【正文】 nd move to a new site on nearby Changxing Island.“The new factory will be much bigger than the present plant,” Li said. “Phase 1 will be ready for us when we move at the end of 2006.”In addition to moving the Shanghai factory to a new site, SPMP expects future business operation with ZPMC.Officials at China Harbour Engineering (Group) Corporation are understood to have told SPMP of plants for SPMP and ZPMC to cooperate more in bidding for projects in future. Both panies are expected to retain their individual manufacturing capability, however, with precise details of future cooperation still some way from being finalised.Meanwhile, SPMP associate pany ZPMC is strengthening its position as the world’s largest manufacturer of shiptoshore container cranes, supplying slightly more than half the annual international container crane market. In addition to operating four crane production plexes for its crane manufacturing and other businesses.ZPMC’s full range of products includes quayside container cranes, rubbertyred gantry cranes, bulk material ship loaders and unloaders, bucketwheel stackers and reclaimers, portal cranes, floating cranes, and engineering vessels. The pany has also diversified into manufacturing other large steel structures including large steel bridges.ZPMC EXPANDING PRODUCTIONZPMC’s cranes and other products are in use at over 150 shipping terminals in 37 countries and regions worldwide. By the end of December 2005, ZPMC had supplied 705 quayside container cranes, and had orders in hand to deliver another 128 quayside container cranes in 2006. In addition, at the end of 2005 ZPMC had delivered 1,148 rubbertyred gantry cranes to customers worldwide and had orders in hand to deliver 308 rubbertyred gantry cranes to customers in 2006.ZPMC is expanding production facilities in expectation that the volume of orders will grow in future. The pany owns four crane production plexes in Shanghai and the surrounding area at Jiangyin, Changzhou, Zhangjiang and Changxing Island.The Changxing production site, which was pleted in 2001, covers one million sq m, and has a coastline. The facility is capable of manufacturing 160 quayside shiptoshore container cranes each year along with 300 rubbertyred gantry cranes and 200,000 metric tons of large steel bridge structures.Plans call for a futher 3 million sq m of land to be reclaimed at Changxing, which ZPMC will develop to bee its largest production centre.Korea looks inward In a fragmented global port crane industry, Korean manufacturers are being forced to look for more business in their domestic markets South Korea’s container crane and port crane equipment manufacturing industry has bee more focused on the domestic market in recent years as manufacturers have faced tough price petition from ZPMC of China in major foreign markets. The problem is the same as that faced by other port crane manufacturers around the world, none of which account for more than about an 8% share of the world container crane market. As well as ZPMC, petition from European and Japanese equipment suppliers is also strong, both for quayside container cranes and for rubbertyred gantry crane contracts. While South Korean firmsincluding Hyundai Heavy Industries, Samsung Heavy Industries, Doosan Heavy Industries, and Hanjin Heavy Industries – continue to bid for international contracts, winning large orders has bee increasingly rare. Doosan Heavy Industries amp。另一個(gè)收獲就是要學(xué)會(huì)根據(jù)結(jié)構(gòu)受力的特點(diǎn)應(yīng)用材料，將材料用到該用的地方。設(shè)計(jì)銷軸直徑為對(duì)銷軸 合格對(duì)支撐板的擠壓應(yīng)力，設(shè)支撐板厚20mm。167。由軌道型號(hào)QU120查得軌道理論重量，主小車軌道重量 欄桿等重量 主梁的均布載荷 2．主小車布置，兩側(cè)起升機(jī)構(gòu)對(duì)稱布置，重心位于對(duì)稱中心。167。軌道側(cè)主腹板受局部壓應(yīng)力，應(yīng)將板加厚，由局部壓應(yīng)力的分布長(zhǎng)度，設(shè)計(jì)離上翼緣板350mm的一段腹板板厚取為18mm。1. 主主梁尺寸初選高度=1294~1571mm考慮大車運(yùn)行機(jī)構(gòu)安裝在主梁內(nèi)，且主主梁與副主梁的高度差必須滿足一定得要求，故將主主梁取為大截面薄鋼板的形式，以達(dá)到節(jié)省材料、重量輕的要求。整個(gè)設(shè)計(jì)安全、可靠、節(jié)材、耐用，滿足了設(shè)計(jì)要求。偏軌箱型梁橋架不僅可減小小車的外形尺寸，同時(shí)也增大了起升空間，有利于鑄造廠間的應(yīng)用。 副主梁一側(cè)端梁的校核 51 致謝 57 參考文獻(xiàn) 58 附錄A 59 附錄B 65 摘要六梁鑄造起重機(jī)是橋式起重機(jī)的重要組成部分，是中大型起重設(shè)備，由四根主梁和兩根端梁組成。 主梁的穩(wěn)定性 30 167。 載荷組合的確定 10 167。研究方法在滿足結(jié)構(gòu)的強(qiáng)度，剛度，穩(wěn)定性以及疲勞強(qiáng)度的情況下，減小結(jié)構(gòu)的尺寸，做到經(jīng)濟(jì)性安全性最優(yōu)組合。 1 167。 水平載荷 22 第三章 主主梁計(jì)算 27 167。 剛度計(jì)算 44 167。因此在選材時(shí)選用穩(wěn)定性好，對(duì)應(yīng)力集中情況不敏感的Q235A，降低材料的成本。而其它受力較小的地方則采用較薄的板，以節(jié)約材料。 材料選擇及許用應(yīng)力根據(jù)總體結(jié)構(gòu)，鑄造起重機(jī)工作級(jí)別A8為重級(jí)，工作環(huán)境溫度較高，設(shè)計(jì)計(jì)算時(shí)疲勞強(qiáng)度為其首要約束條件，選用Q235A，考慮起重量較大，主/副梁均采用偏軌箱型梁。有軌道一側(cè)上翼緣板外伸長(zhǎng)度mm，取250mm。其尺寸如下圖圖(4)2. 副主梁跨端截面尺寸的確定 確定其高度 ，取腹板高度為800 副主梁跨端截面尺寸如圖(5)圖(5)3. 截面性質(zhì)( 1) 跨中 建立圖示的直角坐標(biāo)系，求形心位置凈截面面積 毛截面面積 計(jì)算彎心位置A 彎心距主腹板板厚中線的距離為 計(jì)算慣性矩 對(duì)形心軸的慣性矩：對(duì)形心軸的慣性矩： 副主梁跨端截面性質(zhì) 建立圖示的坐標(biāo)系，求截面形心位置凈截面面積 毛截面面積 對(duì)形心軸的慣性矩：對(duì)形心軸的慣性矩：三、端梁截面尺寸考慮大車車輪的安裝及臺(tái)車的形狀尺寸，端梁內(nèi)寬取為600。5． 計(jì)算副主梁水平載荷時(shí)，將鉸接點(diǎn)看成剛性連接。 橋架拱度橋架跨度中央的標(biāo)準(zhǔn)拱度值考慮制造因素，實(shí)取跨度中央兩邊按拋物曲線 設(shè)置拱度，如下圖(34)距跨中為 的點(diǎn)，距跨中為 的點(diǎn)，距跨中為 的點(diǎn)，第五章 端梁校核167。滿載小車在副主梁跨端時(shí)，端梁截面22的最大彎矩和剪切力為空載小車位于跨中時(shí)，端梁支反力下翼緣板焊縫應(yīng)力根據(jù)A8及Q235，下翼緣板采用雙面貼角焊縫，應(yīng)力集中等級(jí)，查得 焊縫拉伸疲勞許用應(yīng)力 合格按查得取拉伸疲勞許用應(yīng)力 合格4．穩(wěn)定性整體穩(wěn)定性 （穩(wěn)定）局部穩(wěn)定性 翼緣板 （穩(wěn)定）腹板 不需設(shè)置橫隔板。致謝經(jīng)過近三個(gè)月的設(shè)計(jì)，我對(duì)橋式鑄造起重機(jī)的設(shè)計(jì)步驟、內(nèi)容和方法有了更深入的了解，同時(shí)鞏固了已學(xué)的金屬結(jié)構(gòu)的相關(guān)知識(shí)，為以后的工作學(xué)習(xí)打下了堅(jiān)實(shí)的基礎(chǔ)。由于時(shí)間較緊，而且我也是第一次完成這樣完整的設(shè)計(jì)，由于實(shí)踐經(jīng)驗(yàn)的欠缺，在設(shè)計(jì)中一定有許多考慮不周的地方。該集團(tuán)包括世界最大的港口集裝箱起重機(jī)生廠商振華港口機(jī)械有限公司（ZPMC）