
measurement points. Starting point and shaker location are
softkey selectable.
Measurement Storage
FRFs are automatically stored in a unique directory.
Filenames are tagged with the roving measurement point
number and axis (where the accelerometer was located) and
stationary point number and axis (where the shaker was
attached). No file management is required to complete the
analysis.Modal Analysis and Display
SDOF Polynomial Curve Fitter
HAMMER-3D and SHAKER-3D use the same algorithm as
the HP 5423. Complex polynomial, least squares fitter with
residual terms. Fit up to nine modes per test. Compare curve
fit results vs. FRF. Curve fit speed: less than 4 seconds per
FRF (5 modes) with delay off. A 40-point modal test requires
3 minutes to analyze. Damping is corrected for exponential
window value used for hammer tests. Curve fit results are
automatically stored in a PC-compatible text file.
Three-Axis Motion
Whether multiple axes are measured with a triaxial
accelerometer or with one single-axis accelerometer measured
one axis at a time, HAMMER-3D and SHAKER-3D’s residue
sorting algorithm will decompose the resulting residue from
each measured axis and generate a resulting mode shape that
contains true 3-D motion. Residues are scaled to maximum
DOF and stored for animation.
Animate Modes of Vibration
See animated mode shape, frequency, and damping in one
display. Select the following animation parameters:
• Mode number
• Animation speed
• Animation amplitude
• View direction
Plot and Print Mode Shapes
Send graphs of mode shapes directly to Microsoft Word using
Insert Picture, or to an HP-IB plotter. Raster dumps can be
sent to a serial or parallel printer. Plot a single mode or all
modes on one graph. Send an animated modal cartoon to a
serial or parallel printer.
Generate a Test Report
Generate a test report in PC text format containing:
• Test setup information
• Modal frequency, damping, and residues
0Hz 3. AVG : 5 2kHz
A:D1 Freq Resp X:0 Hz Y:660.936 m g/lb
1
kg/lb
LogM ag
4
decades
1
100
m g/lb
LogM ag
4
decades
Disp Frm at
Date:01-27-95 Tim e:09:24:00 PM
Modal Test Report
Test item: Angle Bracket
Date tested: 3/4/97
Test technique: HAMMER-3D
Exponential window used? YES
Exponential time constant: .0625 S
Test File ID: AA
1. Transducer Information
Channel Model# S/N EU ICP? Force Unit
1 PCB 086 3279 24.00 1 lb.
2 PCB 353 8769 10.50 1
2. Measurement Locations and Hammer Strike Directions
Location Orientation
MeasPt# X Y Z DX DY DZ
1 0.0 0.0 0.0 0.0 0.0 1.0
2 1.0 0.0 0.0 0.0 0.0 1.0
3 0.0 1.0 0.0 0.0 0.0 1.0
3. Location of Response Accelerometers
Channel Pt.#
2 12
4. Modal Analysis Setup
Curve Fit Type: SDOF Polynomial
Band Start Band Stop
Mode# Hz Hz # Modes/Band
1 320.0 436.0 1
2 944.0 1080.0 1
5. Modal Analysis Results
Number of modes analyzed: 5
Mode Frequency-Hz Damping-% of critical
1 349.1 .955HP 35670A Analyzer Requirements
HP 35670A Dynamic Signal Analyzer
option 1C2 HP Instrument BASIC
Supported Options
option UFF add 1 Mbyte Non-Volatile RAM
option AY6 add 2 Input Channels
option AN2 add 4 Mbyte RAM or option UFC add 8 Mbyte RAM
option 1CL PC Style 101-Key Keyboard
HAMMER-3D Price and Ordering Instructions
HAMMER-3D Software: $4500 ($US)
Mail or FAX order to Seattle Sound and Vibration, inc. Please include the serial number for the HP
35670A in which the software is to be used. If the analyzer is being purchased concurrently, then write
“New Analyzer” in the serial number field.
SHAKER-3D Ordering Instructions
SHAKER-3D Software: $4500 ($US)
Mail or FAX order to Seattle Sound and Vibration, inc. Please include the serial number for the HP
35670A in which the software is to be used. If the analyzer is being purchased concurrently, then write
“New Analyzer” in the serial number field.
HAMMER-3D and SHAKER-3D for the same HP 35670A:
HAMMER-3D and SHAKER-3D software for the same HP 35670A: $6300 ($US)
Mail or FAX order to Seattle Sound and Vibration, inc. Please include the serial number for the HP
35670A in which the software is to be used. If the analyzer is being purchased concurrently, then write
“New Analyzer” in the serial number field.
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