This differ with computation modal that design the foundation pier very big , bearing power too than design increment ; usage mechanics numerical analysis device with limited a logarithm of timw fitting method logt , noted the rock strength in stake tip of the borehole cast - in - place concrete pile to proceed with the structure steadiness the simulation compute to study with the fixed amount , designing for the engineering to start construction to provide for science with the spot 本研究結合現場試驗、力學數值分析和有限單元分析,對巖溶地段鉆孔灌注樁的施工工藝、荷載傳遞機理、持力層頂板厚度及嵌巖深度等方面作一些探討性研究,為該工程的設計和施工積累經驗,并為該類課題的進一步研究奠定了基礎。
Abstract : finite element method of tire temperaturefield is introduced in th is paper . temperature distribution curves of tire 9 . 00r20 underspecific conditio n are given . the results will provide theoretical basis for developingnew tire a nd optimizing tire structures 文摘:介紹了輪胎溫度場的有限單元分析方法,分析了9 . 00r20子午線結構輪胎在特定條件下的溫度場分布情況,給出了溫度場分布云圖和溫度分布曲線,目的是為輪胎的研制開發提供可靠的理論依據,以便優化輪胎結構
The main research works and conclusions of this thesis are listed as follows . the dynamic analysis model of elastic mechanism system with damping alloy parts is deduced based on the relationship between stress and strain of the material , also the analysis model under viscous damping model , complex damping model , nonlinear damping model and viscous - elastic damping model is put forward using the finite element method 本文的主要研究工作及結論如下:從材料應力應變本構關系出發,導出了滯變阻尼模型、復阻尼模型、非線性阻尼模型、粘彈性阻尼模型下的有限單元分析模型,進而給出了含阻尼合金構件彈性連桿機構系統動力學模型。
Which often produces some unexpected problems , such as prolonging time limit of project , increasing engineering quantities and cost , etc . through test on the site , dynamic value analysis , finite element unit method , the paper researchs construction technology of in - situ pile , transfer theory , thickness of supporting layer of head slab and depth of pile in karst area , provides some important conclusions , directs effectively the design and construction of this kind of projects 但因溶洞的分布規律性差,現有勘探手段難于事先查明它的準確位置及大小,因而常常給施工帶來意想不到的問題:工期延長、工程量增加及工程費用增加等。本文通過現場試驗、理論計算和有限單元分析,對巖溶地區鉆孔灌注樁的施工工藝、荷載傳遞機理、持力層頂板厚度及嵌巖深度等方面進行了較為系統的研究,得出了一些重要結論,有效地指導了該類工程的設計和施工。
Thirdly , to improve the application of light gauge steel structure in our country , some experimentations of institute of new - style steel structure which adopting native productions are induced nally , three - dimensional finite element model is presented . compared with the tests , mumerical results are verified much accurate and efficient , therefore a reliable way is provided to utilize the computational technique adequately to reduce the tests and to utilize the experimental results adequately to improve design quality , ( 3 ) study on floor system . not only adequate strength , stiffness and integer stabilization must be provided , but also insulation , fire and acoustics must be satified 本文首先論述了lgsfcbw各種破壞模式及其原因,總結了各因素對lgsfcbw抗剪性能的影響,從而為我國引進和應用輕鋼龍骨結構體系奠定了基礎;其次從試驗模型、試驗方法和試驗結果三方面探討了國外lgsfcbw抗震性能的研究,并分析該體系的破壞模式和抗震特性、提出研究建議;然后介紹了為推動輕鋼龍骨住宅國產化,我們采用國產材料開展的系列試驗;最后提出了lgsfcbw的有限單元分析法,數值計算與試驗結果一致,為充分利用計算技術減少試驗數量和充分利用試驗成果提高設計水平提供了一條可靠途徑。