Name: lifting tong force analysis
Uploaded: 2023-09-22T11:49:25.000Z
Duration: 1 min 30 s
Channel: JoVE

100 kg'lık bir yük taşıyan bir kaldırma maşası düşünün. AB elemanı ile birbirine bağlı DAF ve CBG hareketli bölümlerinden oluşur.
Yapının E noktası etrafında simetrik olduğunu varsayarsak, AB elemanına hangi kuvvet etki ediyor?
E noktasına etki eden kuvvetleri gösteren bir serbest cisim diyagramı çizilir.
Kablonun çekme kuvveti, yükün ağırlığını dengeler ve dikey olarak yukarı doğru hareket eder.
ED ve EC iki kuvvet üyesidir. Böylece, FED ve FEC kuvvetleri sırasıyla D ve C eklemlerine yönlendirilir.
Bu kuvvetler yatay ve dikey bileşenlere çözülür ve yapının geometrisi, ED elemanı ile yatay kuvvet bileşeni arasındaki açıyı belirlemek için uygulanır.
Kuvvet denge koşulunun yatay yönde uygulanması, FED'nin FEC'ye eşit olmasını sağlar.
Benzer şekilde, dikey kuvvet denge koşulu, eleman EDi boyunca kuvveti verir.
Şimdi, DAF bölümü için bir serbest cisim diyagramı düşünün. Moment denge koşulu F eklemine uygulanabilir.
Bilinen tüm değerleri denkleme koymak, AB elemanı boyunca kuvveti verir.

<ol>
	<li>Hibbeler, R.C. (2016). Mühendislik Mekaniği \u2012 Statik ve Dinamik. Hoboken, New Jersey: Pearson Prentice HallPppp 305.</li>
	<li>Bira, F.P.; Johnston, E.R.; Mazurek, D.F; Cromwell, P.J. ve Öz, B.P. (2019). Mühendisler için Vektör Mekaniği \u2012 Statik ve Dinamik. New York: McGraw-Tepesi. sayfa 348</li>
	<li>Meriam, J.L., Kraige, L.G. ve Bolton, J.N. (2020). Mühendislik Mekaniği \u2012 Statik. Hoboken, New Jersey: John Wiley. sayfa 200</li>
</ol>

Herhangi bir çıkar çatışması beyan edilmedi.

makinalar: problem Çözme ii

Makinalar hareketli, birleştirilmiş çoklu kuvvetli üyelerden oluşan karmaşık yapılar olup kuvvetlerin iletilmesi için bir arada çalışırlar. 100 kg yük taşıyan bir kaldırma kıskaçını düşünelim. Bu, hareketli kesimler DAF ve CBG üyelerinin AB üyesi ile birleştirilmiş olduğu bir yapıdır.

<img alt="Figure 1" src="/files/ftp_upload/14295/14295_PT_Fig_1v2.svg" style="text-align: center; height: 350px;" />

Yapının E noktasında simetrik olduğunu varsayarsak, AB üyesi üzerinde etki eden kuvvet hesaplanabilir.

İlk olarak, E noktasında etki eden kuvvetleri gösteren bir serbest cisim diyagramı ele alınır. Yükün yerçekimi ivmesiyle çarpılmış kütlesine eşit olan yükün ağırlığı 981 N olarak hesaplanır. Halatın germe kuvveti, yükün ağırlığını dengeleyerek dikey yönde yukarı doğru etki eder. ED ve EC iki kuvvetli üyedir. Sonuç olarak, F_ED ve F_EC kuvvetleri sırasıyla D ve C mafsal noktalarına doğru yönlendirilir.

Daha sonra, F_ED ve F_EC kuvvetleri yatay ve dikey bileşenlere ayrıştırılır. Yapının geometrisi, ED üyesi ile yatay kuvvet bileşeni arasındaki açıyı 30.96 derece olarak hesaplayabilir.

Kuvvet dengesi koşulları E noktasına uygulanabilir.

<img alt="Equation 1" src="/files/ftp_upload/14295/14295_PT_Equation_1v2.svg" style="text-align: center; height: 13px;" />

<img alt="Equation 2" src="/files/ftp_upload/14295/14295_PT_Equation_2v2.svg" style="text-align: center; height: 13px;" />

Yatay yöndeki kuvvet dengesi koşulu sağlar ki FED kuvvetinin FEC'ye eşit olduğunu söyler. Benzer şekilde, dikey kuvvet dengesi koşulu ED üyesi boyunca etki eden kuvveti 953.46 N olarak belirler.

Şimdi, DAF kesimi için bir serbest cisim diyagramı ele alınır. Moment denge koşulu F noktasına uygulanabilir.

<img alt="Equation 3" src="/files/ftp_upload/14295/14295_PT_Equation_3v2.svg" style="text-align: center; height: 13px;" />

Sonuç, AB üyesi boyunca etki eden kuvveti 2423.76 N olarak verir.

Bu kaldırma kıskaç sisteminde her üyenin üzerinde etki eden kuvvetleri anlamak, güvenli işletmeyi sağlamak ve verimli kaldırma mekanizmaları tasarlamak için önemlidir. Mühendisler, kuvvetleri analiz ederek ve denge koşullarını uygulayarak yapının optimize edilmesini ve çeşitli koşullarda güvenli bir şekilde yük taşımasını sağlayabilirler.

Makinalar: Problem Çözme II

Makineler, kuvvetleri iletmek için birlikte çalışan hareketli, pime bağlı çoklu kuvvet elemanlarından oluşan karmaşık yapılardır. Bir kaldırma maşası düşünün ...

Education

JoVE Core

Mechanical Engineering

Makine Mühendisliği

Unit 1

Ünite 1

Structural Analysis

Yapısal Analiz

KEY TERMS AND CONCEPTS

TEMEL TERİMLER VE KAVRAMLAR

Machines: Problem Solving II

lifting tong force analysis

Lifting tong force analysis shows how forces move through a pin-connected machine. The structure uses movable sections DAF and CBG with member AB linking them together. Because these parts work as connected members, the load can be studied with equilibrium methods.

The example starts with a 100 kg load at point E. The load weight is found by multiplying mass by gravity, which gives 981 N. The cable tension acts upward and balances that weight. Since the structure is symmetrical at E, the forces on the two sides can be compared.

Members ED and EC are two-force members, so their forces act along the members toward joints D and C. Their forces are then split into horizontal and vertical parts. Using the geometry of the tong, the angle between member ED and the horizontal is 30.96 degrees. Force equilibrium at joint E shows that F ED equals F EC, and the vertical balance gives the force in member ED as 953.46 N.

After that, a free-body diagram for section DAF is used. The moment equilibrium condition is applied at joint F. This step gives the force in member AB as 2423.76 N. This kind of analysis helps engineers check the forces in each member so lifting systems can work safely and efficiently under load.

Lifting Tong Force Analysis

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machines: problem solving ii

Lifting tong force analysis shows how forces move through a pin-connected machine. The structure uses movable sections DAF and CBG with member AB linking them together. Because these parts work as connected members, the load can be studied with equilibrium methods. The example starts with a 100 kg load at point E. The load weight is found by multiplying mass by gravity, which gives 981 N. The cable tension acts upward and balances that weight. Since the structure is symmetrical at E, the...

key terms and concepts

Analyze a lifting tong with pin-connected members, symmetry, and equilibrium. See how force, tension, and moments determine the load on member AB.

Lifting Tong Force Analysis | JoVE K12

JoVE Core Makine Mühendisliği, denge, kuvvetler, kafes kiriş analizi ve yapısal mekanik gibi temel konuları kapsayan kısa, anlaşılması kolay animasyonlu videolar sunar. Gerçek dünyadaki uygulamalarını keşfedin ve bilim insanlarının önderlik ettiği deneylerle bu kavramların uygulanmasına tanık olun.

mechanical engineering

Lifting Tong Force Analysis

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