statik noaniq ramalarni ko‘chishlar usulida hisoblash
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17-18 amaliy mashg‘ulotlar mavzu: statik noaniq ramalarni ko‘chishlar usulida hisoblash misol. 33.1-rasm, a da ko‘rsatilgan rama ko‘chishlar usuli bilan hisoblansin. echish: 1. ramaning kinematik noaniqlik darajasi aniqlash. berilgan ramaning kinematik noaniqlik darajasini (32.1) formulaga asosan aniqlaymiz: berilgan ramaning bikr tugunlari soni bitta bo‘lganligi sababli, burchakli ko‘chishlar soni (1-tugun, 33.1-rasm, a). ramadagi chiziqli ko‘chishlar sonini aniqlash uchun ramaning bikr tugunlari va bikr tayanchlariga sharnirlar kiritib, sharnirli sxemani hosil qilamiz (33.1-rasm, b). bu sharnirli sxemaning erkinlik darajasi ramaning chiziqli ko‘chishlar soniga teng bo‘lib, (32.2) formulaga asosan aniqlanadi: nch=wshar.sns.=3d-2sh-ct= u holda ramaning kinematik noaniqlik darajasi n=1+1=2 ...
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