20xx年最新電大工程力學(xué)本期末復(fù)習(xí)考試小抄-資料下載頁
2024-10-14 12:07本頁面
【導(dǎo)讀】9．簡支梁某截面K彎矩影響縱坐標yK的物理意義是。11．靜定結(jié)構(gòu)內(nèi)力與反力影響線的形狀特征是。15．在圖示結(jié)構(gòu)中，為使體系自振頻率?16．圖示a、b兩體系的EI相同，其自振頻率a?A．不確定B．ba???17．圖示結(jié)構(gòu)中，除橫梁外，各桿件EI=常數(shù)。質(zhì)量集中在橫梁上，不考慮桿件的軸向變形，則體系振動的自由度數(shù)為。20．反映結(jié)構(gòu)動力特性的重要物理參數(shù)是。24．用力矩分配法計算結(jié)構(gòu)得到一個收斂的結(jié)果，是因為。25．用力矩分配法計算時，結(jié)點的不平衡力矩等于。26．圖示結(jié)構(gòu)桿件BC的B端轉(zhuǎn)動剛度BCS為。33．用位移法計算圖示各結(jié)構(gòu)，基本未知量是兩個的結(jié)構(gòu)為。36．力法典型方程是根據(jù)以下哪個條件得到的。37．力法典型方程中的系數(shù)ij?jX作用下產(chǎn)生的jX方向的位移。41．圖示對稱結(jié)構(gòu)桿件EI為常量，利用對稱性簡化后的一半結(jié)構(gòu)為。，按此力狀態(tài)及位移計算公式可求出AB兩點的相對線位移。
【正文】 for more than 10 years. My life was like a running race moving from place to place. I also lived in Beijing and Shanghai before, she said. But Chengdu is a place that you never want to leave once settling down. It is now my second hometown, she said. If the environment is further improved, the city will attract more people to visit and live, with the 72hour visafree policy and pelling conditions in transportation, culture, climate and cuisine, he said. Foreigners also gave positive feedback on the policy. A spokesman from Dell Inc said the pany has a global hub of operation in Chengdu, so the three day visa has an immediate and positive influence on the pany39。s business development. Rudy Buttignol, president of the public broadcasting pany in British Columbia, Canada, said his work requires frequent travel to Chengdu and the policy makes the trips easier. Data from the city39。s public security bureau shows some 100 foreign visitors enjoyed the 72hour policy by the end of March, most of them from the United States, the United Kingdom and Germany. Chengdu also reported robust growth in its overall tourist industry last year. Official statistics show that it received some 150 million tourists last year, an increase of 28 percent from 2020. Around million came from abroad, an increase of 12 percent. Total revenue from tourism surpassed 133 billion yuan ($). During his visit to Kazakhstan in September, Chinese President Xi Jinping proposed that China and Central Asia join hands to build a Silk Road economic belt to boost cooperation. The idea has been widely echoed in Central Asian countries, being an encouraging blueprint for Chinese areas along the Silk Road that has linked Asia and Europe for more than 2,000 years. In the next three weeks, China Daily reporters will travel through the belt in China and in Kazakhstan, Uzbekistan and Turkey. They will show the progress and expectations of the countries, businesse s and peoples on the route. Shaanxi the start of the ancient Silk Road has positioned itself as the new starting point for the development of the Silk Road Economic Belt, which will strengthen China39。s cooperation with Central Asian countries, a senior official said. Shaanxi Governor Lou Qinjian said the province is fresh, rich and unique, as it was when it anchored one end of the ancient S ilk Road. It is the best option for acmodating industrial transfers from East China or the world at large, he said on Wednesday in Xi39。an. Lou held a joint interview with 27 media, including China Daily, the first in a series of interviews entitled Chinese Media A long the Silk Road. The interviews will be in Shaanxi and Gansu provinces and the Xinjiang Uygur autonomous region, as well as Kazakhstan, Uzbekistan and Turkey. The media group held the first interview on Wednesday morning in Xi39。an, the starting point of the ancient Silk Road, a trade channel established more than 2,000 years ago linking China, Central Asia and Europe.
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