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My Comments on "Inhabiting The Moon & Other Planets".
Recently, I was emailed by someone, who asked me whether or not, it is possible to build a submarine; which can also be used as an aircraft? My reply was, “Yes, if you use carbon nanotubes for the construction of the pressure hull & the associated structures”. Carbon nanotubes have about 600: 1 of the strength to weight ratio of high-tensile steel. For example, if you design a spherical pressure hull of (say) 50 miles diameter, to house humans, in a 1 atmosphere internal steel pressure vessel, on the Moon, then its wall thickness will be about 100 ft (See my book on, "Pressure Vessels-Table 1.5 & Section 11.11.8"! If, however, you design the same specification spherical shell, of 50 miles diameter, using carbon nanotubes for the structure, its wall thickness will only be about 1 ft! Moreover, its mass will be about 1/600th that of the comparable high-tensile steel vessel. If the spherical pressure vessel, made from carbon nanotubes is of (say) 20 miles diameter, its wall thickness need only be about 5 ins!!! Thus humankind can inhabit the Moon & other planets! We will have lift-off; albeit; when it happens, I will be "off the planet"!
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Nonlinear buckling of submarine pressure hulls under external hydrostatic pressure;
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Dear SNAME Students,
Hello, I’m Mark Groden, your new Student Steering Committee (SSC) Chair. I am very excited to take over this position and serve you all this year! Some things the SSC and I will be working toward and look forward to include:
- Implementation of a student-shadowing program
- A student Technical and Research Steering Committee representative
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Buckling & Vibration of a Composite Submarine Pressure Hull; Using ANSYS.
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We kicked-off 2012 with the first meeting of the Executive Committee (EXCOM) on 30 January. This is an important activity in the governance of our Society and an opportunity for me to focus the efforts of our Society’s leadership for the next two months. I was pleased to announce several new chairs for our standing committees, assignments for newly created committees and reliefs for those volunteers who had served the Society diligently for many years. Please see the press release posted on the website entitled “Congratulations to the Newest Appointed Committee Chairs and RVPs for 2012” and join me in expressing my gratitude for those who have and those who will give so generously of their time and talents. As the new and existing committee chairs form up their committee membership and press forward with their activities, I want to urge you all to get involved with the Society in a manner that suites your particular interests. Membership in a professional society is most rewarding when you are personally engaged; active involvement in a group of like minded associates is an essential part of being a professional. A professional looks beyond their self interest and seeks to improve the condition of others in the profession. SNAME has a proud history and rich tradition of being the premier Society for maritime professionals, and while I appreciate this concept may be a little abstract, I urge you to think of your participation in SNAME as a “contact sport” not a “spectator sport.” If you do get involved, I guarantee that the personal rewards will far exceed your expectations and that your involvement will pay dividends that you as an active professional could not have anticipated.
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Huisman, the specialist in lifting, drilling and subsea solutions, successfully delivered the 600mt Wind Turbine Installation Crane onboard GeoSea’s DP2 jack-up vessel
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