SOURCES SOUGHT
66 -- Request for Information - Optimal Strong Motion Shake Table (Class A) and Strong Motion Shake Table (Class B)
- Notice Date
- 5/24/2006
- Notice Type
- Sources Sought
- Contracting Office
- U S GEOLOGICAL SURVEY, APS PO BOX 25046 MS204A DENVER FEDERAL CENTER DENVER CO 80225
- ZIP Code
- 80225
- Solicitation Number
- 06CR31-NoSolicitation
- Response Due
- 7/26/2006
- Archive Date
- 5/24/2007
- Small Business Set-Aside
- N/A
- Description
- REQUEST FOR INFORMATION Acquisition of Optimal Strong Motion Shake Table (Class A) and Strong Motion Shake Table (Class B). I. This is a Request for Information (RFI) only. It is issued solely for information and planning purposes. Although information gathered under this Request for Information (RFI) may be used to secure funding and initiate a contract, the government does not intend to enter into a contract on the basis of this RFI or to otherwise pay for the information. The government will not pay for any information or administrative costs incurred in response to this RFI. II. RESPONSES: A. Respondents should submit the RFI information specified below in Paragraphs IV and/or V, Proposed Minimum Specifications. Respondents may also present several al-ternative solutions provided they meet or exceed the minimum specifications. Responses shall be limited to 30 pages exclusive of commercial printed brochures. B. Estimates for shake tables shall be kept separate. The USGS is also soliciting infor-mation to determine the availability of capable contractors that can provide this equip-ment. III. BACKGROUND The U. S. Geological Survey (USGS) has a requirement for an optimal strong motion shake table (Class A) and a strong motion shake table (Class B) suitable for testing accel-erometers to be used in the Advanced National Seismic System and for other purposes. The USGS intends to install the shake tables at its Albuquerque Seismological Labora-tory located adjacent to Kirtland AFB in Albuquerque, NM. Below are specifications for both Class A and B shake tables. IV. PROPOSED MINIMUM SPECIFICATION FOR OPTIMAL STRONG MOTION SHAKE TABLE (CLASS A) The USGS has a requirement for a vertical (or user selectable vertical and horizontal) shake table. The shake table shall meet the following minimum specifications. 1. Payload Platform Size: Sufficient to accommodate a Unit Under Test (UUT) meas-uring 21 cm wide by 21 cm long by 19 cm high, exclusive of any shielding or other obstruction. 2. Vibration Isolation: Not necessary. Customer will depend on the very low back-ground noise levels at the USGS Albuquerque Seismological Laboratory. 3. Bandwidth with good linearity and fidelity: 0.1 to 35 Hz 4. Distortion of Waveforms: Below -40 dB 5. Payload: At least 4 kg, exclusive of the platform mass and any shielding required to meet the Magnetic Field requirement. 6. Magnetic Field: The magnetic field strength variation at the UUT shall not exceed 0.01 gauss due to any electrical/magnetic drive mechanism or electronics associated with the shake table. This may be accomplished by providing shielding, which is not included in the payload. 7. Maximum acceleration capability: 5 g (9 g peak-to-peak) at all frequencies while carrying the maximum rated payload, except as limited by maximum displace-ments (i.e., stroke). 8. Input Drive: Voltage, with a maximum voltage in the range of either 10 V or +20 V, fully differential. The table shall be excitable by sine waves, user-programmable arbitrary waveforms, and band-limited square waves, supplied by the user. The table acceleration and displacement (depending on user option selected) shall be propor-tional to the input drive voltage waveform supplied by the user. Digital-controller equivalents are acceptable as well. 9. Maximum Displacement (stroke, peak to peak): At least 381 mm (15.00 in.). 10. Tilt Error of load platform through full range of motion: Less than 1.1 milliradi-ans, preferably less than 0.11 milliradians. 11. Roughness of path: <0.1% of stroke (less than -60 db). 12. Displacement Reference: The table shall include a reference linear displacement sensor (laser interferometric or eddy current) accurate over entire stroke of table to 0.05 mm (rms noise plus linearity error). V. PROPOSED MINIMUM SPECIFICATION FOR STRONG MOTION SHAKE TA-BLE (CLASS B) The U. S. Geological Survey (USGS) has a requirement for a vertical shake table suitable for testing accelerometers. The shake table shall meet the following minimum specifica-tions. 1. Payload Platform: Sufficient to accommodate a UUT (Unit Under Test) meas-uring 21 cm wide by 21 cm long by 19 cm high, exclusive of any shielding or other obstruction. 2. Vibration Isolation: Not necessary. Customer will depend on the very low background noise levels at the USGS Albuquerque Seismological Laboratory. 3. Bandwidth with good linearity and fidelity: 0.2 to 20 Hz. 4. Distortion of Waveforms: Less than or equal to -40 dB (1%). 5. Payload: 4 kg, exclusive of the platform mass and any shielding required to meet the Magnetic Field requirement. 6. Magnetic Field: The magnetic field strength variation at the UUT shall not ex-ceed 0.01 gauss due to any electrical/magnetic drive mechanism or electronics as-sociated with the shake table. This may be accomplished by providing shielding, which is not included in the payload. 7. Maximum acceleration capability: 4 g (8 g peak-to-peak) at all frequencies with a 4kg payload, except as limited by maximum displacements (i.e., stroke). 8. Input Drive: Voltage, with a maximum voltage in the range of either 10 V or +20 V, fully differential. The table shall be excitable by sine waves, user-programmable arbitrary waveforms, and band-limited square waves, supplied by the user. The table acceleration and displacement (depending on user option se-lected) shall be proportional to the input drive voltage waveform supplied by the user. Digital-controller equivalents are acceptable as well. 9. Maximum Displacement (stroke, peak to peak): mm (6.25 in). 10. Tilt error of load platform through full range of motion: Less than 1.1 millira-dians. 11. Roughness of path: Less than 0.1% of stroke (less than -60 db). 12. Displacement Reference: The table shall include a reference linear displacement sensor accurate over the entire stroke of the table accurate to less than 0.2 mm rms (rms noise plus linearity error).
- Web Link
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(http://ideasec.nbc.gov/j2ee/announcementdetail.jsp?serverId=GS1434HQ&objId=845814)
- Record
- SN01056580-W 20060526/060524221238 (fbodaily.com)
- Source
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