電大土木工程力學(xué)(本)歷年試題及參考答案資料小抄匯總-預(yù)覽頁
【正文】 同時成立 4．已如圖示結(jié)構(gòu)力矩分配系數(shù)，則桿端彎矩 為 ( )。 A． 1 B． 2 C． 3 D． 4 A．重力在彈性力內(nèi)考慮了 B．重力與其它力相比，可略去不計 C. 以重力作用時的靜平衡位置為 y 坐標(biāo)零點 D. 重力是靜力，不在動平衡方程中考慮 9．圖示等截面梁的截面極限彎矩 M。 EI＝常數(shù)。建立基本結(jié)構(gòu)如圖所示。 ( √ ) (本題 5分 ) 2．圖示結(jié)構(gòu)的超靜定次數(shù)是 n＝ 3。 四、 (本大題 20分 ) 用力矩分配法計算并作圖示 結(jié)構(gòu)的 M圖。 BA AB ／ 1D ? 4／ 7 3／ 7 MP 一 2 +2 — 1／ 2 分配、傳遞 一 3／ 7 — 6／ 7 — 9／ 14 M 一 17／7 8／ 7 — 8／ 7 2? 3分 MF： 4分 分配、傳遞： 4分 M： 4分 彎矩圖： 5分 五、 (本大題 20分 ) 用位移法作圖示結(jié)構(gòu) M圖。 iqlZqlRirP5687212111??? 基本體系圖： 5分 求系數(shù) 11r ： 3分 求自由項 PR1 ： 3分 解方程求 1Z ： 4分 繪彎矩田： 5分 六、 (本大題 20分 ) 圖示剛架橫梁為剛性桿，重量 W： 10kN集中在橫粱上， h＝ 4m， EI＝ 5． 442 104kN 水平側(cè)移剛度： 312hEIk? ＝ 1． 020 104kN／ m(10分 ) 自振頻率： 13 10012 ??? sWhE Ig?＝ (10分 ) 中央廣播電視大學(xué) 2021— 2021 學(xué)年度第一學(xué)期“開放本科”期末考試 土木工程專業(yè) 土木工程力學(xué) (本 ) 試題 2021 年 1 月 一、是非題 (將判斷結(jié)果填入括?。灰浴瘫硎菊_，以表示錯誤 ) (本大題共 3 小題，總計 15 分 ) 1．圖 a 為一對稱結(jié)構(gòu)，用位移法求解時可取半邊結(jié)構(gòu)如圖 b 所示。 m B． 56． 4kN EI=常數(shù)。kgmcm 2,2 ?。 五、 (15 分 ) 試 用機動法繪制圖示多跨靜定梁AM、Q影響線。s recall these colorful images that brought the country great joy. Calabash Brothers Calabash Brothers (Chinese: 葫蘆娃 ) is a Chinese animation TV series produced by Shanghai Animation Film Studio. In the 1980s the series was one of the most popular animations in China. It was released at a point when the Chinese animation industry was in a relatively downed state pared to the rest of the international munity. Still, the series was translated into 7 different languages. The episodes were produced with a vast amount of papercut animations. Black Cat Detective Black Cat Detective (Chinese: 黑貓警長 ) is a Chinese animation television series produced by the Shanghai Animation Film Studio. It is sometimes known as Mr. Black. The series was originally aired from 1984 to 1987. In June 2021, a rebroadcasting of the original series was announced. Critics bemoan the series39。t want to steal food like other mice. Shuke became a pilot and Beita became a tank driver, and the pair met accidentally and became good friends. Then they befriended a boy named Pipilu. With the help of PiPilu, they cofounded an airline named Shuke Beita Airlines to help other animals. Although there are only 13 episodes in this series, the content is very pact and attractive. The animation shows the preciousness of friendship and how people should be brave when facing difficulties. Even adults recalling this animation today can still feel touched by some scenes. Secrets of the Heavenly Book Secrets of the Heavenly Book, (Chinese: 天書奇談 ) also referred to as Legend of the Sealed Book or Tales about the Heavenly Book, was released in 1983. The film was produced with rigorous dubbing and fluid bination of music and vivid animations. The story is based on the classic literature Ping Yao Zhuan, meaning The Suppression of the Demons by Feng Menglong. Yuangong, the deacon, opened the shrine and exposed the holy book to the human world. He carved the book39。s feud with Nezha over his s
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