--- Christian Mayer <[EMAIL PROTECTED]>写道: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Andy Ross schrieb: > > Dai Qiang wrote: > > > >>I'm wondering, if it's possible to calculate and > record the pressure > >>distribution on all parts of a plane, e.g. gears, > wings etc, when > >>it's landing? > > > > > > Landing gear could be done fairly easily, as the > force along the gear > > strut is known to the FDM. > > > > But stress on other aircraft parts are basically > impossible with a FDM > > at our level of precision: you would need a full > finite-element model > > of every load-bearing structure on the aircraft. > That's definitely > > not a task for a real-time simulation. > > Dai Qiang, for what do you need that data?
Hi Christian, I think the data would be a reference to forecast the metal fatigue situation of a plane, after it lands for several times. Just like what Vassilii said in the last post, structural integrity and the residual weakness would be brought into the whole physics model. > > I can only think of animating the model. This works > already for the gear > model. And an reasonable animation of the wings > could be easily faked. > All you need is the amount of lift they produce. > Divide that with a > constant weight-force of the plane (e.g. MTOW * > earth acceleration) and > you get a number that is zero when the wings produce > no lift and 1 > during a steady flight (and somewhere above 7 when > the wings break...) > > CU, > Christian > > . > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.0 (MingW32) > > iD8DBQFDjID1lhWtxOxWNFcRAp66AJ9Tnw97UCGc1Tr5gxwjtg6FLGwD3wCdEW3j > TDdl2oi9/9eQGQI9Wm+Z2Ag= > =Jtsq > -----END PGP SIGNATURE----- > > _______________________________________________ > Flightgear-devel mailing list > [email protected] > http://mail.flightgear.org/mailman/listinfo/flightgear-devel > 2f585eeea02e2c79d7b1d8c4963bae2d > __________________________________________________ 赶快注册雅虎超大容量免费邮箱? http://cn.mail.yahoo.com _______________________________________________ Flightgear-devel mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
