| 单词 | virtual displacement |
| 释义 | > as lemmasvirtual displacement virtual displacement n. Mechanics a notional infinitesimal displacement in a mechanical system which is compatible with the constraints of the system; cf. sense A. 6. ΚΠ 1849 Trans. Royal Irish Acad. 22 i. 116 The equation of virtual velocities, as stated by M. Poisson and other writers, supposes no virtual displacements but those for which equal and opposite displacements are possible. 1930 Amer. Math. Monthly 37 523 The virtual work of the weight w of the bead is δW = − 3 wq2δq, and this vanishes at q = 0 for every virtual displacement. 2006 B. K. Donaldson Introd. Struct. Dynamics i. 33 If a rigid body is in static equilibrium, any virtual displacement leads to zero virtual work. < as lemmas |
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