mexanik va elektromagnit tebranishlar 2

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16 elektrodinamika fizika ii – 2-ma’ruza fizika kafedrasi 2019 mexanik va elektromagnit tebranishlar k.p.abduraxmanov, v.s.xamidov, m.f.raxmatullaeva 1 ma’ruza rejasi so‘nuvchi mexanik tebranishlar. tebranishlarning so‘nish koeffisienti. so‘nishning logarifmik dekrementi va tizimning aslligi. majburiy mexanik tebranishlar. majburiy elektromagnit tebranishlar. rezonans hodisasi. tok va kuchlanishning rezonansi va ularning radiotexnikada qo‘llanilishi. 2 so‘nuvchi tebranishlar tebranish tizimi energiyasining sarf bo‘lishi natijasida, vaqt o‘tishi bilan asta-sekin tebranishning pasayishi jarayoni tebranishning so‘nishi deb ataladi. tebranish so‘nishining sabablari mexanik tizimlarda – ishqalanish hodisasining mavjudligi. elektr tizimlarida – issiqlik va elektromagnit to‘lqinlar nurlanishiga bog‘liq energiyaning yo‘qolishi hamda elektr va magnit gisterizisi hisobiga dielektrik va ferromagnetiklarda issiqlik sarflanishi. 3 tizim erkin so‘nish tebranishining differensial tenglamasi s – tebranuvchi kattalik,  – so‘nish koeffitsiyenti. 0 – erkin so‘nish tebranishining siklik chastotasi ( = 0 bo‘lganda) differensial tenglamaning yechimi: 4 muhitning qarshiligi kichik bo‘lganda  2<< ω02 so‘nuvchi tebranishlar amplitudasi so‘nuvchi tebranishlar chastotasi so‘nuvchi tebranishlar amplitudasini e marta kamayshiga ketgan vaqt oralig‘i …

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kka aytiladi (bitta shartli so‘nuvchi tebranish davrida): w(t) energiya a(t) amplituda kvadratiga proporsionaldir - 7 tebranish tizimining aslligi so‘nishning logarifmik dekrementini kichik qiymatlarida x ning kichik qiymatlarida 8 erkin so‘nuvchi tebranishlar prujinali mayatnik tebranuvchi kontur mexanik tebranish — elastiklik kuchi va ishqalanish kuchi– ta’sirida m massali prujinali mayatnikning kichik tebranishlaridir. ( r – qarshilik koeffisiyenti) elektromagnit tebranishlar —r qarshilik, l induktivlik va c sig’imdan iborat bo‘lgan tebranish konturidagi tebranishlardir. 9 erkin so‘nuvchi tebranishlar prujinali mayatnik tebranish konturi tebranish kattalik x muvozanat holatiga nisbatan siljishlar q zaryad tebranishning differensial tenglamasi so‘nmaydigan tebranishlarning xususiy chastotasi - 0  - so‘nish koeffitsiyenti 10 erkin so‘nuvchi tebranishlar prujinali mayatnik tebranish konturi so‘nuvchi tebranishlar chastotasi q - asllik tebranishlar amplitudasi tebranish qonuni 11 sinusoidal kuch ta’siridagi majburiy tebranishlar garmonik qonuniyat o‘zgarishidagi faktorlar ta’siri ostida sodir bo‘ladigan tebranishlar majburiy tebranishlar deb ataladi. majburiy garmonik tebranishlarning differisial tenglamalari  – so‘nish koeffitsiyenti 0 – tebranishning xususiy chastotasi …

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tebranishning fazasi majburiy tebranshning amplitudasi 15 mexanik majburiy tebranishlarning differensial tenglamasi - majbur etuvchi kuch r – qarshilik koeffitsiyenti k – qattiqlik koeffitsiyenti 0 – tebranishning xususiy chastotasi  – majbur etuvchi faktorning chastotasi 16 elektr majburiy tebranishlarning differensial tenglamasi - majbur etuvchi faktor – tashqi eyuk yoki o‘zgaruvchan kuchlanish — zaryad va qo‘yilgan kuchlanish orasidagi faza siljishi q- elektr zaryadi, r – qarshilik, l- induktivlik, s - elektr sig’imi maksimal zaryad tebranish fazasi - differensial tenglama - tenglamaning yechimi 17 tok kuchining o‘zgarishi zaryaddan vaqt bo‘yicha birinchi xosilani olamiz tok kuchining amplitudasi yoki maksimal tok - tok va qo‘yilgan kuchlanish orasidagi faza siljishi umumiy holda 18 rezonans majbur etuvchi kuch chastotasi tebranish tiziminig xususiy chastotasiga yaqinlashganda majburiy tebranishlar amplitudasining birdangina ortishi hodisasi –rezonans hodisasi deb ataladi. rezonans chastotasi rezonans amplitudasi 19 rezonans majburiy tebranishlarning amplitudasi ifodasini ko‘rib chiqamiz 1. majbur etuvchi kuch chastotasi nolga teng bo‘lsin tebranish sodir bo‘lmaydi, …

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lim saytlari va internet resurlari fizika.uz – talabalar va fizika o‘qituvchilari uchun sayt neutrino.ucoz.ru- tatu fizika kafedrasi dotsenti o.e.tigayning shaxsiy sayti. fizik.ru - tatu fizika kafedrasi katta o‘qituvchisi v.s.xamidovning shaxsiy sayti. estudy.uz- tatu talabalari uchun fizikadan masofaviy ta’lim tizimi yenka.com http://phet.colorado.edu/ http://www.falstad.com/mathphysics.html http://www.quantumatomica.co.uk/download.htm http://school-collection.edu.ru 22 image1.png image2.jpeg image3.wmf image4.wmf image5.wmf oleobject1.bin oleobject2.bin oleobject3.bin image6.wmf image7.wmf image8.wmf image9.wmf image10.wmf image11.wmf oleobject7.bin oleobject8.bin oleobject9.bin oleobject10.bin oleobject4.bin oleobject5.bin oleobject6.bin image12.wmf image13.wmf image14.wmf oleobject11.bin oleobject12.bin oleobject13.bin image15.wmf image16.wmf oleobject14.bin oleobject15.bin image18.png image17.wmf image18.wmf image19.wmf image20.wmf image21.wmf image22.wmf oleobject19.bin oleobject20.bin oleobject21.bin oleobject16.bin oleobject17.bin oleobject18.bin image23.wmf image24.wmf image25.png image26.png oleobject22.bin oleobject23.bin image27.wmf image28.wmf image29.wmf image30.wmf image31.wmf image32.wmf image33.wmf image34.wmf oleobject29.bin oleobject30.bin oleobject31.bin oleobject32.bin oleobject33.bin oleobject26.bin oleobject27.bin oleobject28.bin image43.wmf image35.wmf image36.wmf image37.wmf image38.wmf image39.wmf image40.wmf image41.wmf image42.wmf oleobject37.bin oleobject38.bin oleobject39.bin oleobject40.bin oleobject41.bin oleobject42.bin oleobject43.bin oleobject34.bin oleobject35.bin oleobject36.bin image44.wmf image45.wmf oleobject44.bin oleobject45.bin image46.wmf image47.wmf oleobject46.bin oleobject47.bin image48.wmf image49.wmf image50.wmf oleobject48.bin oleobject49.bin oleobject50.bin image51.wmf image52.wmf image53.wmf image54.wmf oleobject54.bin oleobject51.bin …

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image59.wmf oleobject58.bin oleobject59.bin oleobject55.bin oleobject56.bin oleobject57.bin image60.wmf image61.wmf image62.wmf image63.wmf image64.wmf image65.wmf oleobject63.bin oleobject64.bin oleobject65.bin oleobject66.bin oleobject60.bin oleobject61.bin oleobject62.bin image66.wmf image67.wmf oleobject67.bin oleobject68.bin image68.png image69.wmf image70.wmf image71.wmf image72.wmf 2 2 0 2 20 dsds s dtdt dw ++= 0 cos() t saet d wj - =+ 0 t aae d - = 22 0 wwd =- 0 cos() t xaet d wj - =+ t 0 a 1 t d = 0 () 0 ()1 () t t t tt ae at e attaee d d dd - -+- === + ( ) 0 0 (), () t t t atae attae d d - -+ = += ()1 ln () att t attn qd t ==== + () 2 ()() wt q wtwtt p = -+ 22 2 ma wku w =+= 22 2 0 222222() 00 2 22()22 () 22 ()() 22 2 11 t tt t t …

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16 elektrodinamika fizika ii – 2-ma’ruza fizika kafedrasi 2019 mexanik va elektromagnit tebranishlar k.p.abduraxmanov, v.s.xamidov, m.f.raxmatullaeva 1 ma’ruza rejasi so‘nuvchi mexanik tebranishlar. tebranishlarning so‘nish koeffisienti. so‘nishning logarifmik dekrementi va tizimning aslligi. majburiy mexanik tebranishlar. majburiy elektromagnit tebranishlar. rezonans hodisasi. tok va kuchlanishning rezonansi va ularning radiotexnikada qo‘llanilishi. 2 so‘nuvchi tebranishlar tebranish tizimi energiyasining sarf bo‘lishi natijasida, vaqt o‘tishi bilan asta-sekin tebranishning pasayishi jarayoni tebranishning so‘nishi deb ataladi. tebranish so‘nishining sabablari mexanik tizimlarda – ishqalanish hodisasining mavjudligi. elektr tizimlarida – issiqlik va elektromagnit to‘lqinlar nurlanishiga b...

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