5 Khi tính beàn thanh chòu uoán ngang phaúng ta phaûi tính beàn cho ñieåm ôû

5 khi tính beàn thanh chòu uoán ngang phaúng ta

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………………………………………………………………………………………………………………………………………………………………………………………. …………………………………………………………………………………………………….………………….………………….………………….……………………. …………………………………………………………………………………………………….………………….………………….………………….……………………. 5. Khi tính beàn thanh chòu uoán ngang phaúng, ta phaûi tính beàn cho ñieåm ôû lôùp bieân vaø lôùp trung hoøa vì: ............................................................................................................................. ................................................................................................................................................... ................................................................................................................................................... 6. Haõy giaûi thích caùc thoâng soá trong coâng thöùc tính öùng suaát tieáp cöïc ñaïi max y x zy x Q S J d τ = treân thaân caùc maët caét hình chöõ I vaø ñaët ñöùng: ............................................................................. ................................................................................................................................................... 7. Ngöôøi ta söû duïng boä truyeàn ñai thang phoå bieán hôn boä truyeàn ñai deït laø do: ................................ ................................................................................................................................................... ............................................................................................................................................................... ............................................................................................................................................................. 8. Khi laøm vieäc vaän toác truyeàn cuûa boä truyeàn xích coù ñaëc ñieåm: ...................................... ............................................................................................................................................................. ................................................................................................................................................ ........... .............................................................................................................................................................. 9. Ta phaûi choïn chieàu daøy daây ñai phuø hôïp vôùi ñöôøng kính baùnh ñai vì: ............................................
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.............................................................................................................................................................. .............................................................................................................................................................. .............................................................................................................................................................. 10. Thoâng soá aûnh höôûng ñeán vaän toác truyeàn cuûa boä truyeàn xích laø: ...................................... ............................................................................................................................................................ ....................................................................................................................................... ................................................................................................................................................... 11. Boä truyeàn baùnh raêng nghieâng ñöôïc duøng trong nhöõng tröôøng hôïp: ......................................
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