This paper adopts the large diameter cast-in-situ piles of the north pier of anqing changjiang highway bridge as the study backgrounds, uses the pile calculative program, gpile that is a part of the common program software system of finite element method, sap84, to calculate and analysis the pile group effect of large diameter cast-in-situ piles deeply with different coefficients of pile group effect 本文以安慶長江公路大橋北塔墩大直徑鉆孔灌注群樁基礎(chǔ)為研究背景,應(yīng)用有限單元法通用程序軟件系統(tǒng)sap84中的gpile樁基計(jì)算程序?qū)Σ煌簶缎?yīng)系數(shù)下大直徑鉆孔灌注樁的群樁效應(yīng)進(jìn)行較深入的計(jì)算和分析。
The company is a specialized machinery manufacture enterprise, its main products are : mid speed wire cut machine, wire cut common electronic control device, wire cut control and program software . the company is first established in 1994, which is named as ningbo aoqiang research institute, and is famous for pm wire cut program software nation code : 970232 家專業(yè)設(shè)計(jì)生產(chǎn)中走絲線切割機(jī)床,線切割控制電器,線切割編控軟件pm軟件國家版權(quán)號:970232,pw軟件國家版號:2004sr07244的高科技企業(yè)。
The company is a specialized machinery manufacture enterprise, its main products are : mid speed wire cut machine, wire cut common electronic control device, wire cut control and program software . the company is first established in 1994, which is named as ningbo aoqiang research institute, and is famous for pm wire cut program software nation code : 970232 家專業(yè)設(shè)計(jì)生產(chǎn)中走絲線切割機(jī)床,線切割控制電器,線切割編控軟件pm軟件國家版權(quán)號:970232,pw軟件國家版號:2004sr07244的高科技企業(yè)。
Through using step7 micro win program software of simens company in german in the control system, a pid controller of pressure control within plc is designed . the controller can compare the measure value and the value in advance of pressure . through real-time controlling the output voltage and frequency of transducer, the output quality of pump is changed along with the changing of pump's speed 控制系統(tǒng)中采用了德國simens公司的step7microwin編程軟件,設(shè)計(jì)了一個(gè)用于供水系統(tǒng)壓力控制的pid控制器,pid控制器內(nèi)置在plc中,該控制器對壓力給定值與測量值的偏差進(jìn)行處理,實(shí)時(shí)控制變頻器的輸出電壓和頻率,進(jìn)而改變水泵電動機(jī)的轉(zhuǎn)速來改變水泵出水口流量,實(shí)現(xiàn)管網(wǎng)壓力的自動調(diào)節(jié),使管網(wǎng)壓力穩(wěn)定在設(shè)定值附近。