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Recent content by pwtem

  1. pwtem

    info/education on vibration dampening

    micjk Seems everyone's helped with the the "dampening" issue, but you also asked about a career change. Unless you can transfer units from previous coursework, you're pretty much stuck with 4 yrs to get a normal BSME, or even more doing it night-school fashion. One option for you to...
  2. pwtem

    Find velocity from accelerometer without initial velocity?

    anands78 "I still dont get you. When we have not at all gathered a DC component(i.e, the time domain data is oscillating about a zero value; say the readings are from an accelerometer) then why would we have to remove it?" Yes, if neither your sensor nor amplifiers (if any) or...
  3. pwtem

    Are Bay Muds (OL/OH) Class F Soils by UBC?

    Hi. Just found this site/forum so this response is v. late, but might be useful to others. Measure the shear wave velocities using a P- S-wave velocity borehole tool, like the OYO P-S Suspension Logger. Those muds can be REALLY SLOW, like less than 30m/s (Vs).
  4. pwtem

    Locating Deep (50'+) Cast Iron Pipe?

    Have you considered geophysics? We located an 8ft pipe 45ft below the surface using high-resolution shear-wave reflection. The data looked like radar, and easily had enough resolution for a 3ft pipe. Technique requires a shear-wave micro-vibrator. Like all geophysics, the quality will depend on...
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