[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fhCVJqNEOdSTmZtxiJ5gFQlc5DdCkZ3khBMuIj8rtwb4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":21,"type":22},[],"2025-12-16 16:04:10",268621211,[8,9,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbd748aeaf7c97cfd9de37d149c0c0047.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7063112782fbddfa2aa4e367ce634637.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb35fd4cac15c1cbc315b4ec742c81695.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5bae579d348f7997329a7fa91107a948.png\">",{"courseId":13,"courseImg":14,"courseName":15},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","T形截面的梁两端受力偶矩作用,如图.若材料的抗压许用应力大于抗拉许用应力,则梁截面的位置应如何安放?( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4607fa344eb53780d30f023893ec177d.png\">",[18,23,32,41,50],{"answer":19,"createTime":5,"id":6,"options":20,"question":16,"source":21,"type":22},[],[8,9,10,11],"v1",0,{"answer":24,"createTime":5,"id":25,"options":26,"question":31,"source":21,"type":22},[],268621212,[27,28,29,30],"形心主惯性轴","中性轴","形心轴","对称轴","在梁的正应力公式,为梁截面对于( )的惯性矩",{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":21,"type":22},[],268621213,[36,37,38,39],"18kN","16kN","21kN","24kN","长4m的悬臂梁,自由端受集中力P作用.梁的材料为铸铁,许用拉应力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd5ad7cbec14421b8b9d3e4d68d999e22.webp\">,许用压应力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2d46e292b1509c6342c77d7392325cec.webp\">.梁的截面如图,h=200mm,截面形心离下缘的距离a=160mm,截面的形心主惯性矩\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6ade8bda7091d0160670f9de7e301745.webp\">.P的最大容许值为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F37feed498018c2e0e4ab408865b42ae3.png\">",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":21,"type":22},[],268621214,[45,46,47,48],"280kN","160kN","240kN","200kN","长4cm的简支梁,跨度中央受集中力P作用.梁采用No.45b工字钢(抗弯截面模量W=1500cm3),许用应力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F73958da0b254633e3704cbcabddc5b1f.webp\">.则P的最大容许值为( )",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":21,"type":22},[],268621215,[54,55,56,57],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4bb052de6bb2bf5f088b757180d9916c.webp\">,位于截面B的上、下缘","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2c904d7e493a4ff3204e762252516db3.webp\">,位于截面B的上、下缘","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F96b069b0b51301a4dbc296be045bf5a4.webp\">,位于截面C的上、下缘","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2c904d7e493a4ff3204e762252516db3.webp\">,位于截面C的上、下缘","矩形截面的外伸梁受载情况如图.\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F56a55313ad2baa7a19f46b318a51ed7a.webp\">,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4bed7dcb71b769c42a7f913dd3a015b2.webp\">,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1820a8709b74830c1d34a81dfa4d5f21.webp\">.截面的宽度和高度分别为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F651ea89295fbfee4669d91ae408052cb.webp\">,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6d500044c841cb66d5b5ecc0b01b9991.webp\">.求梁内最大正应力的数值和位置.\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8e88b71cd74448af6eb42c63ede29dad.png\">"]