Seismic & Load

Transcription

The four result tables, in English and unrounded.

Source: test report, pages 13–16. The vertical direction was not assessed; the report prints a slash in those cells.

Fixture

Half of a seismic result is how the sample was held.

1. 01Sample built to the production drawing, with 300 kg of ballast in five trays.
2. 02Four accelerometers fitted; natural frequency and damping measured by white-noise sweep, 1–35 Hz.
3. 03Synthetic earthquake wave applied in X and Y at the intensity 8 level, then at the intensity 9 level.
4. 04Sweep repeated after each level and compared against the pre-test values.

The report · front sheets and pages 1–4

The report, sheet by sheet: what was tested, and how it was held.

Twenty-one scanned sheets in all: the cover, the front notes, the contents, then the eighteen numbered pages of the report itself.

A · Front matter

• cover

  Report cover. Product: IT cabinet, model TR-61220. Applicant and manufacturer: Hebei Zereite Electronic Technology. Issued by China Telecommunication Technology Labs under CAICT; CMA and CNAS marks.

• notes

  Front notes. Nine conditions, among them: valid only with the inspection seal; invalid without the three signatures or if altered; objections within 15 days; no partial copying without written approval; sample information supplied by the client.

• contents

  Contents. Conclusion p.1; §1 equipment configuration p.2; §2 structure and installation p.4; §3 structural performance test p.5, with the layout, the curves and the results at p.13; §4 instruments p.17; §5 environment and §6 personnel p.18.

B · Conclusion

• p.1

  Conclusion page. Sample: 1 unit, produced April 2021, submitted by the client. Tested 19 May 2021, issued 1 June 2021, against YD 5083-2005 at intensity 8 and intensity 9. With a 300 kg ballast the equipment met the requirements: PASS.

C · §1 Equipment configuration

• p.2

  §1 Configuration of the tested equipment, figure 1-1. Doors open: five ballast trays, 60 kg each, 300 kg in total, matching the ballast mass on the conclusion page.

• p.3

  Figure 1-2. The configured sample, doors open and doors closed: a standard 19-inch cabinet with mesh front and rear doors.

D · §2 Structure and installation

• p.4

  §2 Structure and installation, figure 2. Outline 600 × 1200 × 2000 mm; cabinet 160 kg; ballast 300 kg. The frame is fully welded; roof and base are screwed to it and spot-welded. The base is fixed by four M12 bolts to channel steel, and the channel steel is bolted to the shake table. The top has no external connection.

  Material thickness: frame, roof, side panels, rear and front door 1.2 mm; base 1.3 mm; cross-members and trays 1.5 mm; mounting angle rails 2.0 mm.

The report · pages 5–12

The measurement pages: the accelerometer layout and the curve sheets.

E · §3.1 Accelerometer layout

• p.5

  §3.1 Accelerometer layout, figure 3. Four accelerometers: no. 1 on the shake table, no. 2 on the cabinet base, no. 3 at mid-height, no. 4 on the cabinet top.

F · §3.2 Dynamic characteristic and response-spectrum curves

• p.6

  Figures 4 and 5: intensity 8, horizontal X, pre-test and post-test dynamic characteristic curves.

• p.7

  Figures 6 and 7: intensity 8, horizontal Y, pre-test and post-test curves.

• p.8

  Figure 8: intensity 8, vertical Z, pre-test curve at 29.178 Hz. Figure 9: intensity 8, horizontal X, test response spectrum plotted against the required response spectrum.

• p.9

  Figure 10: intensity 8, horizontal Y, response spectrum. Figure 11: intensity 9, horizontal X, pre-test curve.

• p.10

  Figures 12 and 13: intensity 9, horizontal X post-test recheck and horizontal Y pre-test.

• p.11

  Figure 14: intensity 9, horizontal Y, post-test recheck. Figure 15: intensity 9, horizontal X, response spectrum.

• p.12

  Figure 16: intensity 9, horizontal Y, response spectrum. Thirteen figures over seven sheets.

The report · pages 13–16

The result pages: the four tables, transcribed above.

G · §3.3 Seismic performance results

• p.13

  Table 3.1, dynamic characteristics at intensity 8. Transcribed in full above, as table A.

• p.14

  Table 3.2, seismic assessment at intensity 8. X: 0.660 g input, 0.889 g response. Y: 0.660 g, 2.159 g. No structural damage; PASS in both directions. Basis: YD 5083-2005, chapters 6 and 7, clause 7.0.1.

• p.15

  Table 3.3, dynamic characteristics at intensity 9. Transcribed in full above, as table B.

• p.16

  Table 3.4, seismic assessment at intensity 9. X: 1.320 g input, 1.705 g response. Y: 1.320 g, 4.517 g, double the intensity 8 input. No structural damage; PASS in both directions.

The report · pages 17–18

The closing pages: the instruments, the environment and the personnel.

H · §4 Instruments

• p.17

  §4 Instruments: a 2.5 m × 2.5 m shake table, a data acquisition and analysis unit, and four capacitive triaxial accelerometers, each listed with its serial number and calibration expiry. All were in calibration on the test date.

I · §5 Environment and §6 Personnel

• p.18

  §5 Test environment: 23–25 °C, 40–41 % relative humidity. §6 Personnel: one tester and one reviewer. The page is marked as the last page.

Scope

What this report covers — and what it does not.