儲(chǔ)罐設(shè)計(jì)計(jì)算書 | |
1.設(shè)計(jì)基本參數(shù): | | | | | | | |
| 設(shè)計(jì)規(guī)范: | GB50341-2003《立式圓筒形鋼制焊接油罐設(shè)計(jì)規(guī)范》 | | |
| 設(shè)計(jì)壓力: | P | 2000 | Pa | -500 | Pa | | | |
| 設(shè)計(jì)溫度: | T | 50 | °C | | | | | |
| 設(shè)計(jì)風(fēng)壓: | ω0 | 540 | Pa | | | | | |
| 設(shè)計(jì)雪壓 | Px | 300 | Pa | | | | | |
| 附加荷載: | Ph | 1200 | Pa | | | | | |
| 地震烈度: | | 8 | 度 | 0.2g | Ⅱ類第一組 | | |
| 罐壁內(nèi)徑: | D | 24 | m | | | | | |
| 罐壁高度: | H1 | 13 | m | | | | | |
| 充液高度: | H | 13 | m | | | | | |
| 液體比重: | ρ | 1.5 | | | | | | |
| 罐頂半徑: | Rs | 24 | m | | | | | |
| 焊縫系數(shù): | Φ | 0.9 | | | | | | |
| 腐蝕裕量: | C2 | 0 | mm | | | | | |
| 鋼板負(fù)偏差: | C1 | 0.8 | mm | | | | | |
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2. 罐壁分段及假設(shè)壁厚: | | | | | | | |
| 罐壁尺寸、材料及許用應(yīng)力如下: | | | | | |
從下至上 分段號(hào) | 高度(m) | 厚度(mm) | 材料 | 設(shè)計(jì)[σ]d(MPa) | σs(MPa) | σb(MPa) | 水壓試驗(yàn)[σ]t(MPa) | 重量(kg) |
| 1 | 2 | 24 | 00Cr17Ni14Mo2 | 110 | 165 | 455.6 | 110 | 28438.5 |
| 2 | 2 | 22 | 00Cr17Ni14Mo2 | 110 | 165 | 455.6 | 110 | 26066.4 |
| 3 | 2 | 20 | 00Cr17Ni14Mo2 | 110 | 165 | 455.6 | 110 | 23694.8 |
| 4 | 2 | 16 | 00Cr17Ni14Mo2 | 110 | 165 | 455.6 | 110 | 18952.7 |
| 5 | 2 | 14 | 00Cr17Ni14Mo2 | 110 | 165 | 455.6 | 110 | 16582.2 |
| 6 | 1.5 | 10 | 00Cr17Ni14Mo2 | 110 | 165 | 455.6 | 110 | 8881.8 |
| 7 | 1.5 | 8 | 00Cr17Ni14Mo2 | 110 | 165 | 455.6 | 110 | 7104.9 |
| | | | | | | 總重: | mt | 129721.2 |
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3. 罐壁計(jì)算: | | | | | | |
| 1)設(shè)計(jì)厚度計(jì)算(儲(chǔ)存介質(zhì)): | | | | | |
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| 計(jì)算結(jié)果: | | | | | | | | |
| 從下至上分段數(shù) | 計(jì)算液位高度H(m) | 計(jì)算壁厚td(mm) | 名義厚度tn(mm) | | | | | |
| 1 | 13 | 23.4 | 24 | | | | | |
| 2 | 11.5 | 20.8 | 22 | | | | | |
| 3 | 10 | 18.1 | 20 | | | | | |
| 4 | 8 | 14.5 | 16 | | | | | |
| 5 | 6 | 11.0 | 14 | | | | | |
| 6 | 4 | 7.4 | 10 | | | | | |
| 7 | 2 | 3.8 | 8 | | | | | |
2)水壓試驗(yàn)厚度計(jì)算: | | | | | |
| Pict | | | | | | |
| 計(jì)算結(jié)果: | | | | | | | | |
| 從下至上分段數(shù) | 計(jì)算液位高度H(m) | 計(jì)算壁厚tt(mm) | | | | | | |
| 1 | 13 | 15.09 | | | | | | |
| 2 | 11.5 | 13.30 | | | | | | |
| 3 | 10 | 11.52 | | | | | | |
| 4 | 8 | 9.15 | | | | | | |
| 5 | 6 | 6.77 | | | | | | |
| 6 | 4 | 4.40 | | | | | | |
| 7 | 2 | 2.02 | | | | | | |
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4. 罐頂計(jì)算: | | | | | | |
| 4.1光面球殼頂板的計(jì)算厚度: | (如果不加肋板拱頂所需厚度) | |
| ths=0.42RsPower(Pw/2.2,0.5)+C2+C1 | 11.90 | mm | | | | |
| 設(shè)計(jì)外載荷 | Pw=Ph+Px+Pa | 2.67 | KPa | 注:按保守計(jì)算加上雪壓值。 |
| 實(shí)際罐頂取用厚度為 | th= | 8 | mm | 本設(shè)計(jì)按加肋板結(jié)構(gòu) | |
| 頂板及加強(qiáng)筋(含保溫層)總質(zhì)量 md= | 53863 | kg | | | | |
| 罐頂固定載荷 | Pa | 1166.82 | N/m2 | | | | |
4.2頂板計(jì)算 | | | | | |
4.2.1 拱頂?shù)脑S用外壓 | | | | | | |
4.2.1 帶肋拱頂?shù)脑S用外壓 | | | | | | |
| | Pict | | | | 4245 | Pa |
| 式中: | | | | | |
| [Po]——帶肋拱頂許用外壓 | | | | | | |
| Et——設(shè)計(jì)溫度下材料的彈性模量 | | | | 199875 | MPa |
| Rs——拱頂球面半徑; | | | | 24000 | mm |
| te——頂板有效厚度 | | | | 7.2 | mm |
| tm——帶肋頂板的折算厚度 | | | | | |
| | | | | 12.76 | mm |
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| | | | | | | | 3783.1 | mm |
| h1——緯向肋寬度 | | | 50 | mm |
| b1——緯向肋厚度 | | | 10 | mm |
| L1——緯向肋在經(jīng)向的間距 | | | 1500 | mm |
| e1——緯向肋與頂板在經(jīng)向的組合截面形心到頂板中面的距離 | | | |
| | | | 2.77 | mm |
| L1S——頂板有效參與筋板組合矩的寬度 | | | | |
| L1S=1.1(2Rste)0.5= | | | 646.67 | mm |
| Pict n1——緯向肋與頂板在經(jīng)向的面積折算系數(shù)
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| | | | 1.05 | |
| δ2m——經(jīng)向肋與頂板的折算厚度 | | | | |
| | | | 3783.1 | mm |
| h2——經(jīng)向肋寬度 | | | 50 | mm |
| b2——經(jīng)向肋厚度 | | | 10 | mm |
| L2——經(jīng)向肋在經(jīng)向的間距 | | | 1500 | mm |
| Pict e2——經(jīng)向肋與頂板在經(jīng)向的組合截面形心到頂板中面的距離
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| | | | 2.77 | mm |
| L2S——頂板有效參與筋板組合矩的寬度 | | | | |
| L2S=1.1(2Rste)0.5= | | | 646.67 | mm |
| Pict n2——經(jīng)向肋與頂板在經(jīng)向的面積折算系數(shù)
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| | | | 1.05 | |
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4.2.2 帶肋拱頂?shù)姆(wěn)定性驗(yàn)算 | | | | | | |
| 拱頂載荷 P=Pw | 2667 | N/m2 | | | | | |
| 拱頂許用外壓 [P0]: | 4245 | N/m2 | | | | | |
| ∵ [P0]>P,故滿足穩(wěn)定性要求,合格 |
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5.罐頂與罐壁的連接計(jì)算: | |
| 5.1. 幾何參數(shù)計(jì)算(如圖) | | |
| 角鋼規(guī)格: | ∠ | 140 | × | 140 | × | 10 | | |
| 罐頂與角鋼連接位置 | | B | | | 30 | mm | |
| 罐外半徑 | | | Rc | | | 12008 | mm | |
| 罐壁連接有效寬度 | Wc=0.6(Rcte)0.5 | 176.36 | mm | |
| 罐頂連接有效寬度 | Wh=Min[0.3(R2te) | 124.55 | mm | |
| 罐頂與罐壁連接處,罐頂切線與水平面夾角 | θ=arcsin((Rc+B)/Rs)= | 30.10 | ° | |
| 罐頂與罐壁連接處到罐中心線垂直距離 | R2=Rc/sinθ | 23940.19 | mm | |
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| 5.2. 罐頂與罐壁連接 |
| 罐頂與罐壁連接處的有效截面積(按A.3.2) |
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| | | | 1805.77 | mm2 | | | | |
| 注:此處的設(shè)計(jì)壓力應(yīng)為設(shè)計(jì)內(nèi)壓,不可等同于按液柱所確定的設(shè)計(jì)壓力。 | |
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| 罐頂與罐壁連接處的有效截面積(按7.5.3) |
| | A2=4.6DR2 | 2643.00 | mm2 | | | | |
| 罐頂與罐壁連接處的實(shí)際截面積(按圖7.1.5確定) |
| | Aa= | 6277.50 | mm2 | | | | |
| 實(shí)際截面積大于所需有效截面積,滿足設(shè)計(jì)要求 | | | |
| 注:如果Aa≥mtg/(1415tgθ)= | 1551.14 | mm2 | | | | |
| 頂部 應(yīng)設(shè)置通氣裝置 | | | | | |
| 罐頂與罐壁連接處發(fā)生屈曲破壞壓力(按設(shè)計(jì)壓力P計(jì)算) |
| | PQ=1.6P-0.047th= | 3.20 | KPa | | | | |
| | 其中: | g= | 9.81 | m/s2 | | | | |
| 滿足連接要求 | | | | |
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6. 風(fēng)載荷及地震載荷計(jì)算 | | | | | | | |